การปรับปรุงคุณสมบัติเชิงกลของวัสดุฐานฟันปลอม ที่ทำจากพอลิเมทิลเมทาคริเลตโดยใช้เส้นใยเสริมแรง / นิรุต ครามแสง = Improvement of mechanical properties of denture base material made from polymethylmethacrylate by using reinforcing fibers / Nirut Khramsaeng
The aim of this research is to study the mechanical properties of denture base material made from PMMA using polyester fiber as a reinforcing material. The length of fiber, the amount of fiber and pattern of fiber were varied to find out the suitable condition to enhance the mechanical properties. The study has shown that PMMA with 3% by weight of 15 mm fiber shown the highest impact strength compared to PMMA added 3%, 2%, and 1% by weight of 10 and 5 mm fiber. However, the addition of fiber resulted to the flexural properties of composite materials being lower than that of pure PMMA. This could be attributed to that the interface adhesion between fiber and matrix is worse after adding fiber. Furthermore, as the result of etching fiber, this can increase the flexural properties by 10% (in case of 15-mm.-fiber length and 3% by wt). The impact properties of two-layer-orientation composites is higher than that of single-layer orientation composite. The short fiber is easier to use than long fiber especially in dental application.