ISSN 0975-8437 INTERNATIONAL JOURNAL OF DENTAL CLINICS 2010:2(4): 41-45

Effect of conventional and microwave curve on bond strength between denture base resin and acrylic teeth with different surface treatments R.S.Gugwad, Sharanbasappa Nagaral Aims: To determine tensile bond strength between denture base and acrylic teeth cured by conventional and microwave energy methods. Materials and Method: Ninety test specimens were fabricated from aluminum rod. It had dimension of 75 mm length 7.5 mm diameter at tooth end and 12mmdia at holding end for a length of 7.5 mm. Specimens were divided into 6 groups of 15 specimens each depending on surface treatment and curing method followed. Group A, B and C was cured by conventional method and Group D, E & F were cured by microwave energy. In Group B & E monomer was applied on ridge lap surface of the denture teeth and in Group C and F the ridge lap surface of denture teeth were sandblasted. Tensile bond strength was tested m a digital display U.T.M. (Universal Testing Machine). Results: The mean bond strength of 6 groups differ significantly F=9.36 P<0.001. The coefficient of variation is not statistically significant with each other groups. Conclusion: Conventionally cured specimens with sandblasting of ridge lap surface of the denture tooth showed less bond strength than the microwave cured specimens with same surface treatment