Abstract
In case of temporary treatment of missing teeth, resin teeth are fixed adhesively to the remaining adjacent teeth as pontic using self-curing resin. The improvement of adhesion technique recently has brought a longer period of service to this prosthesis. However, the elongation of periodin service provoked the serious abrasion of resin teeth, which caused the complete loss of anatomicform. The most effective method to prevent the abrasion is the use of composite resin teeth.However, the labial surface of the tooth is constructed with highly crosslinked polymer, and it isdifficult to achieve the durable bond with adhesives.
In this study, bonding of composite resin teeth were evaluated with three kinds of treatedsurfaces and two self-curing resin adhesives. Adhesion specimens were constructed and a shear testwas performed after 20, 000 thermocycles.
For two types of composite teeth with untreated surface, separation occurred during thermocycling.Trial composite tooth showed bond strength of 14.3 MPa after thermocycling. Aluminablasting treatment improved the adhesiveness effectively, giving the highest bond strength of 30.6MPa between Superbond C & B and trial composite teeth. Superbond C & B showed higher bondstrength than traditional BPO-amine self-curing resin.
