Hacker C H, Wagner W C, Razzoog M E
Department of Prosthodontics, University of Michigan, Ann Arbor, USA.
J Prosthet Dent. 1996 Jan;75(1):14-7. doi: 10.1016/s0022-3913(96)90412-6.
This study compared enamel wear against low-fusing porcelain (Procera All-Ceramic) with the wear against feldspathic porcelain (Ceramco) and gold alloy (Olympia). Human enamel abraders were polished to a 3 microns variance on silicon carbide paper. Five enamel abraders were abraded against five disks that were fabricated from (1) gold alloy polished to 1 micron variance, (2) autoglazed feldspathic porcelain, and (3) autoglazed low-fusing porcelain. The enamel sample was tested in human saliva in a wear machine with a constant load of 1 pound during 10,000 rotational cycles. The amount of wear was determined with a stereomicroscope at magnification x64. Significant differences in mean enamel wear were found when abraded against Olympia gold (9 microns), Procera All-Ceramic (60 microns), and Ceramco feldspathic porcelain (230 microns). Significant differences in restorative material wear were found between Olympia gold (0.32 microns) and the porcelain materials, Procera All-Ceramic (4.3 microns) and Ceramco feldspathic porcelain (3.7 microns).
本研究比较了人类牙釉质与低熔烤瓷（Procera全瓷）、长石质烤瓷（Ceramco）及金合金（Olympia）之间的磨损情况。将人类牙釉质磨损体在碳化硅纸上抛光至3微米的差异度。用5个牙釉质磨损体分别与5个圆盘进行摩擦，这些圆盘由以下材料制成：（1）抛光至1微米差异度的金合金；（2）自上釉长石质烤瓷；（3）自上釉低熔烤瓷。牙釉质样本在磨损试验机中于人类唾液中进行测试，在10000次旋转循环过程中施加1磅的恒定负荷。通过放大64倍的体视显微镜测定磨损量。当牙釉质与Olympia金合金（9微米）、Procera全瓷（60微米）及Ceramco长石质烤瓷（230微米）摩擦时，发现平均牙釉质磨损存在显著差异。在Olympia金合金（0.32微米）与烤瓷材料Procera全瓷（4.3微米）及Ceramco长石质烤瓷（3.7微米）之间，发现修复材料磨损存在显著差异。
