Evaluating the longevity of restorative materials that seal the root canals of overdenture abutments
Article Abstract:
Silver fillings and composite restorations used to seal the root canal openings in teeth that support overdentures appear to last longer than glass ionomer cements. Between October 1981 and October 1993, researchers placed silver fillings and composite resin or glass ionomer restorations in the teeth that support overdentures in 78 people. The average lifespan of the restorations before replacement due to loss, fracture, wear, or cavities was significantly shorter in glass ionomers than in silver fillings or composite materials. Patients who had glass ionomer restorations, bleeding on probing, and a history of cavities were more likely to need their restorations replaced than patients without these characteristics. Silver fillings and composite restorations tended to fall out because recurrent cavities reduced the supporting tooth structure. Glass ionomer restorations tended to fall out because the restoration broke down.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1995
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A clinical evaluation of a resin-modified glass ionomer restorative material
Article Abstract:
Resin-modified glass ionomer or hybrid compomer restorative material appears to be comparable to composite resins one year after placement. Researchers evaluated the clinical performance of compomer liners and compared compomer restorations with composite resin restorations. Seven of the 40 patients who received compomer liners to protect the dental pulp underneath fillings reported temporary, mild tooth sensitivity one week after placement. One patient experienced continued tooth sensitivity throughout the year-long study. Compomer and composite restorations had similar ratings for retention, marginal adaption, surface texture, and anatomic contour. Composite resins matched the natural tooth color better than compomers at initial placement, although the color match was similar among both materials at the one-year follow-up.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1995
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Evaluating the antagonistic wear of restorative materials when placed against human enamel
Article Abstract:
Composite resin fillings that contain zirconium silicate or quartz may produce greater enamel wear on the opposing back teeth than barium silicate or microfilled composite resins. Researchers applied mechanical force to enamel samples that were opposed by 10 brands of composite resin. Zirconium silicate and quartz-filled composite resins produced significantly greater enamel wear compared to composite resins filled with barium silicate or microfill. Restorative material wear was greatest in the zirconium silicate and quartz-filled composite resins. The worn surfaces of the zirconium silicate and quartz-filled resins were very course while the worn areas of the restorations that contained microfill or barium silicate were smooth.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1996
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