Computer-assisted surgical planning and simulation for unilateral condylar benign lesions causing facial asymmetry

• Published in: Oral surgery, oral medicine, oral pathology and oral radiology oral medicine, oral pathology and oral radiology, 2017-04, Vol.123 (4), p.453-458
• Main Authors: Lu, Chuan, DDS, MS, He, Dongmei, DDS, MD, Yang, Chi, DDS, MD, Huang, Dong, DDS, MS, Ellis, Edward, DDS, MS
• Format: Article
• Language: English
• Subjects: Adult; Computer Simulation; Dentistry; Facial Asymmetry - etiology; Facial Asymmetry - surgery; Female; Humans; Male; Middle Aged; Orthognathic Surgical Procedures; Osteotomy, Le Fort; Osteotomy, Sagittal Split Ramus; Retrospective Studies; Software; Surgery; Surgery, Computer-Assisted; Temporomandibular Joint Disorders - complications; Temporomandibular Joint Disorders - surgery; Tomography, X-Ray Computed; Treatment Outcome
• ISSN: 2212-4403; 2212-4411
• DOI: 10.1016/j.oooo.2016.11.013

Abstract Objective The purpose of this study was to investigate the best surgical sequence for the treatment of unilateral condylar benign lesions causingfacial asymmetry by the application of computer-assisted surgical planning and simulation. Study Design Computer tomography (CT) data from 12 patients whose maxillary cant were corrected by maintaining the vertical position of the central incisors and equally intruding the long side of the maxilla and extruding theshort side were analyzed by ProPlan CMF 1.4 software (Materialise Medical, Leuven, Belgium). Condylectomy and double jaw orthognathic surgery with two different surgical sequences were simulated: 1) maxillary LeFort I osteotomy first (MaxF), then condylectomy, followed by bilateral sagittal split ramus osteotomy (BSSO); 2) mandible first (ManF) which begins with condylectomy, then BSSO, and lastly LeFort I osteotomy. The greatest space between the maxillary and mandibular first molar in the interim positions was measured virtually to compare the two surgical sequences. Results The vertical distance between the upper and lower teeth of ManF patients was significantly smaller than MaxF (mean, 2.99 mm, p