Year : 2018

Volume : Volume 9

Issue : Issue 3s

Address for correspondence :
Dr. N. Raja Reddy.
nagamraja@gmail.com

Abstract

Background:  To evaluate the effect of different surface treatments of acrylic teeth on shear bond strength of injection molded denture base material. It also determined the influence of retentive grooves, airborne particle abrasion and the chemical treatments (Ethyl acetate & Cyanoacrylate) on shear bond strength between acrylic teeth to injection molded denture base material. Materials & Methodology: Hundred wax samples made by using the putty index by pouring the melted wax in the putty index. After cooling, the wax patterns retrieved from the putty index. A total of 100 acrylic teeth (Acryrock) divided into different groups depending on the surface treatments (horizontal grooves, Abrasion by 50µm Al2O3, Ethyl acetate, Cyanoacrylate) on the ridge lap surface of the acrylic teeth. These wax patterns are attached through sprues and invested in the IVOCAP flask, and dewaxing is done using Electronic Dewaxing bath at 850c for ten minutes, and curing is done. The obtained 100 acrylic samples tested for shear bond strength between samples and denture base materials using 50 KN universal testing machine. Results: The results showed that the ethyl acetate surface treated group had significantly superior shear bond strength to the denture base resin when compared with cyanoacrylate surface treated teeth, mechanical groove prepared teeth, sandblasted teeth and control group. Conclusion: Among the test specimens, the shear bond strength and surface treatments between acrylic resin teeth with injection molded denture base resin was superior to the ethyl acetate group. Keywords: Surface treatments, Shear bond strength, Injection molded denture base material (SR-Ivocap high impact material) and Acrylic resin teeth.