Abstract
The purpose of this study is associated to the investigation of the acrylic teeth denture base resin interface with invasive tests such as tensile testing. 30 large size artificial acrylic first upper molars (Spofadent Plus_Spofa Dental) were milled to 30 acrylic cylinders. The cylinders were randomly assigned in three experimental groups, so that 10(ten) cylinders were distributed to each one of the three (3) experimental sample groups. The bonding flat surfaces of the cylinders were submitted to a different treatment: Group 1: (control group_without treatment), Group 2: Benzene, Group 3: Toluene. For the chemical treatment procedures, organic solvents with 98.9% chemical purity were used. The bonding test samples were realized according to ADA specification No. 15, using a self-cured denture base repair resin (Duracryl–Spofa Dental, Kerr Company). Each sample was stored for 30 days in distilled water and in tensile tested at 1 mm/min speed. The mean values of the tensile bond strength test registered were statistically significant among groups, ranging from 26.5 MPa (group 1) to 23.13 MPa (group 3). The results of this study suggest the fact that the chemical treatment with the mentioned organic solvents improves not in a significant manner the adhesion of the acrylic teeth to the denture base resin.
Keywords: acrylic teeth; benzene; bond strength; methyl methacrylate; poly (methylmethacrylate); tensile testing; toluene