Effects of Thermocycling on Some Properties of Polyamide Resins in Comparison with Polymethyl Metacrylate
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https://doi.org/10.5281/zenodo.7388198Keywords:
Polyamide, Denture Base, ThermocyclingAbstract
Increasing number of products is marketing as flexible, polyamide denture base materials. However, there is limited scientific investigation supporting the application of these materials and studies are needed for the clinical usage of these materials. The aim of this study was to compare these polyamide denture base materials with conventional PMMA. In this research, four PA based denture base materials (Bre-flex, Tcrystal, Valplast, Deflex) as an alternative of conventional denture base resin material (Meliodent, Heat Cure) were examined by in vitro evaluating the contact angle, surface roughness, water sorption and solubility, microbial adhesion of C.albicans and S.mutans before and after thermocycling procedure. Polyamides showed statistically significant differences among the groups for contact angel, surface roughness. After TC except one PA group, contact angle decreases in all groups; surface roughness decreased in PMMA group while PA groups exhibited increased and decreased Ra values. From the results obtained, both conventional PMMA and PA materials are acceptable for one-year use, as a denture base materials. It can be concluded that polyamide denture base resins will be a good alternative to conventional poly(methyl methacrylate) resins for long-term provisional removable dentures. However careful case selection and clinical judgment is required to use polyamide dentures in appropriate situations in order to obtain a successful treatment outcome.
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