Tufts University School of Dental Medicine, Boston, MA 02111-1527, USA.
J Prosthet Dent. 2013 Jan;109(1):57-60. doi: 10.1016/S0022-3913(13)60013-X.
Cement-retained, implant-supported restorations have advantages over screw-retained restorations, but retrievability can be a problem. By using computer-aided design and computer-aided manufacturing (CAD/CAM) technology, a working cast or mouth can be scanned, and a definitive record of the screw hole can be made in 3 dimensions and saved as a file. This information includes not only the position of the opening of the screw hole but also its angulation and orientation, which can be retrieved if required.
黏固式、种植体支持的修复体优于螺丝固位修复体，但可取出性可能是一个问题。通过使用计算机辅助设计和计算机辅助制造（CAD/CAM）技术，可以扫描工作模型或口腔，并以三维形式制作螺丝孔的准确记录并保存为文件。这些信息不仅包括螺丝孔开口的位置，还包括其角度和方向，如果需要，可以进行检索。
