[ invitro evaluation of the impact of acid food- simulating liquids on surface characteristics [roughness- hardness] of two composites and one polyacidmodified composite [compomer]]

ABSTRACT

Background: The clinical use of composite and polyacid modified composite restorative materials has greatly increased over the last few years. The chemical environment is one aspect of the oral environment which could have influenced the degradation of composite resins. The aim of this study is to evaluate the effect of acid food-simulating liquids on surface characteristics [Roughness and Hardness] of two composites and one polyacid modified composite