Ekfeldt A, Fransson B, Söderlund B, Oilo G
Department of Prosthetic Dentistry, Faculty of Odontology, University of Göteborg, Sweden.
Acta Odontol Scand. 1993 Apr;51(2):99-107. doi: 10.3109/00016359309041154.
The purpose of this study was to compare a gravimetric method and an impression technique in the evaluation of occlusal substance loss. The wear of gold, porcelain, and microfilled resin was studied in vivo. The gravimetric method showed lower substance loss for porcelain than for gold, whereas the microfilled resin had the highest substance loss. To obtain a higher accuracy for the measurement of occlusal substance loss of restorative materials with an impression technique, the test area has to be restricted, the antagonizing occlusal contacts carefully recorded before the test period, and the number of cuts increased. The observed structure of wear facets (SEM) corroborated with previous findings of the wear mechanism of these materials; that is, gold has mainly abrasive wear in contact with porcelain, whereas porcelain has a fatigue type and microfilled resin a tribochemical type of wear.
本研究的目的是比较重量法和印模技术在评估咬合面物质损失方面的效果。对金、瓷和微填料树脂的磨损情况进行了体内研究。重量法显示，瓷的物质损失低于金，而微填料树脂的物质损失最高。为了通过印模技术更准确地测量修复材料的咬合面物质损失，必须限制测试区域，在测试期前仔细记录对抗性咬合接触，并增加切割次数。观察到的磨损小平面结构（扫描电子显微镜）与这些材料磨损机制的先前研究结果一致；也就是说，金与瓷接触时主要发生磨料磨损，而瓷发生疲劳型磨损，微填料树脂发生摩擦化学型磨损。
