Abe Y, Sato Y, Taji T, Akagawa Y, Lambrechts P, Vanherle G
Department of Removable Prosthodontics, Hiroshima University, Faculty of Dentistry, Hiroshima, Japan.
J Oral Rehabil. 2001 May;28(5):407-12. doi: 10.1046/j.1365-2842.2001.00670.x.
This in vitro study evaluated the wear effects of five posterior denture tooth materials on human enamel. The tooth specimen was cusp shaped and enamel specimen was formed as a 10 C 10 C 5 mm plate. All material-enamel combinations were tested using a machine designed to produce sliding contact 20 C 104 times at 60 cycles min-1 and a 4-mm sliding distance per stroke in the bucco-lingual direction under a load of 1 kg. Wear analysis was measured as the total height loss of each combination. In addition, the surface roughness (Ra) of each worn specimen was also evaluated. The least total height loss occurred with poly (methyl methacrylate) (PMMA) enamel pair, and the greatest did with porcelain (Po)-enamel pair. The lowest compound Ra value was measured in high-strength resin (HR)-enamel pair, and the highest in Po-enamel pair. These findings suggest that the best combination is PMMA-enamel, and the poorest combination is Po-enamel.
这项体外研究评估了五种后牙义齿材料对人牙釉质的磨损影响。牙齿标本为尖形，牙釉质标本制成10×10×5毫米的板状。所有材料与牙釉质的组合均使用一台机器进行测试，该机器设计为在1千克负载下，以每分钟60次循环、每次冲程4毫米的滑动距离，在颊舌方向产生20×10⁴次滑动接触。磨损分析以每种组合的总高度损失来衡量。此外，还评估了每个磨损标本的表面粗糙度（Ra）。聚甲基丙烯酸甲酯（PMMA）与牙釉质的组合总高度损失最小，而瓷（Po）与牙釉质的组合总高度损失最大。高强度树脂（HR）与牙釉质的组合测得的复合Ra值最低，而Po与牙釉质的组合最高。这些发现表明，最佳组合是PMMA与牙釉质，最差组合是Po与牙釉质。
