Dental Faculty

Clinical Updates

Our new Rapid Clinical Updates Series is here!

Stay up to date in just 3 minutes with the latest clinical research in all aspects of dentistry.

PennDental_Logo

Rapid and concise

PennDental_Logo

Relevant to everyday practice

PennDental_Logo

Easy to read

PennDental_Logo

Complimentary to all registered dentists

GENERAL DENTISTRY

GENERAL DENTISTRYConsumption of fluoridated milk protects dental enamel

The effect on enamel of varying the frequency of consumption of 1.0 mg F in milk once per day, twice per day or once every other day under cariogenic challenge in situ was studied by Malinowski, M., et al., 2017. In a controlled study, subjects wore an intra-oral lower removable appliance with enamel slabs for three weeks during each study arm. Subjects used F-free toothpaste, the cariogenic challenge comprising of five 2 min dippings per day in a 12% sucrose solution. Subjects dipped the appliances in 50 ml of 5.0 ppm fluoridated milk for five minutes during the test period once per day, twice per day, and once every other day and drank 200 ml of the same milk, once per day, twice per day (100 ml each time), or once every other day (200 ml) immediately on re-inserting their appliance in order to replicate topical and systemic effects. Slabs were analysed with surface microhardness (SMH) for protection against further demineralisation and transverse microradiography (TMR) to assess changes in mineralisation.

Clinical implication: Using SMH, 200 ml of 5.0 ppm F milk once per day was significantly better than 100 ml of 5.0 ppm F twice/day (p < 0.05) and 200 ml once every other day, but not significantly. Using TMR there was a statistically significant difference in mineral loss of enamel between baseline and treatment for all groups, but not between groups.

Practical application: It is optimal to drink 200 ml of 5.0 ppm milk daily or every other day to protect enamel against further demineralisation. Drinking either 100ml of 5.0 ppm F twice daily or 200 ml daily or every other day is effective in promoting remineralisation.

Reference: Malinowski, M., Toumba, K.J., Strafford, S.M. and Duggal, M.S., 2017. The effect on dental enamel of the frequency of consumption of fluoridated milk with a cariogenic challenge in situ. Journal of dentistry.

PERIODONTICS

PERIODONTICSPeriodontal status of tooth adjacent to implant

The association between the periodontal status at the near and away sites of the teeth (according to implant) and the implant status (without/with peri-implantitis) was examined in a total 560 sites of 70 teeth/implant sets by Sung, C.E., 2018. Fifty-three subjects with existing dental implants and chronic periodontitis were examined. Seventy implants were categorised into peri-implantitis and healthy/mucositis groups. The periodontal and peri-implant status, including probing depth (PD), clinical attachment level (CAL), and gingival recession (GR) were measured at 6 sites around the implants and the teeth adjacent and contralateral to those implants. A significantly different mean PD and CAL were noted at the near sites of the teeth adjacent to the implants with peri-implantitis when compared with the away sites of adjacent and contralateral teeth and the near sites of contralateral teeth. The presence of peri-implantitis and tooth location were significantly associated with the values of the PD and CAL of the teeth.

Clinical implication: The existence of peri-implantitis is significantly associated with the periodontal measurements of the remaining teeth close to the implant.

Practical application: Implants showing signs of peri-implantitis contain subgingival microbiota similar to that around natural teeth with periodontal disease. A history of periodontitis as a possible risk factor for peri-implantitis.

Reference: Sung, C.E., Chiang, C.Y., Chiu, H.C., Shieh, Y.S., Lin, F.G. and Fu, E., 2018. Periodontal status of tooth adjacent to implant with peri-implantitis. Journal of dentistry.

 

PROSTHODONTICS

PROSTHODONTICSThe associations of pain symptoms with visible cracks

The associations of types of pain (pain on biting, pain due to cold stimuli or spontaneous pain) with crack-level, tooth-level and patient-level characteristics in posterior teeth with visible cracks were analysed by Hilton, T.J., et al., 2017. Subjects each had a single, vital posterior tooth with at least one observable external crack (cracked teeth); 2858 cracked teeth from 209 dentists were enrolled. Data were collected at the patient-, tooth-, and crack-level. Overall, 45% of cracked teeth had one or more symptoms. Pain to cold was the most common symptom, which occurred in 37% of cracked teeth. Pain on biting (16%) and spontaneous pain (11%) were less common. Sixty-five percent of symptomatic cracked teeth had only one type of symptom, of these 78% were painful only to cold.

Clinical implication: Positive associations for various combinations of pain symptoms were present with cracks that: (1) were on molars; (2) were in occlusion; (3) had a wear facet through enamel; (4) had caries; (5) were evident on a radiograph; (6) ran in more than one direction; (7) blocked transilluminated light; (8) connected with another crack; (9) extended onto the root; (10) extended in more than one direction; or (11) were on the distal surface. No patient-, tooth- or crack-level characteristic was significantly associated with pain to cold alone.

Practical application: Although often considered the most reliable diagnosis for a cracked tooth, pain on biting is not the most common symptom of a tooth with a visible crack, but rather pain to cold.

Reference: Hilton, T.J., Funkhouser, E., Ferracane, J.L., Gordan, V.V., Huff, K.D., Barna, J., Mungia, R., Marker, T., Gilbert, G.H. and National Dental PBRN Collaborative Group, 2017. Associations of Types of Pain with Crack-Level, Tooth-Level and Patient-Level Characteristics in Posterior Teeth with Visible Cracks: Findings from the National Dental Practice-Based Research Network. Journal of dentistry.

IMPLANTS

IMPLANTSImplant or root canal treatment has a higher survival rates?

Chatzopoulos, G.S., et al., 2018 assessed and compared the survival rates of implant and root canal treatment and investigated the effect of patient and tooth related variables on the treatment outcome in a large-scale population-based study. A total of 13,434 records of patients who had implant (33.6%) or root canal therapy (66.4%) were included. The survival rate analysis revealed the majority of the implants were removed within the first year (58.8%), while only 35.2% of the root canal treatments failed in the same time period. The overall survival rate was significantly higher for implant therapy (98.3%) compared to root canal treatment (72.7%).

Clinical implication: A statistically significant association was found between treatment, age and anxiety with treatment failure for both implants and root canal treatment.

Practical application: Although both root canal and implant treatments are sound options with high survival rates; root canal therapy exhibited a significantly higher failure rate.

Reference: Chatzopoulos, G.S., Koidou, V.P., Lunos, S. and Wolff, L.F., 2018. Implant and root canal treatment: Survival rates and factors associated with treatment outcome. Journal of dentistry71, pp.61-66.

ORAL MEDICINE

ORAL MEDICINE

Effect of low-energy laser therapy on pain relief and wound healing

Recurrent apthous stomatitis (RAS) is very painful and affects quality of life. There is no current effective established therapy for RAS. Suter, VGA, et al., 2017 conducted a systematic review of databases to assess the effects of lower level laser therapy on relief of pain, wound healing and episode frequency in patients with RAS.

Clinical implication: LLLT decreased immediate pain statistically more than triamcinolone acetonide (medium- to strong-potency corticosteroid) or placebo. LLTL decreased late pain more than topical corticosteroids, topical solcoseryl or granofurin, placebo or no treatment. The light wavelength (658 nm) used for the laser managed both pain and inflammation.

Practical application: LLLT improved wound healing statistically more than triamcinolone acetonide, topical solcoseryl or granofurin, placebo or no treatment. Using light wavelength (658 nm) for the laser led to very efficient management of both pain and inflammation symptoms. Low-energy laser therapy applied is a reliable therapeutic modality to treat chronic (RAS).

Reference: Suter, V.G., Sjölund, S. and Bornstein, M.M., 2017. Effect of laser on pain relief and wound healing of recurrent aphthous stomatitis: a systematic review. Lasers in medical science32(4), pp.953-963.

PRACTICE MANAGEMENT

PRACTICE MANAGEMENT

Should you manage you practice using the cloud?

Jensen A., 2018 says this is the year of the cloud. The cloud enables the user to have a smaller footprint. No server or hefty workstation is needed to power management software. Servers are expensive, require monitoring and have high maintenance. Servers are subject to security regulations.

Clinical implication: There are no hassles with management software upgrades and moving to the cloud gives access to enterprise-class technology. Data can always be embraced on the cloud and provides greater data security. The cloud embraces your practice data, showing “love” from multiple servers in multiple geographic locations.

Practical application: Data backup occurs to the last keystroke. There are no backup worried. If data must be restored, you get back to exactly where you left off. Manage the practice in the cloud.

Reference: Andy Jensen. 2018. The top 3 reasons to give the cloud a little love. [ONLINE] Available at: https://www.dentaleconomics.com/articles/print/volume-108/issue-2/science-tech/the-top-3-reasons-to-give-the-cloud-a-little-love.html. [Accessed 30 June 2018].

MATERIALS

MATERIALSComparing four desensitizing toothpastes

Dentine hypersensitivity (DH) can cause a sharp, sudden, painful reaction when the teeth are exposed to hot, cold, chemical, mechanical, touch, or osmotic (sweet or salt) stimuli and cannot be attributed to any other form of dental pathology or defect. DH is a sudden short sharp pain best explained by hydrodynamic theory. The aim of the present study was to compare the tubule occluding efficacy of four different desensitizing dentifrices under scanning electron microscope (SEM). Sixty-two dentin blocks obtained from extracted human molars were randomly divided into five groups: Group 1 – no treatment; Group 2 – Pepsodent Pro-sensitive relief and repair; Group 3 – Sensodyne repair and protect ; Group 4 – Remin Pro ; Group 5 – Test toothpaste containing 15% nano-hydroxyapatite (n-HA) crystals . The specimens were brushed for 2 min/day for 14 days and stored in artificial saliva. After final brushing, specimens were gold sputtered and viewed under SEM at ×2000 magnification and analysed.

Clinical implication: All test groups showed significant increase in dentin tubule occlusion as compared to control group.

Practical application: Remin Pro and a Test toothpaste containing 15% nano-hydroxyapatite (n-HA) crystals had the highest percentage of tubules occlusion and was significantly different from other groups and can thereby reduce the pain and discomfort caused by DH.

Reference: Jena, A., Kala, S. and Shashirekha, G., 2017. Comparing the effectiveness of four desensitizing toothpastes on dentinal tubule occlusion: A scanning electron microscope analysis. Journal of conservative dentistry: JCD20(4), p.269.

 

 

 

 

AESTHETICS

AESTHETICSTreating fluorosis using a conservative restorative approach

Hoyle, P., et al., 2017 reviewed conservative management techniques available for managing the aesthetic impact of fluorosis from mild to severely affected patients. Fluoride dentifrices in developed countries has caused an increase in incidence of mild and very mild forms of fluorosis. Fluoridated water is a well-recognised risk factor of fluorosis. WHO guidelines of fluoride in drinking water upper limit is 1.5 mg-F/L. A particular cohort of patients in some Ethiopian areas experienced 10mg-F/L in the water. The prevalence of dental fluorosis in that area ranges from 70%−100% with 35% being affected by the severe form. As the severity of fluorosis increases so does the porosity and fluoride content of the sub-surface enamel, resulting in increased extrinsic staining.

Clinical implication: Management of dental fluorosis is dependent upon its severity.  Suggested treatment options include:1. Bleaching; 2. Micro/macroabrasion; 3. Composite restorations; 4. Veneers; 5. Full crowns. Enamel microabrasion is the uses simultaneous erosion and abrasion to remove the superficial enamel. It is intended to remove between 50−200 μm of enamel. This enamel removal is pressure dependant. Hydrochloric acid (18%) is used most commonly for microabrasion. Home bleaching using soft-plastic, vacuum-formed night guards, either with or without reservoirs, in conjunction with 10% carbamide peroxide has been used. The patient, usually on a nightly basis, uses these for 2−6 week periods. If bleaching is to be used with composites, allow two-weeks before composite placement to allow both for shade regression and for any residual oxygen to diffuse away, as it is thought to have a detrimental effect on composite bonding.

Practical application: A conservative restorative approach can be used to mask even severe fluorosis. Consideration of such techniques in treatment planning is required to reduce the biological cost of using more traditional methods.

Reference: Hoyle, P., Webb, L. and Nixon, P., 2017. Severe fluorosis treated by microabrasion and composite veneers. Dental Update44(2), pp.93-98.

ORTHODONTICS

ORTHODONTICSFactors associated with discontinued and abandoned treatment

McDougall N., et al., 2017 studied factors associated with discontinued and abandoned treatment. The rates of discontinued treatment have been show to remain consistently at 8% or higher.

Clinical implication: Discontinuation is much more likely with removable appliances compared with fixed appliances. Pre-adolescents are generally more adherent especially with functional appliances. Parental influence diminishes with age. Patients with greater perception of their malocclusion are likely to be adherent.

Practical application: A lack of patient compliance lies at the heart of the phenomenon of discontinued treatment. The most ideal patient-dentist relationship combines the thoughts of the patient with the knowledge and expertise of the dentist. A warm, caring clinician with a calm confident approach is likely to induce better adherence and patient satisfaction.

Reference: McDougall, N.I., McDonald, J. and Sherriff, A., 2017. Factors associated with discontinued and abandoned treatment in primary care orthodontic practice part 1. Orthodontic Update10(1), pp.8-14.

PERIODONTICS

PERIODONTICSMethamphetamine impact on periodontium

Methamphetamine (MA) use is associated with extensive dental caries and periodontal disease. Spolsky, V.W., et al., studied the prevalence and severity of periodontal disease in a sample of 546 MA users. Periodontal assessments were completed in 546 adults. More than 69% were also cigarette smokers and more than 55% were medium to high MA users.

Clinical implication: MA users had a high prevalence and severity of destructive periodontal disease. The frequency of MA use had minimal impact on the severity of periodontal disease.

Practical application: Although an MA user can be at high risk of developing periodontal disease, behavioral factors such as smoking and consuming sugary beverages are more deleterious than MA use alone. These facts will help the clinician manage treatment of MA users.

Reference: Spolsky, V.W., Clague, J., Murphy, D.A., Vitero, S., Dye, B.A., Belin, T.R. and Shetty, V., 2018. Periodontal status of current methamphetamine users. The Journal of the American Dental Association149(3), pp.174-183.

 

 

 

ORAL SURGERY

ORAL SURGERY 1Rinsing 3rd molar extraction sites is inferior to irrigation

Pain, trismus and swelling after third-molar removal can compromise oral hygiene and inhibit the healing process.

The accumulation of food debris in the surgical area increases the risk of infection and dry socket. Cho, G., et al., compared irrigation with medicated rinsing after third-molar removal.

Clinical implication: There was significantly less pain, alveolar osteitis, food impaction and facial swelling 7 days after surgery among patients who used irrigation of the surgical site compared with patients who rinse with the same chlorhexidine solution.

Practical application: Routine patient-administered irrigation of the surgical area with 0.2% chlorhexidine solution after third-molar removal reduces the incidence of dry socket. Dry socket occurs in 25-35% of patient after removal of impacted lower third molars which is about 10 times more often than after removal of teeth from all other sites.

Reference: Cho, H., David, M.C., Lynham, A.J. and Hsu, E., 2018. Effectiveness of irrigation with chlorhexidine after removal of mandibular third molars: a randomised controlled trial. British Journal of Oral and Maxillofacial Surgery56(1), pp.54-59.

 

ANALGESIA AND PAIN MANAGEMENT

ANALGESIA AND PAIN MANAGEMENT

Do we really need to prescribe opioids?

Effective pain management is a priority in dental practice. Moore, P.A., et al., summarized the available evidence on the benefits and harms of analgesic agents associated with orally administered medication or medication combinations for relief of acute pain. Reviews were inclusive of all age populations.

The data identified combinations of ibuprofen and paracetamol as having the highest association with treatment benefits in adult patients and the highest proportion of patients who experienced pain relief.

Clinical implication: Relief of postoperative pain in dental practice with the use of non-steroidal anti-inflammatory drugs with or without paracetamol is equal or superior to that provided by opioid-containing medications.

Practical application: The combination of 400mg of ibuprofen plus 1000mg of paracetamol was found to be superior to any opioid-containing medication or medication combination studied. The implications of this study suggest that prescribing narcotic or opioid medications, with their abundance of side effects and propensity for addiction, may not be necessary in clinical practice.

Reference: Moore, P.A., Ziegler, K.M., Lipman, R.D., Aminoshariae, A., Carrasco-Labra, A. and Mariotti, A., 2018. Benefits and harms associated with analgesic medications used in the management of acute dental pain: An overview of systematic reviews.The Journal of the American Dental Association149(4), pp.256-265.

PRACTICE MANAGEMENT

PRACTICE MANAGEMENT

Does your patient really listen to you?

A patient’s ability to recollect and understand treatment information during the consultative process plays an important role in decision making for proposed treatment. Moreira, N.C.F., et al., systematically reviewed nineteen studies assessing recollection or comprehension of dental informed consent in adults.

Clinical implication: Patients in general report that they understand information given to them but they may have limited grasp of the details. Given that they are often in a stressful clinical environment, patients often accede to treatment options which they do not fully comprehend in order to extricate themselves from the immediate stress. This can lead to post-operative confusion, anxiety and possible conflict.

Accurate documentation and record taking, including visual imagery and videography, are excellent adjuncts to a standard consultation to ensure that the patients do actually comprehend treatment options completely.

Practical Application:  Clinicians should try and include adjunctive resources for patients such as leaflets, decision boards and audio-visual material when sharing important treatment information with patients. Dentists should not only rely on a patient’s self-reported understanding of information as it may not be a true representation of their real comprehension. Periodic repetition of comprehension and recollection of information is imperative. This is particularly relevant in complex multi-discipline treatment plans such as orthodontics, implants, periodontics and aesthetic augmentation.

Reference:  Moreira, N.C.F., Pachêco-Pereira, C., Keenan, L., Cummings, G. and Flores-Mir, C., 2016. Informed consent comprehension and recollection in adult dental patients: A systematic review. The Journal of the American Dental Association147(8), pp.605-619.

 

CROWN AND BRIDGEWORK

CROWN AND BRIDGEWORK

Monolithic zirconia exhibits low failure rates

The demand for all-ceramic materials has increased for reasons of aesthetics, wear resistance, colour stability and the high cost of noble metals. Sulaiman, T.A., et al., studied the failure rate of monolithic zirconia restorations due to fracture up to 5 years of clinical performance. The overall fracture rate of up to 5 years for all restorations (anterior and posterior) was 1.09%.

Clinical implication: Fracture rates were higher for anterior single crowns and than for posterior single crowns. Fracture rates of bridges were higher than single crowns. Fracture rates of posterior bridges were fewer than anterior bridges.

Practical application: Indirect restorations made from monolithic zirconia exhibit a low fracture rate up to 5 years which are vastly superior to lithium disilicate or other silicone dioxide all-ceramics. In particular, prostheses fabricated in the posterior segments of the mouth seem more resistant to failure in spite of greater mechanical loading. Many dentists do not adequately provide enough occlusal (palatal) reduction in crown preparations in the anterior maxilla and compromise the strength significantly. It is imperative that this reduction be considered carefully when prescribing any all ceramic crown or bridge.

Reference: Sulaiman, T.A., Abdulmajeed, A.A., Donovan, T.E., Cooper, L.F. and Walter, R., 2016. Fracture rate of monolithic zirconia restorations up to 5 years: A dental laboratory survey. Journal of Prosthetic Dentistry116(3), pp.436-439.

 

ORTHODONTICS

ORTHODONTICS

White spot lesions after orthodontic therapy

White spot lesions (WSLs) are a problem commonly found in patients who use orthodontic devices. Fluoride varnish can reduce WSLs during orthodontic treatment with fixed appliances. Rahimi, F., et al., 2017 conducted a systematic review to evaluate the efficacy of fluoride varnish compared with other agents for preventing WSLs during orthodontic treatment.  Out of 432 studies searched from the databases, 14 studies were included in the systematic review. The review showed that fluoride varnish combined with chlorhexidine (CHX) may be a good treatment for WSLs after orthodontic treatment, especially for a 6-month period and that resin infiltration might also be effective for preventing WSLs.

Clinical implication: Fluoride varnish combined with CHX could be an effective treatment for WSLs after orthodontic procedures. It is best that fluoride varnish be available for 6-month period of treatment, at least. The study review also demonstrated or concluded that treatment with resin infiltration in conjunction with fluoride varnish is a promising combination for controlling proximal lesions (e.g. WSLs).

Practical application: The first 6 months are very important in the development of WSLs as the majority of adolescent patients need to adapt their hygienic practices to the requirements of orthodontic therapy.

Reference: Rahimi, F., Sadeghi, M. and Mozaffari, H.R., 2017. Efficacy of fluoride varnish for prevention of white spot lesions during orthodontic treatment with fixed appliances: A systematic review study. Biomedical Research and Therapy4(08), pp.1513-1526.

PROSTHODONTICS

PROSTHODONTICS 1Are intra-oral scanners more accurate?

There has been a rise in popularity of digital impression taking and questions have been raised about accuracy, reliability and cost effectiveness.  Tsirogiannis, P. et al., 2016 systematically compared outcomes of available studies investigating marginal fit of single tooth-supported ceramic crowns made from digital impressions with conventional impression methods and analyzed the data.

Clinical implication: In vivo studies showed mean marginal discrepancies of 69.2 microns and 56.1 microns calculated respectively for conventional and digital impressions respectively which were not significant statistically.

Practical application: Digital workflows utilizing intra-oral scanners for data capture perform equally well compared with conventional impression techniques. Comfort for the patient and speed of data transfer for external fabrication of prostheses are noteworthy advantages in favour of the digital process.

However, the onerous up-front capital investment and on-going costs associated with the manufacturing process make it very difficult to justify financially, especially for the single-chair practice and when clinical outcomes are similar between the techniques.

Regardless of the technique of data capture, principles of tooth preparation and soft tissue management must be adhered to meticulously.

Reference: Tsirogiannis, P., Reissmann, D.R. and Heydecke, G., 2016. Evaluation of the marginal fit of single-unit, complete-coverage ceramic restorations fabricated after digital and conventional impressions: a systematic review and meta-analysis. Journal of Prosthetic Dentistry116(3), pp.328-335.

AESTHETICS

AESTHETICSThe efficacy of in-office bleaching

The efficacy of in-office bleaching on stain removal from stained resin composite, ceramic, hybrid-ceramic and resin-based CAD/CAM blocks and direct resin composites was evaluated.

Alharbi, A. et al., collected samples that were made from nine different materials and were randomly divided into five groups: each stained with a particular staining solution and analysed with a spectrophotometer. Samples were then subjected to in-office bleaching with 40% hydrogen peroxide gel for one hour which is the maximum time advised in this in vitro study.

Clinical implication: In-office bleaching may be a suitable treatment for patients who wish to augment the aesthetics of hybrid-ceramic and resin-based CAD/CAM resin block restorations as a result of staining. Bleaching efficacy was limited in direct composite resins. Red wine caused the most staining in all groups of materials whilst coffee left the greatest residual colour change.

Practical application: Bleaching resulted in significant differences in ΔE (colour) values for all materials. Bleaching efficacy was highly influenced by material composition and staining solution. Residual colour values after bleaching for ceramic and hybrid ceramics ranged from -0.49 to 2.35, within the clinically acceptable maximum of 3.3. Values after bleaching for resin-based CAD/CAM ranged from -0.7 to 7.08 while direct resin composites values ranged from -1.47 to 25.13 Bleaching procedures, using 40% hydrogen peroxide for 40 minutes in the surgery can be an effective method to remove stains from dental restorations so that restoration replacement as a result of discoloration may not always be necessary.

Reference: Alharbi, A., Ardu, S., Bortolotto, T. and Krejci, I., 2018. In‐office bleaching efficacy on stain removal from CAD/CAM and direct resin composite materials. Journal of Esthetic and Restorative Dentistry30(1), pp.51-58.

IMPLANTS

IMPLANTS

Why do implants fail and what can I control?

Complications in implant-supported single crowns and multiple implant-supported bridges may be mechanical, biological or technical as discussed by Hanif, A. et al., 2017. Mechanical complications include screw loosening, screw-implant fracture and cement fracture. Technical complications include fracture of the framework and of veneering porcelain. Biological complications are subcategorized into early and late implant failures. Early failures are attributed to not placing the surgical implant under proper aseptic measures and the late complications are typically peri-implantitis and infections bred by bacterial plaque.

Clinical implication: Ensure during treatment planning stage that there is no biomechanical overload. Reducing the occlusal table, preventing heavy occlusal contacts, keeping shallow cuspal heights, and by providing adequate thickness of the overlying ceramic are critical factors for success. Ensure a passive fit to an implant framework.

Practical application: The clinician must consider that implant failure can occur at every stage of the process and undertake everything possible to minimize the likelihood of failure. Mechanical and technical failures are completely within the control of the clinician and failures in either of these realms and problems should rarely be seen if adequate attention to detail has taken place.

Generally, it takes about 5 years for the peri-implant disease process to progress and exhibit clinical signs and symptoms. The provision of regular hygiene visits and self-maintenance by the patient presents a heightened risk of failure.  Implant removal is warranted if there is more than 60% bone loss following peri-implantitis and evidence of mobility.

Reference: Hanif, A., Qureshi, S., Sheikh, Z. and Rashid, H., 2017. Complications in implant dentistry. European Journal of Dentistry11(1), p.135.

 

PERIODONTOLOGY

Clinical periodontitis and obstructive sleep apnoea

Gamsiz-Isik H, etal (2017) studied compared the prevalence of periodontitis in obstructive sleep apnoea (OSA) patients versus control patients by assessing clinical periodontal parameters and gingival crevicular fluid (GCF) levels of interleukin (IL)-1β, tumor necrosis factor (TNF)-α, and high-sensitive C-reactive protein (hs-CRP); serum hs-CRP was also sampled.

Clinical implication:  The results showed that the prevalence of periodontitis in the OSA group (96.4%) was significantly higher than in the control group (75%).  Severe periodontitis prevalence was higher in the OSA group than control group and all clinical periodontal parameters and GCF levels were significantly higher in OSA patients than in controls.

Practical application: The clinician should be mindful of the higher prevalence of OSA when patients exhibit clinical periodontitis.  Referral to a sleep physician is prudent.

Reference: Gamsiz‐Isik, H., Kiyan, E., Bingol, Z., Baser, U., Ademoglu, E. and Yalcin, F., 2017. Does Obstructive Sleep Apnea Increase the Risk for Periodontal Disease? A Case‐Control Study. Journal of periodontology, 88(5), pp.443-449.

ORAL MEDICINE

Oral Medicine 1Electronic cigarettes explosion

Electronic cigarettes are a relatively new nicotine-based product with a novel delivery system.  Research suggest that e-cigarette explosion involving the oral cavity are occurring more frequently.  Harrison R and Hicklin D Jr (2016) reported that the most commonly documented injuries to the oral cavity after an e-cigarette battery explosion include intraoral burns, luxation injuries, and chipped and fractured teeth.  The largest growing population of e-cigarette users is adolescents followed by young adults.

Clinical implication:  Patient education about the risks of this product is vital.  The risks of spontaneous failure and explosion of e-cigarettes should be discussed with patients who are considering using this device.  The use of e-cigarettes compounds the negative effects of nicotine with the unknown factor of the likely harmful constituents such as aldehydes, metal, volatile organic compounds and reactive oxygen species not found in tobacco smoke.

Practical implication:  Consumers can decrease the chance of a lithium battery explosion or fire by following the manufacturer’s instructions for charging the device.  The e-cigarette device should only be charged with the charger supplied with device.

Reference: Harrison, R. and Hicklin, D., 2016. Electronic cigarette explosions involving the oral cavity. The Journal of the American Dental Association147(11), pp.891-896.

 

GENERAL DENTISTRY

General dentistry 1Prevention of dental erosion

All fluoride sources help strengthen teeth against bacterial acids that cause caries.  However, excessive exposure to dietary acids, which can result in dental erosion, presents a more aggressive level of challenge compared to caries.  Despite the fact that almost all toothpastes contain fluoride, both the incidence and prevalence of dental erosion appear to be on the rise.  Noble WH and Faller RV (2018) assessed the comparative ability of fluoride agents to protect against dental erosion.  Daily use of a stabilised stannous fluoride dentifrice was shown to provide the most effective means of protecting teeth against the increasing risk of dental erosion and erosive tooth wear.

Clinical implication: Early intervention with both preventive and minimally invasive restorative management of erosive tooth wear will help preclude the need for future extensive and costly reconstructive procedures.

Practical application:  Prevention of dental erosion begins with behavioural modifications. Patients should decrease intakes of acidic foods and drinks.  Drinks should not be sipped or swished; using a straw will decrease the contact time between acids and teeth.  Patients with gastric reflux problems should see their physicians for management strategies.  Xerostomia is the most important biologic risk factor for dental erosion.  Staying well-hydrated is important as dehydration can decrease salivary flow.  Conservative restorative care using glass-ionomer cements and composite resins may be indicated.

Reference: Faller, R.V. and Noble, W.H., 2018. Protection From Dental Erosion: All Fluorides are Not Equal. Compendium of continuing education in dentistry (Jamesburg, NJ: 1995), 39(3), pp.e13-e17.

AESTHETICS

bleached teeth

Bleaching of non-vital anterior teeth

There are very few clinical trials which compare the effectiveness of the “walking bleaching” (WB) technique and the inside-outside (IO) technique used in a short daily regimen. Lise DP etal (2018) conducted the above study over 4 weeks and then compared colour changes after 1 year.  Discoloured and endodontically treated anterior teeth received a cervical seal and were randomly divided into groups according to the technique. In the WB group, a mix of sodium perborate and 20% hydrogen peroxide were applied in the pulp chambers, sealed and replaced weekly up to 4 weeks. In the IO group, 10% carbamide peroxide was applied in the pulp chambers with a syringe and custom-fitted trays were worn for 1hr/day for 4 weeks.

Both the WB and IO techniques presented similar effectiveness and resulted in significant changes after only 2 weeks.  Regardless of technique, the bleaching of non-vital anterior teeth is still a straightforward and cost-effective aesthetic approach that is usually visible and satisfactory.

Clinical Implications:  Bleaching of non-vital teeth for 4 weeks by WI bleaching (sodium perborate & 20% hydrogen peroxide) or IO (10% carbamide peroxide, 1hr/day) resulted in visible colour changes that were stable after 1 year.

Practical application:  Patients can be confident that simple economical techniques are available for improvement of discolouration of non-vital teeth without immediate recourse to definitive treatment.

Reference: Lise, D.P., Siedschlag, G., Bernardon, J.K. and Baratieri, L.N., 2018. Randomized clinical trial of 2 nonvital tooth bleaching techniques: A 1-year follow-up. Journal of Prosthetic Dentistry119(1), pp.53-59.

 

 ORTHODONTICS

Orthodontics

The effectiveness of orthodontic/orthopaedic appliance

A systematic review by Woon SC etal (2017) evaluated the effectiveness of orthodontic/orthopaedic methods used in the early treatment of Class III malocclusion in the short and long terms.  The selection criteria included trials of children between 7-12 years undergoing early treatment with any type of orthodontic/orthopaedic appliance compared to another appliance versus an untreated control group.  The primary outcome measure was correction of reverse overjet, and secondary outcomes included skeletal and soft tissue changes, quality of life, patient compliance, adverse effects and treatment time.

Clinical implication: The results for reverse overjet and ANB angle were statistically significant and favoured the group using a facemask, however there was lack of evidence on long-term benefits. There is some evidence regarding the chincup, tandem traction bow appliance and the removable mandibular retractor but the studies had a high risk of bias.

Practical application:  Further unbiased long-term studies are required to evaluate the early treatment effects for Class III malocclusion patients.

Reference: Woon, S.C. and Thiruvenkatachari, B., 2017. Early orthodontic treatment for Class III malocclusion: A systematic review and meta-analysis. American Journal of Orthodontics and Dentofacial Orthopedics151(1), pp.28-52.

 IMPLANTS

Implants

The outcomes of immediately loaded single implants in the anterior maxilla

Stanley M etal (2017) studied the outcomes of immediately loaded single implants in the anterior maxilla.  The inclusion criteria of the study were single-tooth placement in post-extraction sockets or healed sites of the anterior maxilla.  All implants were immediately loaded and followed for a 12 mth period after definitive crowns were placed.  The outcome measures were implant stability, survival and success.  The survival rate was found to be 100% at 12mths after placement of definitive crowns and no biological complications were found.  Two implants in the study had their prosthetic abutments loosened: the implant success was 95.2%.

Clinical implication: On immediate loading of single implants in the anterior maxilla a high survival rate of 100% was reported.

Practical application: Placing implants in fresh extraction sockets can reduce the number of surgical sessions from two to only one which is compatible with inserting implants with a flapless technique and is thus minimally invasive.  The insertion of an implant into a fresh extraction socket may help the correct 3D positioning of the fixture which will benefit the emergence profile.

Reference: Stanley, M., Braga, F.C. and Jordao, B.M., 2017. Immediate Loading of Single Implants in the Anterior Maxilla: A 1-Year Prospective Clinical Study on 34 Patients. International journal of dentistry2017.

BUSINESS OF DENTISTRY

difficult patient

Dealing with difficult patients

Patient management is complex and communication is essential for practice success. Yiannikos A (2018) discussed how to manage patients who grumble.  Listen attentively to what the patient has to say and try and understand the real problem.  Ensure that the patient feels their problem is acknowledged and that it will be resolved immediately.  This could be an advice like “do not rinse for 6 hrs” or a prescription such as “Use this cream, it will reduce the sensitivity”.  Follow-up is crucial as soon as practicable to check all is in order with the patient.  Ensure that the correct questions are asked.  The dentist is the manager and the leader of the clinical team and will inspire trust and confidence of the patient when the patient’s needs are understood.

Clinical implication: Unless the patient has a keen sense of being understood by the clinical team, even the most sophisticated dental surgery will not capture the patient.  Difficult patients require careful handling and management.  Dentist must be open to interprofessional dialogue with colleagues.

Practical application: Ensure dedicated time is allotted to clarify the patients’ understanding of all areas of dentistry and their obligations to treatment and subsequent maintenance.

Reference: Yiannikos, A.M., 2017. Successful communication in your daily practice Part I: Grumbling patients. roots – international magazine of endodontics, [Online]. No. 04. Available at: https://www.dental-tribune.com/clinical/successful-communication-in-your-daily-practice-part-i-grumbling-patients/ [Accessed 22 May 2018].

PROSTHODONTICS

Prosthodontics Sleep bruxism and ceramic restorations failure

Sleep bruxism is thought to be a risk factor for the failure of ceramic restorations.  De Souza MG etal (2017) performed a systematic review to determine whether sleep bruxism is associated with failure of ceramic restorations.  Over 1,400 patients aged from 19-71 yrs were evaluated and were followed up from 12-61 mths.  The failure rates ranged from 3.1-13% and analysis showed that there were no differences in the likelihood of ceramic restoration failure when comparing patients with and without sleep bruxism.

Clinical implication: The current available evidence is insufficient to claim if there is an association between sleep bruxism and ceramic restoration failure.

Practical application:  The clinician can be confident to employ ceramic restorations in patients with sleep bruxism but it may be prudent to suggest regular use of a night splint if the patient is not currently requiring any prosthesis for sleep apnoea.

Reference: de Souza Melo, G., Batistella, E.Â., Bertazzo-Silveira, E., Gonçalves, T.M.S.V., de Souza, B.D.M., Porporatti, A.L., Flores-Mir, C. and Canto, G.D.L., 2018. Association of sleep bruxism with ceramic restoration failure: A systematic review and meta-analysis. Journal of Prosthetic Dentistry119(3), pp.354-362.

MATERIALS

MaterialsThe survival rate of ceramic inlays, onlays and overlays

Important decisions for patient consideration include the prognosis of treatment options.

The survival and complication rates of different restorative materials are critical for the dentist and patient when discussing informed consent. Morimoto S etal (2016) systematically reviewed the survival rate of ceramic inlays, onlays and overlays.  Their analysis showed that the survival rate was 95% at 5 yrs and 91% at 10 yrs and complication rates were low overall.

Clinical implication: The clinician can be confident to advise patients that the success rate of inlays, onlays and overlays if ceramic is employed as the restorative material.

Practical application: Even with the low incidence of complications, fracture or chipping of the restorations or the teeth (or both) are possible.  If the restoration is deep enough, pulpal health may be irreversibly affected, and the patient should be advised accordingly.

Reference: Morimoto, S., Rebello de Sampaio, F.B.W., Braga, M.M., Sesma, N. and Özcan, M., 2016. Survival rate of resin and ceramic inlays, onlays, and overlays: a systematic review and meta-analysis. Journal of dental research95(9), pp.985-994.

PROSTHODONTICS

Risk of posterior all-ceramic crowns failure still high

Kassardjian V et al (2016) reviewed differences in survival of complete coverage crowns with all ceramic materials used in adults to restore anterior or posterior vital teeth and opposed by teeth, implant crowns were excluded. The study reviewed 3,937 articles between 1980-2014. The ceramic materials studied were slip cast alumina, lithium disilicate, leucite-reinforced glass ceramic, pure alumina and zirconia.  Anterior ceramic crowns were 50% less likely to fail than posterior ceramic crowns.

Clinical implication: Even though bonding techniques and all-ceramic material science have improved significantly in the last 35 yrs, failure rates of posterior crowns without metallic substructures continue to be an issue of concern.  Unless in the aesthetic zone or of prime importance to the patient, consider ceramo-metal crowns as your default option.  All zirconia crowns continue to show promise but consider abrasiveness and wear to the opposing dentition.

Practical application: Based on current data, clinicians still need to be cautious about using ceramic crowns to restore posterior teeth.  Case selection, meticulous preparation and embracing ideal clinical protocols is crucial when considering using complete coverage all-ceramic materials.

Reference: Kassardjian, V., Varma, S., Andiappan, M., Creugers, N.H. and Bartlett, D., 2016. A systematic review and meta analysis of the longevity of anterior and posterior all-ceramic crowns. Journal of Dentistry55, pp.1-6.

IMPLANTS

Keratinized mucosa thickness essential for implant longevity

Roccuzzo M et al (2016) studied the presence and absence of keratinized tissue under soft-tissue conditions around the posterior mandibular implants of healthy or moderately periodontally compromised patients to understand the significance of peri-implant keratinised tissue for long-term tissue health and stability.  Lack of keratinised tissue was associated with higher plaque accumulation, greater soft-tissue recession and greater need for added antibiotic and/or surgical interventions to manage complications.

Clinical implication: Bony support of implants has been the primary focal point when considering the longevity of implant retained prostheses. Consideration of the keratinization of the mucosa needs to be factored into possible implant loss, peri-implant health, oral hygiene, soft-tissue recession and change in marginal bone levels.

Practical application: In carefully selected patients, especially in the edentulous posterior mandible, where ridge resorption leads to reduced vestibular depth and lack of keratinized tissue, peri-implant soft tissue grafting is suggested to facilitate long-term tissue health.

Implant planning involves careful assessment of not only hard tissues but consideration of soft tissue as well.  If extensive ridge resorption has occurred, consider soft tissue grafting.

Reference: Roccuzzo, M., Grasso, G. and Dalmasso, P., 2016. Keratinized mucosa around implants in partially edentulous posterior mandible: 10‐year results of a prospective comparative study. Clinical Oral Implants Research27(4), pp.491-496.

PERIODONTICS

Diabetes and periodontal health management 

Chapple IL and Genco R (2013) presented a consensus report on diabetes and systemic disease.  Severe periodontitis adversely affects glycaemic control in diabetes and glycaemia in non-diabetes subjects.  In diabetes patients, there is a direct and dose-dependent relationship between periodontitis severity and diabetes complications.  Increasing evidence supports elevated systemic inflammation resulting from the entry of periodontal organisms and their virulence factors into the circulation.

Clinical implication: Mechanical periodontal therapy is associated with approximately a 4% reduction in Haemoglobin A1c (HbA1C) at 3 mths.  HbA1c is a form of haemoglobin that is bound to glucose, the blood test for HbA1c level is routinely performed in people with type 1 and type 2 diabetes mellitus. The clinical impact is equivalent to adding a second drug to a pharmacological regime for diabetes.  No current evidence to support adjunctive use of antimicrobials for periodontal management of diabetes patients is indicated.

Practical application: One hypothesis to explain this damage in the periodontal tissues states that advanced glycosylation end products that appear in diabetic patients due to the hyperglycemia make the immune system hyper-reactive to dental plaque, increasing destruction of periodontal support.

Some patients have a more reactive immune system to oral plaque and diabetes inflammatory products, leading to more periodontal destruction in the mouth and more diabetic complications in the body.

Even though diabetic individuals have more severe periodontal disease, a successful periodontal treatment can be performed.  Elimination of plaque and calculus attached to the tooth, appropriate oral hygiene and periodontal control every 4 to 6 mths are the keys for success.  Treatment results can be improved in the short term with drug therapy but we have to keep in mind that more recurrence of periodontal disease will be observed in diabetic patients that have poor glycemic control.

Reference: Chapple, I.L., Genco, R. and Working Group 2 of the Joint EFP/AAP Workshop, 2013. Diabetes and periodontal diseases: consensus report of the Joint EFP/AAP Workshop on Periodontitis and Systemic Diseases. Journal of clinical periodontology, 40, pp.S106-S112.

DENTAL MATERIALS

Fissure sealants more effective when etched and with use of adhesive

A study by Unverdi G.E (2017) analysed 228 sealants on 57 children’s caries-free first permanent molars and compared sealant retention after the use of an adhesive with no adhesive and the performance of self-etch adhesives with traditional etch-and-rinse adhesives.

Clinical implication: Enamel etching was the key to sealant retention and that addition of an adhesive with the etching improved retention rates.

Practical application: Pit and fissure sealant is an effective means of preventing pit and fissure caries in primary and permanent teeth. Dentists should therefore be encouraged to apply pit and fissure sealants in combination with other preventive measures in patients at a high risk of caries.  Selection of sealant material is dependent on the patient’s age, child’s behavior, and the time of teeth eruption. Teeth that present with early non-cavitated carious lesions would also benefit from sealant application to prevent any caries progression.  Sealant placement is a sensitive procedure that should be performed in a moisture-controlled environment. Maintenance is essential and the reapplication of sealants, when required, is important to maximize the effectiveness of the treatment.

Reference: Unverdi, G.E., Atac, S.A. and Cehreli, Z.C., 2017. Effectiveness of pit and fissure sealants bonded with different adhesive systems: a prospective randomized controlled trial. Clinical oral investigations, 21(7), pp.2235-2243.

ORAL MEDICINE

Platelet Rich Fibrin application of huge benefit in surgical procedures

Castro AB et al (2017) reviewed the effects of platelet-rich fibrin (PRF) on surgical procedures such as sinus elevation, alveolar ridge preservation and implant surgery.

Clinical implication: Significant beneficial effects on bone regeneration and in implant surgery are suggested when PRF is applied. Given its ease of preparation, low cost and biological properties, PRF should be considered as a reliable option of treatment.  However, standardization of the clinical protocol is required to obtain reproducible results. The use of enough PRF clots or membranes seems to be crucial to obtain an optimal effect.

Practical application: PRF accelerated bone healing in sinus elevation procedures, reduced buccal plate resorption in alveolar socket healing and improved primary and secondary implant stability in implant surgery compared with controls.

Reference: Castro, A.B., Meschi, N., Temmerman, A., Pinto, N., Lambrechts, P., Teughels, W. and Quirynen, M., 2017. Regenerative potential of leucocyte‐and platelet‐rich fibrin. Part B: sinus floor elevation, alveolar ridge preservation and implant therapy. A systematic review. Journal of clinical periodontology44(2), pp.225-234.

BUSINESS OF DENTISTRY  

SEO and EDM’s

key to practice growth

Shuman L (2016) offers suggestions for improving a website’s relevance and rankings on search engines, especially in relation to promoting growth.

For a practice to thrive, patients must first be aware of the practice and also accept recommended treatments at a high rate.  This calls for effective communication both in the practice and beyond.  Use of electronic data messaging (EDM) campaigns to the patient base and social media should be used to keep in touch with existing patients and attract new ones.

Clinical implication: The practice website should feature unique content, have one key topic per page, have proper navigation and include site maps, backlinks and utilize tag optimisation.

Practical application: The use of the internet in modern practice as an educational and marketing tool is vital.  Correct presentation of material and easy-to-use practice websites are critical.

Reference: Lou Shuman. 2016. 6 Essential Elements of a Flawless Practice Launch. [ONLINE] Available at: http://pages.dentalproductsreport.com/6-essential-elements-of-a-flawless-practice-launch. [Accessed 7 May 2018].

FACIAL AESTHETICS

FACIAL AESTHETICS

Use of Botox useful to create facial harmony with aesthetic dental procedures

Cosmetic dental treatments are often not optimal due to extraoral soft tissue conditions and modalities which have been confined to intraoral treatment alone.  Roberts W and Roberts J (2017) found that Botulinum Toxin Type A (BTA) is useful in relaxing facial muscles to improve symmetry and balance and is adjunctive to aesthetic dentistry.  This treatment modality can impact significantly on the soft tissues around the mouth.

Clinical implication: The use of Botox (BTA) in conjunction with aesthetic dental procedures will help to complete a more natural and uniform appearance for patients.

Correction of prominent mandibular angle and facial asymmetry due to masseter muscle hypertrophy is becoming more common place.  Although prominent mandible angles mainly develop skeletally, it can also develop by bilateral masseter muscle hypertrophy, and facial asymmetry develops with unilateral masseter muscle hypertrophy.  In this case, a satisfactory therapeutic effect can be obtained using intramuscular BTA injections. In addition, injecting BTA into the masseter or temporalis muscle is effective in the treatment of bruxism.

Patients with TMD often experience mouth-opening limitations and BTA therapy can relax the adjacent masticatory muscles and thereby improve the muscle inflammation leading to improved mouth opening.

Practical application: Although BTA is currently the most commonly used toxin for the improvement of facial wrinkles, it has now been conventionally used in the treatment of muscular and bony facial asymmetry and TMD.

Reference: Roberts, W. and Roberts, J., 2017. Therapeutic use of Botulinum toxin. Available at:  www.ptifa.com [Accessed 7 May 2018].

 

 

ORTHODONTICS

ORTHODONTICS

Beware of diabetes in

adult orthodontic cases

More older individuals are undergoing orthodontic intervention and dentists see various patients with systemic co-morbidities, particularly diabetes as reviewed by Faruqui S et al  2018.

Poor bone turnover, encountered in diabetic patients, is a major contributing factor to bone destruction and misalignment of teeth. Diabetic patients must establish very tight control of their glycemic states and be kept under proper monitoring before getting into active orthodontic treatment.

Clinical implication: Diabetic patients who undergo orthodontic treatment while their glucose is poorly controlled had a very high risk of periodontal breakdown and the ensuing inflammation will increase the risk of unpredictable tooth movement.  Apply as light physiological forces as possible.  Diabetic patients who undergo orthodontic band placement, separator placement, or screw insertion are at high risk for developing oral infection and will require the use of prophylactic antibiotics before these procedures.  Simple adjustments do not need antibiotics.  Dentists should be aware of and ready to deal with potential diabetic emergencies that are likely to occur during orthodontic treatment.  Once early hypoglycemia symptoms are recognized, oral glucose is to be given in a dose of 50g. If the patient was unconscious, intramuscular glucagon 1mg or intravenous dextrose should be immediately infused.

Practical application: In order to avoid hypoglycemia in diabetic patients ensure the patient consumes a morning meal on the day of an orthodontic procedure. Try to schedule appointments early in the day.

Reference: Faruqui, S., Fida, M. and Shaikh, A., 2018. Factors affecting treatment duration–A dilemma in orthodontics. Journal of Ayub Medical College Abbottabad, 30(1), pp.16-21.

PROSTHODONTICS

Prosthodontics 1

Chewing efficacy: implant bridge v denture

Nogawa, T., et al, compared masticatory performance and occlusal force in mandibular conventional removable partial dentures and implant-supported fixed bridges.  In this study 44 Patients were treated at university clinic: 19 with implant-supported bridges and 25 with removable partial dentures.  Masticatory performance was measured and scanned data was subjected to computer analysis.

Clinical implication: There were no significant differences between the 2 groups with regard to oral function which measured masticatory performance and occlusal force.  More favourable subjective patient assessments of implant-supported bridges were more likely influenced by comfort and less by objective functional measures such as masticatory performance and occlusal force.

Practical application: Most dental professionals espouse the notion that implant-supported fixed prostheses deliver more efficacious masticatory function.  In relation to this study: hygiene, comfort and a sense of greater perceived well-being may be the deciding factor in whether or not a patient is offered an implant-supported partial denture or a conventional appliance.

Reference: Nogawa, T., Takayama, Y., Ishida, K. and Yokoyama, A., 2016. Comparison of Treatment Outcomes in Partially Edentulous Patients with Implant-Supported Fixed Prostheses and Removable Partial Dentures. International Journal of Oral & Maxillofacial Implants31(6).

IMPLANTS

Implants 1

Where and why do implants fail?

Del Fabbro M., et al, compared failure rates in implants that were either tilted with angulated abutments or were upright, the study involved 1992 implants on both arches.  The results showed 96% of the implants that failed within the first year had been placed in the maxilla with a larger proportion tilted beyond 10 degrees.

Clinical implication:  The maxilla typically has less bone mass than the mandible and this study supports the fact that there are higher failure rates for implants placed in the maxilla, especially with angled abutments.

Practical application:  Treatment planning must consider the higher incidence of failure rates in the maxilla and plan for sites that may need to be used at some future date and evaluate occlusal factors carefully in the design of the prosthesis.

Reference: Del Fabbro, M., Bellini, C.M., Romeo, D. and Francetti, L., Tilted implants for the rehabilitation of edentulous jaws: a systematic review. Clinical implant dentistry and related research14(4), pp.612-621.

PERIODONTICS

Periodontics 1

How many annual scaling and root planning sessions are needed and are antibiotics necessary?

Preus, HR., et al, compared 5-year clinical outcomes of scaling and root planing in a single session compared with 2 sessions, over a period of 21 days with and without the use of adjunctive metronidazole (MTZ) antibiotic therapy.  In this study, patients were divided into 4 groups:

  • Single session plus placebo;
  • Single session plus 400mg MTZ 3 times/day for 10 days starting 1 day before;
  • Two sessions over 21 days plus placebo;
  • Two sessions over 21 days plus MTZ starting 1 day before the 2nd session.

Periodontal maintenance therapy was performed to all patients at 3, 6 and 12 months and then every 6 months thereafter.

Clinical implication:  All treatments were effective in reducing signs of periodontitis. There were no meaningful clinical differences among the treatments, consequently dentists need to consider when planning treatment for patients with periodontitis.  It is pertinent to be cautious when prescribing antibiotic therapy for periodontal therapy.

Practical application:  Consistency of appointments should be the prime consideration when planning for periodontitis patients rather than relying on the use of antibiotics (with the exception of acute conditions) to minimize antibiotic resistance.

Reference: Preus, H.R., Gjermo, P. and Baelum, V., 2017. A Randomized Double‐Masked Clinical Trial Comparing Four Periodontitis Treatment Strategies: 5‐Year Tooth Loss Results. Journal of periodontology88(2), pp.144-152.

PREVENTIVE DENTISTRY

PREVENTIVE DENTISTRY

What is optimal topical fluoride regimen for arresting lesions in toddlers?

Duangthip D, et al, studied 304 young children between ages 3-4 yrs to compare the arresting ability of 3 different topical fluoride regimens on dentine caries (1670 tooth surfaces were included in this study).  Children with at least 1 active carious lesion into dentine were allocated one of three intervention groups:

Group 1:  1 application of 30% silver diamine fluoride (SDF) every 12mths;

Group 2:  3 applications (each at weekly intervals) of 30% SDF;

Group 3:  3 applications (each at weekly intervals) of 5% sodium fluoride varnish (NaF). 

Clinical implication:  After 18 months, the arrest rates were as follows:

Group 1: 40% – 1 application of SDF annually

Group 2: 35% – 3 applications (at weekly intervals) of SDF

Group 3: 27% – 3 applications (at weekly intervals) of 5% NaF varnish

This study found that annual or three consecutive weekly applications of SDF solution is more effective in arresting dentine caries in primary teeth than three consecutive weekly applications of NaF varnish.

Practical application:  Clinicians need to recognize the effectiveness of the arresting capabilities of effect of SDF as a treatment modality for caries management in paediatric patients.  Research also shows that SDF is more effective as a primary preventative than any other material, with the exception of sealants which are 10 x more expensive and need constant monitoring.

Reference: Duangthip, D., Chu, C.H. and Lo, E.C.M., 2016. A randomized clinical trial on arresting dentine caries in preschool children by topical fluorides—18 month results. Journal of dentistry44, pp.57-63.

ORAL MEDICINE

Oral Medicine 2Stopping anti-coagulants before extractions?

Doganay O., et al, reviewed 222 patients that underwent either extraction or other minor oral surgical procedures who were using anti-coagulants or antiplatelet medication.  The antiplatelet regimens included aspirin, clopidogrel, tricagrelor or dual antiplatelet therapy.

Clinical implication:  In this study the overall average frequency of postoperative bleeding was 4.9%.  The frequency of postoperative bleeding was as follows: aspirin 3.2%, clopidogrel 4.5%, tricagrelor 5.9% and dual antiplatelet therapy 8.3%.  None of the patients in this study experienced prolonged bleeding.

Practical application:  According to recommendations from published studies and guidelines, antiplatelet medications, including dual antiplatelet therapy should not be interrupted for tooth extractions or minor oral surgery.

Reference: Doganay, O., Atalay, B., Karadag, E., Aga, U. and Tugrul, M., 2018. Bleeding frequency of patients taking ticagrelor, aspirin, clopidogrel, and dual antiplatelet therapy after tooth extraction and minor oral surgery. The Journal of the American Dental Association149(2), pp.132-138.

BUSINESS OF DENTISTRY  

BUSINESS OF DENTISTRY

Your website and using SEO

Swirsky E.S. et al, discusses how dentists must demarcate themselves in their communities by hanging a so called “digital shingle”.  Techniques leveraging the ubiquitous interconnectivity of the Internet allow companies to transmit a powerful signal through the noise of the World Wide Web.  One methodology known as search engines optimization (SEO) affects the online visibility of a website.  By using SEO, patients can find information about conditions, procedures and providers through key words searches in addition to traditional marketing channels.  Ideally, advertising connects patient and provider, where patients are drawn to services aligned with their needs, and providers enhance their visibility to the public.

Clinical implication:  Market research suggests that 87% of dentists maintain some internet presence and 30% of patients say a dentist’s website influences their choice of provider.  SEO allows for inbound marketing which embraces the idea of pushing information out to customers instead of merely pulling their attention.

Practical application: Dentist’s internet marketing plan should incorporate SEO techniques that adhere to standards of professionalism.  A dentist’s website should be aimed at patient education and improving oral health, and marketers under contract must be made aware of relevant health Code guidelines and licensing issues to avoid the risk of false or misleading advertising.

Reference: Swirsky, E.S., Michaels, C., Stuefen, S. and Halasz, M., 2018. Hanging the digital shingle: Dental ethics and search engine optimization. The Journal of the American Dental Association149(2), pp.81-85.

 

ORTHODONTICS 

OrthodonticsMalocclusions in young children, can breastfeeding really reduce the risk?

Doğramacı, E.J., et al, performed a meta-analysis on 7 studies which focussed on the relationship of breastfeeding on malocclusion in young children.

They found that children who had been breastfed sub-optimally had an increased risk of developing malocclusions compared to those who breastfed optimally.  Optimal breastfeeding is exclusive, breastmilk only for 6 months, then breastfeeding with complementary feeding up to 2 years.

Clinical implication:  According to this review, young children with a history of sub-optimal breastfeeding have a higher prevalence and risk ratio for malocclusions.  These children have an increased risk of developing class II canine relationship, posterior crossbite and anterior open bite.

Practical application: Dental professionals should continue to encourage and promote breastfeeding; however, patients should be aware that children can still develop malocclusions, despite having received optimal breastfeeding, owing to the multifactorial aetiology of malocclusions.

Reference: Doğramacı, E.J., Peres, M.A. and Peres, K.G., 2016. Breast-feeding and malocclusions: the quality and level of evidence on the Internet for the public. The Journal of the American Dental Association147(10), pp.817-825.

IMPLANTS

DentalImplants_ThinkstockPhotos-493611999EDIT
Bruxers and failure rates

Chrcanovic BR. et al., (2017) reviewed a retrospective study which investigated the link between awake and sleep bruxism and the risk of implant failure and then compared bruxers with non-bruxers.  3549 implants in 994 patients were reviewed.  There were 179 implants that were registered failures (46 at abutment connection and 86 during the first year).  Implant failure rates were 13% for bruxers and 4.6% for non-bruxers.

Conclusion:  The model revealed bruxism to be a statistically significant risk factor for implant failure.

Practical application:  Bruxing patients who undergo tooth replacement with implants should be treatment planned for optimal strength at the abutment fixture interface and provided with a splint.

Reference: Chrcanovic, B.R., Kisch, J., Albrektsson, T. and Wennerberg, A., 2016. Bruxism and dental implant failures: a multilevel mixed effects parametric survival analysis approach. Journal of Oral Rehabilitation43(11), pp.813-823.

PROSTHODONTICS

abutment2

Non-vital teeth as abutments

Mizuno Y, et al., (2016) analysed the relationship between the type of edentulous spaces and tooth loss in RPD wearers.

102 consecutively treated patients with partial edentulism who were provided with RPD’s at a university-based clinic were evaluated to identify predictors of tooth loss.

Conclusion:  The presence of endodontically treated teeth at RPD placement was a significant predictor of future tooth loss.

Practical application: Avoid using endodontically treated teeth in critical retentive areas in partial denture design and plan for the possible failure of root treated teeth.

Reference: Mizuno, Y., Bryant, R. and Gonda, T., 2016. Predictors of Tooth Loss in Patients Wearing a Partial Removable Dental Prosthesis. The International Journal of Prosthodontics, 29(4), pp.399-402.

PERIODONTICS

cannabis

Cannabis side effects

Shariff JA. et al., (2017) examined the relationship between frequent recreational use of cannabis and periodontitis in adults.  Of the 1938 participants who were involved in the study, 26.8% were frequent recreational cannabis users.

Conclusion:  Bivariate analysis revealed a positive (harmful) association between frequent recreational cannabis and severe periodontitis in the entire sample as well as those who never used tobacco.

Practical application:  Educate patients who are in this high-risk category as to the implications of their habit. More frequent intervals for maintenance are advised.

Reference:  Shariff, J.A., Ahluwalia, K.P. and Papapanou, P.N., 2017.  Relationship between frequent recreational cannabis (marijuana and hashish) use and periodontitis in adults in the United States: National Health and Nutrition Examination Survey 2011 to 2012. Journal of Periodontology, 88(3), pp.273-280.

DENTAL MATERIALS

posterior composites

Longevity of Posterior Composites

Alvanforoush N, et al., (2017) compared published success rates for posterior composite restorations placed between 1995-2005 and 2006-2016.  The restorations had to be in place for at least 24 months.

The overall survival rate for the earlier and later decades were 89.4% and 86.9% respectively.  Restorations failure due to secondary caries in the earlier decade was 29.5% and in the later decade 25.7%.

Material fractures of 28.8% and tooth fractures of 3.5% were reported in the earlier decade but in the later decade, material fracture increased to 39.1% and tooth fracture had increased to 23.8%.

Conclusion: It was speculated that the increase in composite and tooth fracture was due to placing larger composite resin restorations during the latter decade.

Practical application:  Understand and respect the limitations of direct composite in larger restorations and utilize capping cusps to protect remaining tooth structure.

Reference:  Alvanforoush, N., Palamara, J., Wong, R.H. and Burrow, M.F., 2017. Comparison between published clinical success of direct resin composite restorations in vital posterior teeth in 1995–2005 and 2006–2016 periods. Australian Dental Journal, 62(2), pp.132-145.

ORAL MEDICINE

HPV

HPV Vaccine essential

Human papillomavirus (HPV) infection is a distinct risk factor for oropharyngeal squamous cell carcinoma (OPSCC) and HPV 16 is associated with most HPV-OPSCC. The incidence rates of HPV-OPSCC have been increasing for the last 3 decades. Tobacco-related head and neck squamous cell carcinoma rates are decreasing worldwide (Javadi P. et al., 2017). Herrero R., et al., (2013) published results of first randomized controlled trial showing the benefit of HPV vaccine.

Conclusion: There was a 93% vaccine efficacy in reducing oral HPV infection at 4-year follow-up.

Practical application: Patients should be screened for currency of HPV vaccine and should be mandatory on the medical history forms.

References:

  1. Javadi, P., Sharma, A., Zahnd, W.E. and Jenkins, W.D., 2017. Evolving disparities in the epidemiology of oral cavity and oropharyngeal cancers. Cancer Causes & Control, 28(6), pp.635-645.
  2. Herrero, R., Quint, W., Hildesheim, A., Gonzalez, P., Struijk, L., Katki, H.A., Porras, C., Schiffman, M., Rodriguez, A.C., Solomon, D. and Jimenez, S., 2013. Reduced prevalence of oral human papillomavirus (HPV) 4 years after bivalent HPV vaccination in a randomized clinical trial in Costa Rica. PloS one, 8(7), p.e68329.

BUSINESS OF DENTISTRY

teledent

Tele-dentistry enhances practices

Estai M. et al., (2016) explored Australian dental practitioners’ perceptions of the usefulness of tele-dentistry in improving dental practice and patient outcomes. Tele-dentistry is the remote provision of dental care, advice or treatment through the medium of information technology.  They designed a questionnaire assessing perceptions of dentists in four domains: usefulness of tele-dentistry for patients; usefulness of tele-dentistry for dental practice; capability of tele-dentistry to improve practice; and perceived concerns about the use of tele-dentistry.

Conclusion:  Most dentists agreed that tele-dentistry would improve dental practice through enhancing communication with peers, guidance and referral of new patients and improve patient management and increasing patient satisfaction. Concerns included with technical reliability, privacy, practice expenses, the cost of setting up tele-dentistry, surgery time and diagnostic accuracy.

Practical application:  Be mindful that dental technology is enhancing all aspects of dental practice. Those who do not embrace it will be left behind as patients are more and more technologically savvy and have expectations that are continually evolving.

Reference: Estai, M., Kruger, E. and Tennant, M., 2016. Perceptions of Australian dental practitioners about using telemedicine in dental practice. British Dental Journal, 220(1), p.25.

AESTHETIC DENTISTRY

toothmorph

Understanding tooth morphology

Mahn E. et al., (2017) evaluated different tooth shapes from different genders, matching them with traditional basic forms and proposed different hybrid shapes.  They also evaluated the percentage of correct gender identification of lay people, dentists and dental students.  Standardised digital photos were taken from 460 people and analyzed by 3 experts regarding genders and tooth forms: pure basic forms—oval (O), triangular (T), square (S) and rectangular (R); and combined hybrid forms—oval-rectangular (OR), triangular-rectangular (TR), triangular-oval (TO), square-oval with flat lateral incisors (SOF), and square-oval with scalloped lateral incisors (SOS).

Conclusion:  Pure forms were less prevalent in the population studied than hybrid ones and tooth gender selection among different evaluators was not significantly different.  The correlation of reported tooth shapes with specific genders was not reliably observed in natural smiles.  Pre-standardized pure tooth forms appeared less than hybrid ones, while the most frequently found in the population studied were TO, SOS and OR.

Practical application:  Tooth shapes should be selected according to patient wishes rather than by previously believed gender specific tooth shapes. Pure basic tooth forms should be complemented by adding of combination forms to more accurately portray those found in the patients’ dentition.  Listening to the expectations of the patient and utilizing digital diagnostic wax-ups will enhance final results.  Fabrication of excellent temporaries that will mimic the final restoration is encouraged.

Reference: Mahn, E., Walls, S., Jorquera, G., Valdés, A.M., Val, A. and Sampaio, C.S., 2017. Prevalence of tooth forms and their gender correlation. Journal of Esthetic and Restorative Dentistry.

ORTHODONTICS

mandibularadvancementspling

Changes to occlusion with use of advancement splints in apnoea

Doff M.J.H. et al., (2017) selected 51 patients  randomized to oral appliance therapy and 52 patients to CPAP therapy for treating mild to moderate sleep apnoea.  At baseline and after a 2-year follow-up, study models in full occlusion were analysed with respect to relevant variables.

Conclusion: Long-term use of an oral appliance resulted in small but significant dental changes compared with CPAP.  In the oral appliance group, overbite and overjet decreased respectively.  Furthermore, a significantly larger anterior–posterior change in the occlusion in the oral appliance group compared to the CPAP group. Both groups showed a significant decrease in number of occlusal contact points in the (pre)molar region.

Analysis revealed that the decrease in overbite was associated with the mean mandibular protrusion during follow-up. Oral appliance therapy should be considered as a lifelong treatment, and there is a risk of dental side effects to occur.

Practical application:  The patient should be informed of possible consequences of oral appliance therapy and this should be included in the consent process.

Reference:  Doff, M.H.J., Finnema, K.J., Hoekema, A., Wijkstra, P.J., de Bont, L.G.M. and Stegenga, B., 2017. Long-term oral appliance therapy in obstructive sleep apnoea syndrome: a controlled study on dental side effects. Clinical Oral Investigations17(2), pp.475-482