Abstract
Deterioration of relining resins by exposure to thermal cycling was evaluated.The test materials consisted of self-curing, light-curing denture base relining resins and heat-curing denture base resin.After polymerization, the materials were exposed 10, 000 times to thermal cycling at a temperature ranging from 4℃ to 60℃.The same kinds of resins immersed in distilled water at 37℃ for 14 days were also examined.The surface roughness, gloss, color tone, knoop hardness, contact angle, abrasion resistance and bacterial adherence were examined.The materials were also observed by scanning electron microscopy The surface roughness, gloss, color tone, abrasion resistance, bacterial adherence of the resins exposed to thermal cycling were more affected than those of resins immersed in distilled water, particularly, those of self-curing resins.
