玻璃纤维增强新型不饱和聚酯树脂桩核的研究

Study of a newly developed unsaturated polyester-based resin post reinforced with high-strength glass fibers

目的:研究高强度玻璃纤维增强新型不饱和聚酯基树脂(unsaturated polyester,UP)桩核的制作方法及机械性能的测试。方法:1合成不饱和聚酯树脂后注入连续高强度玻璃纤维,合成玻璃纤维增强不饱和聚酯树脂桩核。2制作出长度19mm,直径13mm的玻璃纤维增强不饱和聚酯树脂桩核9支。3测试玻璃纤维增强不饱和聚酯树脂桩核的机械性能,包括弯曲强度、弹性模量。结果:玻璃纤维增强不饱和聚酯树脂桩核的弯曲强度1060MPa,弹性模量27.7GPa,与牙本质的弹性模量相近似。结论:玻璃纤维增强不饱和聚酯树脂桩核具有良好的机械性能。再进一步的临床生物安全检测后,玻璃纤维增强不饱和聚酯树脂桩核将可应用于临床。

Objective： To develop a method of fabricating a new unsaturated polyester （UP）-based composite reinforced with high-strength glass fibers and to evaluate the mechanical properties of the material. Methods： High strength continu- ous glass fibers were impregnated into the UP composite to fabricate the compound material, which then were used to pre- pare 9 composite posts （19ram in length ＆ 13turn in diameter）. The mechanical properties （bending strength ＆ elastic mod- ulus） of glass fiber/UP composite posts were measured. Results： The average of bending strength and elastic modulus of the specimens was 1060MPa and 27.7GPa, respectively. The elastic modulus of the specimens was similar to that of the dentine. Conclusion： The newly developed UP composite posts reinforced with high-strength glass fibers showed optimal mechanical properties. Further biological safety testing of the material in clinical practice is needed for a successful application.