Ekfeldt A, Oilo G
Department of Prosthetic Dentistry, Faculty of Odontology, Gothenburg University, Sweden.
Acta Odontol Scand. 1989 Dec;47(6):391-9. doi: 10.3109/00016358909004808.
The aim of this investigation was to describe the wear mechanism in occlusal contact areas of porcelain and acrylic resin denture teeth opposing different dental materials. A 55-year-old man with earlier extensive wear was given two complete dentures, as identical as possible, in the upper jaw. One of the dentures had diatoric teeth in cross-linked resin and the other denture had diatoric teeth in porcelain. The dentures were antagonizing a new gold-acrylic fixed bridge from 46 to 36. Two contralateral segments of the bridge were made as removable double crowns. The removable segments were made in different materials: gold, porcelain, light-cured resin, and heat-cured resin. Wear of the denture teeth was studied by scanning electron microscopy on replica models made after 1 and 2 months of antagonizing contact with the various materials. Wear of both porcelain and modern cross-linked resin teeth was mainly a fatigue type of wear. Abrasion was observed when hard particles were assumed to be part of the wear debris.
本研究的目的是描述与不同牙科材料相对的烤瓷牙和丙烯酸树脂假牙牙齿咬合接触区域的磨损机制。一名55岁有早期广泛磨损的男性患者上颌佩戴了两副尽可能相同的全口假牙。其中一副假牙的双尖牙为交联树脂材质，另一副假牙的双尖牙为烤瓷材质。这些假牙与一个从46至36的新型金-丙烯酸固定桥相对。该桥的两个对侧节段制作成可摘式双冠。可摘节段采用不同材料制成：金、瓷、光固化树脂和热固化树脂。在与各种材料进行1个月和2个月的对抗接触后制作复制模型，通过扫描电子显微镜研究假牙牙齿的磨损情况。烤瓷牙和现代交联树脂牙的磨损主要是疲劳型磨损。当假定硬颗粒是磨损碎屑的一部分时，可观察到磨蚀。
