Abstract
The adhesion fixed partial denture applied resin teeth as pontic, i.e., adhesionpontic bridge, is effective prosthodontic treatment to conserve the tooth substrate of intact abutment teeth.The purpose of this study was to improve the bond strength and durability between adhered pontic applied composite resin teeth and abutment teeth. At first, the bond strength of resin teeth pontic bonded to extracted human teeth with two self-curing resin adhesives were measured after thermocycling test up to 50, 000 times, and the specimen bonded with Super-Bond C & B showed higher bond strength than with Enamagic. However, the bond strength with Super-Bond C & B after thermocycling 50, 000 times decreased to about30% of the value before thermocycling, and the failure of all specimens occurredat the adhesion interface between composite resin teeth and Super-Bond C & B.Then some methods to reinforce the bonding durability of Super-Bond C &B to composite resin teeth were evaluated. The highest bond strength was obtained in the specimen with the hole in the proximal plane of composite resin teeth.The results suggested that the combination of mechanical retention and bond applied resin adhesives is effective to achieve the durable bond and lengthen thelife of adhesion pontic bridge.
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