Division of Biomaterials and Bioengineering, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Japan.
Dent Mater J. 2010 Nov;29(6):713-20. doi: 10.4012/dmj.2008-031. Epub 2010 Nov 19.
In the present study, enamel wear against indirect composite resins was evaluated using two newly designed wear test methods: a rotating sliding wear test and a buff wear test. For the composite resins investigated in this study, their surface morphologies were examined using a scanning probe microscope after buff-polishing. After the wear tests, enamel was worn down by hard fillers that protruded from the abraded resin matrices. Notably, enamel wear was induced by composite materials with a Vickers hardness number (VHN) greater than 45 and that the amount of enamel wear increased with increasing hardness of the composite material. Therefore, 45 VHN was the critical hardness value for composite resins at which antagonistic enamel wear would occur. Besides, the D-value obtained from the buff wear test indicated not only the relative wear resistance of the composite resin itself, but also its potential risk to induce antagonistic enamel wear.
在本研究中，使用两种新设计的磨损测试方法评估了牙釉质对间接复合树脂的磨损：旋转滑动磨损测试和缓冲磨损测试。对于本研究中研究的复合树脂，在缓冲抛光后使用扫描探针显微镜检查其表面形态。在磨损测试后，从磨损的树脂基质中突出的硬填料使牙釉质磨损。值得注意的是，牙釉质磨损是由维氏硬度数（VHN）大于 45 的复合材料引起的，并且复合材料的硬度越高，牙釉质磨损的量就越大。因此，45 VHN 是复合树脂发生拮抗牙釉质磨损的临界硬度值。此外，缓冲磨损测试获得的 D 值不仅表示了复合树脂本身的相对耐磨性，而且还表示了其引起拮抗牙釉质磨损的潜在风险。
