title: Accuracy of intraoral vertical ramus osteotomy with a stereolithographic template.
abstract: Various modifications have been described to improve the accuracy in intraoral vertical ramus osteotomy (IVRO), but there was not a measurable facility to determine the osteotomy line. The purpose of this study was to evaluate the accuracy of the computer tomography (CT)-based osteotomy template on cadaver mandibles and to assess the outcome after IVRO correcting mandibular prognathism. Four human wet cadaver heads were subjected to a high-resolution multislice spiral CT scan. After the virtual osteotomies in the planning program, the individual osteotomy templates were produced by stereolithography. A stable and secure fit of the stereolithographic templates was achieved via the individual CT-based osteotomy template. The osteotomy lines were performed exactly as planned in the virtual osteotomies planning program. Similar sound outcome was also observed in the clinic. Use of the CT-based osteotomy templates is a safe method for osteotomy. It is rather convenient for vertical osteotomy in IVRO increasing the intraoperative accuracy and efficiency.
authors.affiliation: Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
authors.forename: Xia-Yun
authors.initials: XY
authors.lastname: Chen
authors.forename: Song-Ling
authors.initials: SL
authors.lastname: Chen
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Deng
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008334:Mandible / Q000601:surgery*; D008953:Models, Anatomic; D010027:Osteotomy / Q000379:methods*; D011378:Prognathism / Q000000981:diagnostic imaging / Q000601:surgery*; D036542:Tomography, Spiral Computed / Q000379:methods*; D014584:User-Computer Interface; D055815:Young Adult