四种临时冠桥材料抗弯强度和挠曲模量的对比分析

摘要

目的:对比分析4种临时冠桥材料的抗弯强度及挠曲模量.方法:选取Integrity(A组)、Luxatemp(B组)、Structur 2 SC (C组)、Protem 3 Garant (D组)4种临时冠桥材料制备标准试件各20个,颜色均为A2,采用三点抗弯强度试验分别测定其抗弯强度和挠曲模量,并进行统计分析.结果:A组抗弯强度显著高于其余三组(P < 0.05),B、C、D组间无统计学差异(P >0.05).A、B、C组间的挠曲模量无显著性差异(P >0.05),均高于D组(P < 0.05).结论:4种临时冠桥材料抗弯强度及挠曲模量间存在差异,A组抗弯强度最大,D组挠曲模量最小.临床医生可根据具体情况选择合适的临时冠桥材料.%Objective: To investigate the flexural strength and flexural modulus of four provisional restorative materials. Methods: The flexural strength (FS) and flexural modulus (FM) of Integrity (group A), Luxatemp (group B), Structur 2 SC (group C) and Protemp 3 Garant (group D) were tested in three-point bending test. Results: There was no significant difference among group B, C and D in flexural strength (P>0.05), and group A had the significantly highest flexural strength (P< 0.05). There was no significant difference of flexural modulus among group A, B and C (P>0.05), which were significantly higher than the group D (P<0.05). Conclusion: It was shown that the Integrity owned the highest flexural strength and the Protemp 3 Garant possessed the lowest flexural modulus. The clinician must be aware of the characteristics of various materials and make the suitable choice of provisional materials.