Complete marginal seal of Class V resin composite restorations effected by increased flexibility.
The use of adhesive resin composites for restoration of Class V lesions often results in cervical marginal gap formation due to polymerization contraction. In this laboratory study, flexible linings applied between the bonding agent and the bulk restorative appeared to preserve the marginal integrity of Class V restorations during curing. Measurements of the polymerization contraction stress showed 20 to 50% relief due to various flexible intermediate materials. Apparently, reduction of the total stiffness by application of an intermediate layer can render the total restoration sufficiently flexible to compensate for that part of the stress that would otherwise exceed the bond strength.
Kemp-Scholte
C M
CM
Department of Clinical Materials Science, ACTA, University of Amsterdam, The Netherlands.
Davidson
C L
CL
D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate; D002417:Cattle; D003188:Composite Resins; D003736:Dental Cavity Lining; D003738:Dental Cements; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements; D019279:Resin Cements; D013499:Surface Properties
D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; D019279:Resin Cements; D017438:Bisphenol A-Glycidyl Methacrylate; C037885:Fuji-ionomer; C041330:Scotchbond