Saiki Osamu, Koizumi Hiroyasu, Akazawa Nobutaka, Kodaira Akihisa, Okamura Kentaro, Matsumura Hideo
Department of Fixed Prosthodontics, Nihon University School of Dentistry.
J Oral Sci. 2016;58(1):117-23. doi: 10.2334/josnusd.58.117.
This study compared the wear characteristics of a heat-pressed lithium disilicate ceramic material opposed to feldspathic porcelain, a lithium disilicate glass ceramic, and zirconia materials. Ceramic plate specimens were prepared from feldspathic porcelain (EX-3 nA1B), lithium disilicate glass ceramics (e.max CAD MO1/C14), and zirconia (Katana KT 10) and then ground or polished. Rounded rod specimens were fabricated from heat-pressed lithium disilicate glass ceramic (e.max press LT A3) and then glazed or polished. A sliding wear testing apparatus was used for wear testing. Wear of glazed rods was greater than that of polished rods when they were abraded with ground zirconia, ground porcelain, polished porcelain, or polished lithium disilicate ceramics. For both glazed and polished rods, wear was greater when the rods were abraded with ground plates. The findings indicate that application of a polished surface rather than a glazed surface is recommended for single restorations made of heat-pressed lithium disilicate material. In addition, care must be taken when polishing opposing materials, especially those used in occlusal contact areas. (J Oral Sci 58, 117-123, 2016).
本研究比较了热压二硅酸锂陶瓷材料与长石质瓷、二硅酸锂玻璃陶瓷和氧化锆材料的磨损特性。从长石质瓷（EX - 3 nA1B）、二硅酸锂玻璃陶瓷（e.max CAD MO1/C14）和氧化锆（Katana KT 10）制备陶瓷板试样，然后进行研磨或抛光。从热压二硅酸锂玻璃陶瓷（e.max press LT A3）制作圆形棒状试样，然后进行上釉或抛光。使用滑动磨损测试装置进行磨损测试。当用研磨的氧化锆、研磨的瓷、抛光的瓷或抛光的二硅酸锂陶瓷磨损时，上釉棒的磨损大于抛光棒。对于上釉棒和抛光棒，当用研磨的板磨损时，磨损都更大。研究结果表明，对于由热压二硅酸锂材料制成的单冠修复体，建议使用抛光表面而非上釉表面。此外，在抛光相对的材料时必须小心，尤其是用于咬合接触区域的材料。（《口腔科学杂志》58卷，117 - 123页，2016年）
