Improving bonding of acrylic teeth to self-polymerizing denture base resins

This investigation evaluated the effect of different surface treatment of the tooth ridge lap surface on the strength of the tooth/denture base interfacial bonding. The surface treatment regimens investigated were: microblasting, coating with a solventbased adhesive and a combined microblasting and adhesive coating of the ridge lap surface. All tests were conducted according to the ADA specification No. 15. The data were analyzed statistically using the one-way analysis of variance (ANOVA) and Scheffe test. A value of p < 0.01 was considered significant. Roughening the tooth ridge lap surface by microblasting resulted in significantly stronger bonding to denture base than untreated ridge lap surface (p = 0.001). Adhesive-coating the ridge lap surface did not promote bonding significantly compared with the untreated tooth surface (p = 0.500). The combination treatment did improve bonding (p = 0.007) but was significantly less compared with roughening the ridge lap only. Of the three evaluated surface treatment regimens, microblasting the tooth ridge lap surface seemed to have a major and significant contribution to establishing a satisfactory interfacial bonding