二期处理光固化复合树脂径向抗张强度和硬度  

The diametral tensile strength and hardness of the secondarily treated composite resins

作　　者：江中明[1] 曹志中[1] 洪法廉[2] 王鑫源[2] 

机构地区：[1]第二军医大学长海医院,上海200433 [2]第四军医大学口腔医学院,陕西西安710032

出　　处：《牙体牙髓牙周病学杂志》1999年第3期211-213,共3页Chinese Journal of Conservative Dentistry

摘　　要：目的：探讨经过二期处理的光固化复合树脂其径向抗张强度和硬度与单纯光固化复合树脂的差异。方法：Ｓｔａｒｆｉｌ Ａ２０ 、后牙用复合树脂、Ｒｅｓｔｏｒａｔｉｖｅ Ｚ１００ 三种光固化复合树脂光固化４０ｓ 后，分别光照５ｍｉｎ，１４０℃加热处理７．５ｍｉｎ 和０ ．６ＭＰａ １２０℃加热加压处理７ｍｉｎ ，测量其径向抗张强度和硬度。结果：径向抗张强度测试：经过处理的光固化复合树脂除光照５ｍｉｎ 组外，其它两个处理组均高于对照组（ 仅光固化４０ｓ），且有统计学差异（ Ｐ＜ ０．０５） 。硬度测试：除Ｓｔａｒｆｉｌ Ａ２０ 和后牙用复合树脂光照５ｍｉｎ 组外，其余各处理组均高于对照组，且有统计学差异（Ｐ＜ ０ ．０５） 。结论：与单纯光固化复合树脂相比，经过二期处理的光固化复合树脂，其径向抗张强度和硬度不同程度的提高。Aim: To study the difference of the diametral tensile strength and hardness between the secondarily treated composite resins and the light cured composite resins. Methods: The composite resins(starfil A20, the posterior composite resin and restorative Z100) were treated secondarily by light curing for 5min, heat treating at 140℃ for 7.5min or curing at 120℃ and 0.6MPa pressure under water for 7min after light curing for 40s, then the diametral tensile strength and hardness wre evaluated. Results: The diametral tensile strength in the two groups of secondarily treated composite resins was higher than that in the control groups(light cured 40s only) and had statistical difference ( P <0.05), but that in the group of secondarily treated by light curing for 5min was not significant higher than in the control group. The hardness in the three groups of secondarily treated composite resins was statistical higher ( P <0.05) than that in the control groups except in the group of starfil A20 and the posterior composite resin light-cured for 5min. Conclusions: The diametral tensile strength and hardness of the secondarily treated composite resins were higher than those of the light cured composite resins.

关 键 词：径向抗张强度 硬度 二期处理 光固化复合树脂 

分 类 号：R783.1[医药卫生—口腔医学]