An evaluation of different composite resin systems finished with various abrasives
Article Abstract:
Materials used in dental restoration should have as smooth a surface as possible, in order to prevent such undesirable consequences as plaque retention and discoloration. An objective instrument, the Surfanalyzer-4000 from Federal Products Corporation, was used to measure the smoothness of different dental composite resins when they were prepared with different abrasives and polishing systems. The materials were prepared on glass slides in accordance with their respective manufacturers' recommendations. Results showed that the size of the particles in the original composite had no effect upon the final smoothness. In the polishing procedures, differences were observed in the early, coarser stages of polishing, but the systems from different manufacturers tended to converge on the same final smoothness towards the completion of the procedures. No single system stood out as remarkable or clearly superior in the production of a smooth finish. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1989
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Assessing the effect of composite formulation on polymerization stress
Article Abstract:
Dental resins that have less inorganic filler will created lower levels of polymerization stress when place in a tooth cavity. Polymerization stress occurs when the resin polymerizes as it hardens. This makes the resin shrink slightly, which creates stress inside the tooth. The filling can become detached from the tooth, leading to recurrent cavities. A methacrylated derivative of styrene-allyl alcohol (MSAA) produces 30% less polymerization stress compared to other resins.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 2000
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