title: The strength of multilayer and repaired composite resin.
abstract: Composite resin surfaces that formed against a plastic matrix or that polymerized while exposed to air were excellent substrates for the adhesion of new resin. Samples formed by the addition of composite resin to a cut surface had a tensile strength of one half of the cohesive strength of the resin. Coating the cut surface with a thin layer of unfilled resin enhanced bonding of the second composite resin layer. The use of a thin layer of unfilled catalyst resin as a bonding agent caused the most rapid development of strength and the greatest strength in samples tested after 7 days.
mesh_terms: D000268:Adhesiveness; D003188:Composite Resins; D001840:Dental Bonding; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D003188:Composite Resins