Andreiuolo Rafael Ferrone, Sabrosa Carlos Eduardo, Cervantes Dias Katia Regina H
Department of Restorative Dentistry, State University of Rio de Janeiro, Rio de Janeiro, Brazil.
Eur J Dent. 2013 Sep;7(Suppl 1):S115-S118. doi: 10.4103/1305-7456.119088.
The use of bi-layered all-ceramic crowns has continuously grown since the introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) zirconia cores. Unfortunately, despite the outstanding mechanical properties of zirconia, problems related to porcelain cracking or chipping remain. One of the reasons for this is that ceramic copings are usually milled to uniform thicknesses of 0.3-0.6 mm around the whole tooth preparation. This may not provide uniform thickness or appropriate support for the veneering porcelain. To prevent these problems, the dual-scan technique demonstrates an alternative that allows the restorative team to customize zirconia CAD/CAM frameworks with adequate porcelain thickness and support in a simple manner.
自从引入计算机辅助设计/计算机辅助制造（CAD/CAM）氧化锆核后，双层全瓷冠的使用量持续增长。不幸的是，尽管氧化锆具有出色的机械性能，但与瓷层开裂或剥落相关的问题仍然存在。原因之一是，陶瓷内冠通常在整个牙体预备周围被研磨至0.3 - 0.6毫米的均匀厚度。这可能无法为贴面瓷提供均匀的厚度或适当的支撑。为防止这些问题，双扫描技术提供了一种替代方案，使修复团队能够以简单的方式定制具有足够瓷层厚度和支撑的氧化锆CAD/CAM框架。
