加压固化法对全口基托适合度的影响

目的:探索用普通热凝树脂在注压法条件下制作出机械性能及适合度更好的试件及基托。方法:用热凝塑料,分别按传统水浴法及注压固化法制作试件及上半口义齿基托,与BPS专用树脂材料在注压条件下制作的试件及基托,进行抗弯强度、表面硬度及基托适合度测试。采用SPSS12ForWindows统计软件进行组间t检验。结果:热凝树脂采用注压法聚合成型与采用传统水浴法聚合的试件,在抗弯强度和表面硬度上有显著差异(P<0.05)。上半口基托在A、B、D、E点上的距离差异显著(P<0.05)。结论:普通热凝树脂通过注压法聚合成型,在表面硬度、抗弯强度及基托适合度上均有所提高。

The influence of heat/pressure polymerization method on the adaptation of complete denture base

PURPOSE: The purpose of this in vitro study is to investigate the mechanical ability and adaptation of complete denture base by the use of thermoformed resin cured with heat/pressure injection method. METHODS: The flexural strength, the surface hardness and the adaptation of thermoformed resin and SR Ivoclar capsule resin were compared between using the conventional water bath-cured method and heat/pressure injection method. The collected date were analyzed statistically using the two-sample t test at alpha=0.05. RESULTS: The thermoformed resin cured with heat/pressure injection method has significant difference from that cured with conventional water bath-cured method on flexural strength and surface hardness (P<0.05). The upper partial base had significant difference in the gap distance at point A, B, D and E (P<0.05) between the thermoformed denture base cured with heat/pressure injection method and conventional water bath-cured method. CONCLUSIONS: These findings indicate that the thermoformed resin cured with heat/pressure injection method has better mechanical abilities and adaptation than that cured with conventional water bath-cured method.