Influence of Water Immersion Period on Mechanical Properties of Photocured TEGDMA

Abstract

The effect of immersion period in water on mechanical properties of photocured TEGDMA was studied to explain the relative lack of long-term adhesive durability of photocured TEGDMA bonding liner to dentin. The specimens, made of TEGDMA with NPG or EDMABA as a reducing agent, were immersed in water at 37℃ for 1 day to 1 year. Alteration of compressive strength and diametral tensile strength, and amount of water sorption, residual monomer and pendant double bond were measured. Compressive strength and diametral tensile strength decreased with increased immersion time due to water sorption.