title: Apex radicis dentis excision operation guided by template made by CAD/CAM.
abstract: OBJECTIVE
  The aim of the study is to explore the clinical efficacy of apex radicis dentis excision guided by a template made by Computer Aided Design/Computer Aided Manufacture (CAD/CAM).
  
  
  METHODS
  Base on the CBCT image of oral cavity, a three-dimensional model of patient's oral cavity was built. Then the access way and excisional area were defined based on the model. Finally, the operative guide template was designed and made to help define the direction, depth, and area of the surgery.
  
  
  RESULTS
  One year after the operation with guide template, the two cases of apex radicis dentis with difficulty in cure were proven to have normal masticatory function and their pathological changes of apex radicis dentis disappeared as well.
  
  
  CONCLUSIONS
  Utilization of CAD/CAM technology could well design the operative guide template for the resection of apex radicis dentis. Usingthis guide template could make the excision of apex radicis dentis more quickly and safer.
authors.affiliation: Department of Stomatology, The First Affiliated Hospital, Zhejiang University NO.79, Qingchun Road, Hangzhou 310003, Zhejiang Province, China.
authors.forename: Zong-Lai
authors.initials: ZL
authors.lastname: He
authors.affiliation: Department of Stomatology, The First Affiliated Hospital, Zhejiang University NO.79, Qingchun Road, Hangzhou 310003, Zhejiang Province, China.
authors.forename: Su-Qing
authors.initials: SQ
authors.lastname: Cai
authors.affiliation: Department of Stomatology, The First Affiliated Hospital, Zhejiang University NO.79, Qingchun Road, Hangzhou 310003, Zhejiang Province, China.
authors.forename: Guang-Sheng
authors.initials: GS
authors.lastname: Jin
authors.affiliation: Key Laboratory of E & M (Zhejiang University of Technology), Ministry of Education & Zhejiang Province Zhejiang, China.
authors.forename: Yun-Feng
authors.initials: YF
authors.lastname: Liu
keywords: CAD/CAM; apex radicis dentis excision; operative guide template