牙冠口扫

52岁女去年在外州开始4号牙根管治疗（图一），由于新冠病毒和搬家而拖延治疗，现在要求完成根管治疗（图二，三），B: 颊侧（主牙胶尖：20/.04）；L: 舌侧（旋转锉：20/.04）。Shining口扫（图四（咬合面观），五（舌侧观），六（颊侧观；对合：局部托牙 （RPD）））。为了保险起见，要求实验室制作两个牙冠：取模，口扫。帮助实验室建立完善数字化系统，从而帮助临床工作。备牙边缘清晰（图八）。牙冠边缘与数字模型（图九）和牙齿吻合，天衣无缝。

Shining Oral Scanner and Crown Prep Margin

Root canal therapy (RCT) was initiated for the tooth #4 of a 52-year-old lady out of state approximately 8 months earlier (Fig.1).  The patient requested finishing the treatment and permanent crown fabrication.  The buccal (Fig.2 B (master cone 20/.04)) and lingual (L (rotary file 20/.04))) canals fuse near the apex.  RCT was done with insertion of 20/.04 and 20/.06 master cones in the buccal and lingual canals, respectively, followed by composite build-up (Fig.3). With basically shoulder margin (not feather margin, chamfer margin ok), it is easy to scan (Fig.4-6 (RPD: removable partial denture)).  Return to  Oral Scanner Xin Wei, DDS, PhD, MS 1st edition 06/05/2021, last revision 06/25/2021