权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study on Wear Resistance of Dental Restorative Materials

牙科修复材料耐磨性研究

基本信息

批准号：
08457523
负责人：
TANI Yoshiaki
金额：
$ 3.78万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08457523/
关键词：
Dental Restorative Materials Wear Resistance Abrasion Test Composite Resin Glass Beads Abrasion Tester

项目摘要

A new method for quantitative measurement of occlusal wear on restoration is proposed in the present investigation. With the aim of reproducing a mechnical environment of the oral cavity, this test method uses glass beads which have the curvature and hardness similar to those of the abraded occlusal surface. The test method consists essencially in making a specimen to reciprocate on glass beads covered over a PMMA plate. The total stroke is 10,000 and it is equal to traveling 1,000m. The toothbrushing abrasion test was also carried out for comparison.ALL of the conventional composites showed much higher wear in volume loss after the glass beads abrasion test than the microfilled resin in abrasion. The results obtained by the toothbrushing abrasion conflicted with those obtained by the glass beads abrasion. There was a close parallel between the results of the glass beads abrasion and clinical observations. Moreover, SEM studies supported the results described above. In vitro wear of sixteen posterior composite resins was then determined by the glass beads abrasion test. Microfilled posterior composites wear higher wear-resistant than highly loaded posterior composites. There is little difference in wear between submicrofilled resins and microfilled resins with the thick slurry. This suggests that the filler particle size is relatively important to wear resistance of the posterior composite materials. There is no consistency among the wear measurements in the toothbrushing abrasion test.

本研究提出了一种定量测量修复体咬合磨损的新方法。为了再现口腔的机械环境，该测试方法使用曲率和硬度与磨损的咬合面相似的玻璃珠。该测试方法主要包括使样本在覆盖在 PMMA 板上的玻璃珠上往复运动。总行程为10,000，相当于行驶1,000m。还进行了刷牙磨损试验以进行比较。在玻璃珠磨损试验后，所有传统复合材料在体积损失方面表现出比微填充树脂磨损高得多的磨损。牙刷磨损获得的结果与玻璃珠磨损获得的结果相矛盾。玻璃珠磨损的结果与临床观察结果非常相似。此外，SEM 研究支持了上述结果。然后通过玻璃珠磨损试验测定十六种后部复合树脂的体外磨损。微填充后部复合材料比高负载后部复合材料具有更高的耐磨性。亚微填充树脂和带有浓浆的微填充树脂之间的磨损几乎没有差异。这表明填料粒径对于后复合材料的耐磨性相对重要。刷牙磨损测试中的磨损测量结果不存在一致性。