Comparison between cobalt-chromium and dental d-acetal resin clasps [in vitro study]

The aim of this study is to evaluate and compare between the mechanical properties of Cobalt-chromium alloy and Acetal resin clasps. Tensile strength and transverse strength tests were performed on 10 specimens from each material using computerized testing system model LRX plus. The Vicker's hardness test was also performed following embedding the fractured transverse specimens in epoxy resin. The results revealed statistically significant differences in ultimate tensile strength, yield strength, percentage elongation, and modulus of elasticity between the tested specimens. The Dental D-Acetal resin group showed higher value than the other metallic group as regards the transverse strength and Vicker's hardness. Dental D Acetal resin is highly versatile material that can be used to replace cobalt-chromium clasps because of its superior aesthetic, physico-mechanical, and biocompatible properties