Objectives: Despite of progress of denture base resin and artificial tooth materials, falling of artificial tooth from denture base after denture delivery is one of the common incidents in the clinic presently.  This study examined the durability of adhesive primer (Surface Liner, Nissin Dental Product INC. Kyoto, Japan) developed exclusively for heat-curing resin on the adhesive strength of heat-curing denture base acrylic resin to plastic artificial tooth.  Methods: Polished surface (# 1,200) of basal part of plastic artificial tooth was prepared for bonding surface of the specimen.  They were divided into 4 groups according to treatment manners for bonding surface; adhesive primer application [P], air abrasion [A], adhesive primer application after air abrasion [PA], pretreatment (# 1,200) [C] (for control).  Surface of A was prepared by sandblasting pretreatment surface with 50 micrometer aluminum–oxide particles.  Surface of P was prepared by painting adhesive primer to pretreatment surface.  Surface of PA was prepared by painting adhesive primer to the surface prepared with same manner for A.  After heat-curing of acrylic resin (2 mm thick and 3.6 mm in diameter, Acron, GC Corp, Tokyo, Japan) onto bonding surface, the shear bond strength between heat-cured acrylic resin and plastic tooth was measured using a universal testing machine with 0.5 mm/minute crosshead speed after 24-hour water storage and 100-day water storage.  Statistical analyses were done by Two Way Analysis of Variance with Tukey-Kramer test (p<0.05, S: significantly difference.  Means with the same letters were not significantly different).  Results summarized (Mean (S.D.), n=10).

Results:

Conclusion: Adhesive primer examined in this study was significantly effective to increase adhesive strength between artificial tooth and acrylic resin, even though specimens were stored in water for 100 days.