Abstract
The bonding ability of bonding agents and composites from three manufacturers, which have both chemically and visible light activated systems, were evaluated by measuring the contraction gap width between the material and the cavity wall in a dentin cavity.
The visible light cured composites were inferior to the same manufacturer's chemically cured composites in marginal adaptation to a cylindrical dentin cavity. However, the adaptation of composites to the cavity wall was improved when the light cured bonding agent was polymerized prior to the placement of chemically cured composite resin.
