This question was submitted by a general dentist: My patient requests that her tooth-coloured restorations be free of BPA and estrogen-mimicking agents. Can you suggest any tooth-coloured materials and cements that meet those criteria? Dr. Omar El-Mowafy, Professor and Head of the Restorative Dentistry at the University of Toronto, provided this quick initial response: Bisphenol A (BPA) is an organic compound with the chemical formula (CH3)2C(C6H4OH)2. It is widely used in the industry when making plastic products. Tooth-colored restorations that are Bisphenol-A-free would automatically exclude almost all resin composite restoratives and their corresponding bonding agents. Therefore, in this case the ...Read More »
How is the “Dahl appliance” used in the treatment of severely worn maxillary anterior teeth prior to reconstruction?
This question was submitted by a general dental practitioner: Does anyone have experience with the “Dahl appliance” used in the treatment of a severely worn maxillary anterior teeth prior to reconstruction? Dr. Effrat Habsha, Prosthodontist at Prosthodontic Associates offered this quick initial response: The Dahl Concept and the Dahl Appliance The Dahl Concept refers to the relative axial tooth movement that is observed when a localized appliance or localized restorations are placed in supra-occlusion and the occlusion re-establishes full arch contacts over a period of time. This concept can be achieved with a Dahl appliance, which refers to any interim restoration or prosthesis ...Read More »
Can there be many more stressful occasions during a busy day at your office than when an emergency dental trauma case shows up unexpectedly requiring immediate treatment? You are already running behind and the patient (and often the parent) is crying and upset. You don’t deal with this type of case every day, and you are concerned about putting a foot wrong “under the spotlight.” What do you do next? Having consulted with some eminent experts in the field of pediatric dentistry, I have no hesitation in recommending the Dental Trauma Guide website to you as an excellent “at the fingertips” resource ...Read More »
This question was submitted by Dr. Stephen Abrams from Cliffcrest Dental. Dr. Abrams is seeking colleagues’ opinions about the best approach to the video case that is presented below. Readers are invited to comment on this initial response and provide further insights by posting in the comment box which you will find by clicking on “Post a reply” below. You are welcome to remain anonymous and your email address will not be posted.Read More »
What are the advantages and disadvantages of self-adhesive resin cements for crown & bridge cementation?
This question was submitted to us by a practising dentist: What are the pros and cons of self-adhesive resin cements (i.e.: RelyX, Unicem 2) and resin modified glass ionomers (i.e.: FujiCEM 2) in crown and bridge cementation? Are they equally reliable? Dr. Omar El-Mowafy, Head of Restorative Dentistry at the University of Toronto provided this initial response: Advantages of self-adhesive resin cements 1. Eliminate the need for etching tooth structure or application of primer/bonding agent; and as a result, dramatically reduce the potential for post-operative sensitivity . 2. Dual-cured: excess cement can be briefly light-cured for ease of use. When used with a ...Read More »
From Dr. Berge Wazirian, Prosthodontist, Clinique de Prosthodontie & McGill University With the advancement of dental technology, dentists today are confronted with many different options when it comes to choosing a material for fixed partial dentures (FPDs). The wide array of materials range from multilayered systems to monolithic systems. Monolithic methods include: 1. Full contour metal restorations 2. Full contour zirconia restorations 3. Full contour lithium disilicate restorations (i.e. E.max) 4. Full contour Lucite reinforced restorations (i.e. Empress) Multilayered methods include: 1. Ceramo-metal restorations 2. Ceramo-zirconia restorations 3. Layered lithium disilicate restorations (i.e. E.max) 4. Alumina based restorations (i.e. In ...Read More »
A case of failing implants and crowns; how would you manage the aesthetic challenge? Un cas de défaut implants et des couronnes; comment voulez-vous gérer le défi esthétique?
Crowns on teeth #1.1 and 2.1 are overcontoured and failing. The mini-implants in the 1.2 and 2.2 areas have failed. How will you manage the aesthetic challenge? See the question video below (bilingual videos this week) followed by a review of the case by Dr. Wazirian in the next video. Please leave us your comments about what you would do. Couronnes sur dents # 1.1 et 2.1 sont surcontour et défaillants. Les mini-implants dans les zones 1,2 et 2,2 ont échoué. Comment allez-vous gérer le défi esthétique? Voir la vidéo question ci-dessous (vidéos bilingues cette semaine) suivie d’un examen du ...Read More »
Is Atraumatic restorative treatment an option for restoring occlusoproximal caries lesions in primary teeth?
Have you seen this article? Is Atraumatic restorative treatment an option for restoring occlusoproximal caries lesions in primary teeth? A systematic review and meta-analysis. Read more: http://www.mdlinx.com/dentistry/news-article.cfm/4306281/teethocclusoproximal-caries#ixzz2DiZMfmIeRead More »