title: Combined use of rapid-prototyping model and surgical guide in correction of mandibular asymmetry malformation patients with normal occlusal relationship.
abstract: OBJECTIVE
  The aim of this study is to discuss the application of rapid-prototyping model and surgical guide in the treatment of mandibular asymmetry malformation with normal occlusal relationship.
  
  
  METHODS
  Twenty-four mandibular asymmetry malformation patients with relatively normal occlusal relationship were included in this study. Surgical 3-dimensional rapid-prototyping mandibular models were made for all patients from the computed tomography (CT) DICOM data. The presurgical plan was designed on the model, and the surgical guiders for the osteotomy lines were manufactured. Genioplasty and/or mandibular osteotomy based on the presurgical plan were performed on these patients with the combined use of the rapid-prototyping model and surgical guides. All patients underwent postoperative CT scan and had at least 3-month follow-up.
  
  
  RESULTS
  All patients were satisfied with the final results. According to the postoperative CT images and 3-month follow-up, all patients' mandibular asymmetry malformation was significantly improved, and the operation time was distinctly shortened relative to the conventional method.
  
  
  CONCLUSIONS
  Rapid-prototyping model and surgical guide are viable auxiliary devices for the treatment of mandibular asymmetry malformation with relatively normal occlusal relationship. Combined use of them can make precise preoperative design, improve effects of operation, and shorten operating time.
authors.affiliation: From the *Departments of Plastic and Reconstructive Surgery and †Oral and Maxillofacial Surgery, Shanghai Ninth Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
authors.forename: Haisong
authors.initials: H
authors.lastname: Xu
authors.forename: Ce
authors.initials: C
authors.lastname: Zhang
authors.forename: Yoong Hoon
authors.initials: YH
authors.lastname: Shim
authors.forename: Hongliang
authors.initials: H
authors.lastname: Li
authors.forename: Dejun
authors.initials: D
authors.lastname: Cao
mesh_terms: D000293:Adolescent; D000328:Adult; D017076:Computer-Aided Design; D003766:Dental Occlusion; D005146:Facial Asymmetry / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D063172:Genioplasty / Q000379:methods; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008334:Mandible / Q000601:surgery; D008336:Mandibular Diseases / Q000601:surgery*; D063168:Mandibular Osteotomy / Q000295:instrumentation*; D008953:Models, Anatomic; D061646:Operative Time; D010347:Patient Care Planning; D017060:Patient Satisfaction; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D014584:User-Computer Interface; D055815:Young Adult