Effect of thermal and mechanical load cycling on the marginal integrity of Class II resin composite restorations.
Class II cavities were prepared in extracted human teeth and adhesively restored with one of three different composite systems. Also, for each system samples were made with a light-cured glass ionomer base. Marginal integrity was measured by dye penetration and SEM observation before and after stressing the samples with thermal and mechanical load cycling. Before loading, the bond system in combination with acid etching the dentin provided superior results. Loading did not significantly affect marginal integrity in light-cured glass ionomer lined samples. This was in contrast to unlined resin dentin bonding system/resin composite restorations where loading did deteriorate marginal integrity significantly.
Davidson
C L
CL
Department of Dental Materials Science, Academic Center for Dentistry Amsterdam (ACTA), The Netherlands.
Abdalla
A I
AI
D000134:Acid Etching, Dental; D000180:Acrylic Resins; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D003736:Dental Cavity Lining; D003763:Dental Leakage; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011140:Polyurethanes; D019279:Resin Cements
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D011140:Polyurethanes; D019279:Resin Cements; C065771:P50 composite resin; D017438:Bisphenol A-Glycidyl Methacrylate; C072674:Clearfil Posterior