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Restorative Dentistry

Are there morphological and structural changes in the enamel as a consequence of dental bleaching?

This summary is based on the article published in Materials Letters: New approach to determine the morphological and structural changes in the enamel as consequence of dental bleaching (February 2015) I. Izquierdo-Barba, C. Torres-Rodríguez, E. Matesanz, M. Vallet-Regí         Context Dental bleaching is commonly carried out to correct discolouration of anterior teeth. Most bleaching agents are strong oxidizing agents and the most popular bleaching agent includes hydrogen peroxide (1). Although this bleaching agent is highly effective in lightening tooth colour, concerns have been expressed regarding to associated post-bleaching complications including alteration in the surface morphology of enamel ...

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Powered/electric toothbrushes vs. manual toothbrushes: which is better for maintaining oral health? A systematic review

This summary is based on the Cochrane Systematic Review: Powered/electric toothbrushes compared to manual toothbrushes for maintaining oral health (June 2014) Yaacob M, Worthington HV, Deacon SA, Deery C, Walmsley AD, Robinson PG, Glenny AM Context Good oral hygiene, through the removal of plaque (a sticky film containing bacteria) by effective tooth brushing has an important role in the prevention of gum disease and tooth decay. Dental plaque is the primary cause of gingivitis (gum inflammation) and is implicated in the progression to periodontitis, a more serious form of gum disease that affects the tissues that support the teeth. The ...

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Is octenidine hydrochloride available and/or recommended as an oral rinse agent?

This question was submtted by general dentist: Since Octenidine Hydrochloride seems better than Chlorhexidine, is it available and/or recommended as an oral rinse agent?  Under what name can it be purchased? Drs. Archie McNicol and Suham Alexander provided this quick initial response.   Antiseptic mouth rinses are used clinically to improve dental health and/or to prevent infections arising from oral pathogens. Antimicrobial mouth rinses target predominantly Streptococcus mutans.  Octenidine hydrochloride (Octenisept) belongs to a class of chemicals called bispyridinamines and was initially developed for use as a topical antimicrobial agent. It is capable of forming complexes and adhering to whole cells ...

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Is there a benefit for the routine use of an antibacterial mouth rinse prior to dental appointments?

This question was submitted by a general dentist: Is there any evidence of benefit for the routine use of an antibacterial mouth rinse (ie. chlorhexidine gluconate 0.12%) prior to dental appointments?  Would there be any contraindications to this practice? Drs. Gordon Schwartz from Gumdocs and Suham Alexander provided this quick initial response.      The intended aim of having patients use a pre-procedural antibacterial mouth rinse is to reduce or limit the exposure of patients and dental staff to microorganisms that are found in aerosols in the dental office as well as to decrease contamination of equipment and operatory surfaces ...

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What are the possible ways of reducing dental erosive potential of acidic beverages

This summary is based on the article published in the Australian Dental Journal: Possible ways of reducing dental erosive potential of acidic beverages (September 2014) T Stefański, L Postek-Stefańska Context Frequent consumption of acidic beverages is related to excessive tooth wear, namely dental erosion. Preventive measures may involve reduction or elimination of acidic drink consumption. However, the success of this approach is difficult to achieve as it is highly dependent on patient compliance. Therefore, a practical way of minimizing the erosive potential of popular acidic drinks may be their chemical modification. Purpose of the Review The aim of this article ...

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Are there any detrimental effects of tooth-whitening agents on enamel?

This question was submitted by a general dentist: Are there any detrimental effects of tooth-whitening agents on enamel? Some have shown increased microfracture in the enamel seen only under SEM; however, is it clinically relevant? Dr. Laura Tam, from the Faculty of Dentistry at the University of Toronto, and Dr. Suham Alexander provided this quick initial response     Tooth whitening has become an increasingly popular esthetic service for patients and is well-integrated in dental practices. At-home whitening with carbamide peroxide and hydrogen peroxide (H2O2) was originally part of a complete dental procedure which included the dentist examining the patient ...

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What is gutta percha and how did it come to be used in dentistry? An interview with Dr. Mary Dabuleanu

Dr. Suham Alexander, Oasis Clinical Editor, interviewed Dr. Mary Dabuleanu, Endodontist at Dabuleanu Dental about the history of gutta percha and its use in dentistry.                 Listen to the Audio Interview (11 mins)   References Jeon KA, Lee IB, Bae KS, Lee WC, Baek SH. Measurement of thermal expansion characteristic of root canal filling materials : Gutta-percha and Resilon. J Kor Acad Cons Dent. 2006;31(5):344-351. doi: 10.5395/JKACD.2006.31.5.344.   Khatavkar RA, Hedge V. The weak link in endodontics: Gutta-percha – A need for change. World J Dent. 2010;1(3)217-24. Shipper G, Ørstavik D, Teixeira FB, Trope M. An ...

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Who should do the post-endodontic restoration – the restorative dentist or the endodontist?

This question was submitted by a general dentist: Who should do the post-endodontic restoration – the restorative dentist or the endodontist? Drs. Stephen Ferrier, Manny Friedman, and Suham Alexander prepared the following response The most important aspect of the post-endodontic restoration is establishing a sound coronal seal to prevent re-infection of the root canal system and to protect the weakened tooth from mechanical failure. Ideally, this should be completed when the endodontic obturation is done. Whether or not this is the ‘final’ or ‘ultimate’ restoration depends upon the tooth. The coronal seal may take the form of a: Core (including postless ...

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