树脂基质组成对牙科复合树脂力学性能的影响

Influence of matrix composition on the properties of dental restorative resins

目的:研究三种树脂基质配比对牙科复合树脂力学性能的影响,确定复合树脂基质的理想配比。方法:将三种树脂基质(B is-GMA,UDMA,TEGDMA)按不同比例混合,加入固化剂,测试固化后试件的弯曲强度和弯曲模量。结果:当B is-GMA的含量减少,而UDMA或TEGDMA的含量增加时,树脂的弯曲强度升高。弯曲模量亦是随着UDMA或TEGDMA含量的增加而增加。TEGDMA与UDMA的摩尔比为5∶5时,树脂的力学性能最佳(弯曲强度为71.0 MPa,弯曲模量为1 808.2MPa)。结论:三种树脂基质的不同配比对复合树脂的力学性能有显著影响,TEGDMA与UDMA的摩尔比为5∶5时,树脂的力学性能最佳。

Objective：To investigate the influence of the proportion of three kinds of matrix on the mechanical property of the resin,and look for an ideal proportion.Methods： Bis-GMA,UDMA,TEGDMA were mixed in different proportion,the curing agent was added to solidify the resin.The flexural strength and modulus of elasticity were then measured.Results：When Bis-GMA was reduced and UDMA or TEGDMA was increased,the flexural strength was improved.The modulus of elasticity was increased with the increase of UDMA or TEGDMA.The best mechanical property was obtained when UDMA and TEGDMA were mixed by 5∶5 in molarity（the flexural strength was 71.0 MPa and modulus of elasticity was 1 808.2 MPa）.Conclusion：The composition of three matrixes has obvious influence on the mechanical property of resin.The best proportion for UDMA and TEGDMA is 5∶5.