Comparison of Microleakage of Composite Resin Veneering Systems at the Alloy Interface.

摘要

The lack of adhesion of acrylic resin to the metal of the resin veneer restoration required methods of mechanical retention. Poor color stability due to percolation of oral fluids at the metal-resin interface and breakdown of the acrylic resin were factors that have limited the acceptance and widespread use of this restoration. These were due to a high differential in coefficients of thermal expansion between the resin and metal, high water sorption, and high polymerization shrinkage. Several new methods of retention have been developed to improve adhesion of the composite resin to metal. In addition, improvements made in composite resins make the composite-resin veneer restoration a viable solution when the metal-ceramic restoration is contra-indicated. (jes)