暂时冠桥材料抗压强度的体外实验研究

目的:对比分析5种暂时冠桥材料的抗压强度。方法:参照标准制作直径4 mm,高6 mm的圆柱形试件50个,甲基丙烯酸酯即自凝树脂(A组)、Integrity(B组)、Luxatemp(C组)、Temphase(D组)、Protem 3 Garan(tE组)5种暂时冠桥材料试件各10个,采用万能材料试验机测定其抗压强度,并进行统计分析。结果:A组抗压强度(210.28±20.07)MPa,显著低于其余4组(P<0.05),E组抗压强度最高(304.55±24.50)MPa,B、C、D组间无统计学差异(P>0.05),B、D、E组间也无显著性差异(P>0.05),C组和E组间抗压强度差异有统计学意义(P<0.05)。结论:5种暂时冠桥材料抗压强度间存在较大差异,Bis-acryl类材料较甲基丙烯酸酯类材料抗压强度高。

In vitro study on compression strength of five kinds of provisional restorative materials.

Objective：To investigate the compression strength of five kinds of provisional restorative materials. Method： Fifty cylinder specimens were fabricated with 4mm in diameter and 6mm in height. Ten specimens were made of self-curing resin （group A）, Integrity （group B）, Luxatemp （group C）, Temphase （group D） and Protemp 3 Garant （group E） respectively. Then the compression strength of all the specimens were tested by the universal testing machine. Result： The compression strength of group A was the lowest among the groups （P 〈0.05）. It was not significant difference among group B, C and D in compression strength （P 〉0.05）, and it was also not significant difference among group B, D and E （P 〉0.05）. While the significant difference in compression strength was found between group C and group E （.P 〈0.05）. Conclusion： The compression strength performance of five kinds of provisional restorative materials are significant difference. The Bisacryl resins have higher compression strength than those of themethacrvlate- based resins.