Department of Fixed Prosthodontics, Tokyo Dental College.
Dent Mater J. 2024 Sep 28;43(5):667-671. doi: 10.4012/dmj.2024-058. Epub 2024 Aug 9.
This study compared the effects of two surface preparation methods on two types of zirconia. Immediately prior to the placement of a monolithic zirconia crown, its morphology may be modified using a rotary cutting instrument for occlusal adjustments. The crown surface is scratched during the grinding process and, thus, requires polishing. Simplified zirconia crowns of 3Y and 5Y were fabricated and used as specimens. The surface roughness and gloss of the occlusal surfaces of specimens were measured and compared when a polishing compound was used after polishing points and when a silica-based coating was sintered. No significant differences were observed in surface roughness between 3Y and 5Y zirconia. The use of polishing compounds was effective because polishing points alone only resulted in a level of surface roughness that may cause wear on antagonist teeth. Although the silica-based coating improved surface properties, the polishing compound more effectively improved surface roughness.
本研究比较了两种表面处理方法对两种类型氧化锆的影响。在放置整体氧化锆冠之前，可能会使用旋转切割器械对其进行调整以获得良好的咬合。在研磨过程中，牙冠表面会被划伤，因此需要进行抛光。制作并使用简化的 3Y 和 5Y 氧化锆冠作为样本。当在抛光点之后使用抛光剂或使用硅基涂层烧结时，测量和比较样本的咬合面的表面粗糙度和光泽度。3Y 和 5Y 氧化锆的表面粗糙度之间没有观察到显著差异。使用抛光剂是有效的，因为单独使用抛光点只会导致表面粗糙度水平，从而可能导致对颌牙齿磨损。尽管硅基涂层改善了表面性能，但抛光剂更有效地提高了表面粗糙度。
