热压膜材料和自凝树脂的力学性能对比研究

Comparative study on mechanical properties of the Thermoplastic Materials and Self-Curing Resin

目的比较热压膜材料和自凝树脂的力学性能,为选择更为合适的材料代替自凝树脂做颊侧多曲簧活动矫治器的托提供参考。方法在室温25℃环境下,选用3 mm厚的热压膜膜片和3 mm厚的自凝树脂各10个,应用万能拉伸测力机测量并比较其力学性能,并在电镜下观察断口的形貌。结果3 mm厚的热压膜材料的弹性模量为(1258.10±141.66) MPa,拉伸强度为(24.02±0.09) MPa,压缩强度为(47.55±1.03) MPa,明显低于3 mm厚的自凝树脂(P<0.05)。3 mm厚的热压膜材料的延伸率为(38.6±0.45)%,明显高于3 mm厚的自凝树脂(P<0.05)。结论临床上考虑到颊侧多曲簧活动矫治器对托弹性的要求,可考虑此种热压膜材料代替自凝树脂做托。

ObjectiveThe paper compares the mechanical properties of the thermoplastic materials and self-curing resin, and provides reference for choosing the more suitable material instead of self-curing resin to make the base plate of the Buccal Multiloop removable appliance. MethodsAt room temperature of 25 ℃, we choose 3 mm hot film diaphragm and 3 mm self-curing resin each 10, to measure and compare the mechanical properties, using the universal tensile force measuring machine, and to observe the morphology of fracture surface under the electron microscope.ResultsThe elastic and ductility of the thermoplastic materials results satisfied.ConclusionsIt is considered that this type of the thermoplastic materials could be used to replace the self-curing resin mandible.