title: Applying computer techniques in repairing mild mandibular asymmetry with high-density porous polyethylene.
abstract: OBJECTIVE
  The purpose of this study was to explore a new method to repair mild mandibular asymmetry using computer-aided design technique.
  
  
  METHODS
  Medical three-dimensional image reconstruction and mirror technique were applied to design individual Medpor implant before operation. A surgical procedure was performed in 9 patients with mild mandibular asymmetry according to the preoperative planning. The Medpor implants in the body were displayed using surface rendering technique after operation, and the postoperative evaluation was performed using matching technique.
  
  
  RESULTS
  All the patients had an ideal clinical outcome, with no complications. Virtual images from preoperative design and postoperative three-dimensional images were registered and superimposed onto each other. The percentage of matching was 87.6% to 96.8% with an average of 93.8%±2.4%.
  
  
  CONCLUSIONS
  The computer techniques play an important role in repairing mandibular asymmetry and will be used widely in craniofacial surgery.
authors.affiliation: Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Feng
authors.initials: F
authors.lastname: Niu
authors.forename: Shuang
authors.initials: S
authors.lastname: Qiu
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Liu
authors.forename: Lai
authors.initials: L
authors.lastname: Gui
mesh_terms: D000328:Adult; D001672:Biocompatible Materials / Q000627:therapeutic use*; D018786:Bone Substitutes / Q000627:therapeutic use*; D017076:Computer-Aided Design; D004954:Esthetics; D005146:Facial Asymmetry / Q000000981:diagnostic imaging / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008334:Mandible / Q000002:abnormalities / Q000601:surgery; D008336:Mandibular Diseases / Q000000981:diagnostic imaging / Q000601:surgery*; D008338:Mandibular Injuries / Q000601:surgery; D010347:Patient Care Planning; D020959:Polyethylene / Q000627:therapeutic use*; D011095:Polyethylenes / Q000627:therapeutic use; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D014584:User-Computer Interface; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; C084562:Medpor; D011095:Polyethylenes; D020959:Polyethylene