Abstract
Abstract: Objective: This study was conducted to evaluate the porosity of a thermoplastic nylon denture base material and comparing it with conventional heat-cured acrylic resin. Material and methods: Two different types of commercially available denture base materials were used in this study. Group I: Heat cured acrylic resin denture base material . Group II: Thermoplastic nylon denture base material. Specimen Preparation:Metal Pattern Preparation According to ADA specification NO.12, and Astem D256, (1985, 1988), and BS specification2482, the following five metal patterns were constructed for acrylic resin specimen’s preparation: Rectangular shaped metal pattern of 65 mm x 10 mm x 2.5 mm , length, width and thickness, respectively, were constructed to test transverse strength, porosity and surface hardness. Results: The t-test showed that the thermoplastic nylon has a lower significant mean value than the conventional heat-cured acrylic resin (P-value > 0.05). Conclusion : Thermoplastic material was more porous than the conventional one. Keywords: thermoplastic resin, acrylic resin ,complet denture,porosity.
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