Marchack Baldwin W, Futatsuki Yukiko, Marchack Christopher B, White Shane N
University of Southern California, School of Dentistry, Los Angles, CA, USA.
J Prosthet Dent. 2008 Mar;99(3):169-73. doi: 10.1016/S0022-3913(08)00028-0.
Generically milled zirconia copings for all-ceramic crowns may not provide optimal thickness and form for the coping or the porcelain veneer. This article describes the customization of milled zirconia copings to provide even and controlled porcelain thickness with the aim of decreasing cohesive porcelain fracture and other failures. A full-contour waxing and cut back in conjunction with a dual-scan technique was used to ensure adequate coping thickness, adequate, even porcelain thickness, and butt joints at the porcelain-to-coping junctions.
用于全瓷冠的普通铣削氧化锆基底冠可能无法为基底冠或瓷贴面提供最佳厚度和形状。本文介绍了对铣削氧化锆基底冠进行定制，以提供均匀且可控的瓷层厚度，目的是减少瓷层内聚性断裂和其他失败情况。采用全轮廓蜡型制作和回切，并结合双扫描技术，以确保基底冠有足够的厚度、足够且均匀的瓷层厚度，以及在瓷层与基底冠交界处的对接。
