title: Influence of anatomic position and intraoperative exposure of the inferior alveolar nerve on neurosensory disturbance after sagittal split ramus osteotomy: a three-dimensional computed tomography study.
abstract: OBJECTIVE
  To evaluate the influence of the anatomic position and intraoperative exposure of the inferior alveolar nerve on neurosensory disturbance (NSD) in sagittal split ramus osteotomy.
  
  
  METHODS
  The anatomic factors of the nerve were measured on preoperative three-dimensional computed tomography in 98 patients. The intraoperative nerve exposure was assessed. NSD was evaluated for 1 year after surgery. The correlations between NSD and the factors were analyzed.
  
  
  RESULTS
  The NSD decreased as the lateral marrow space from the nerve increased (P < .01). The complete nerve exposure increased NSD by 7.6 times (P = .01). The nerve exposure increased as the buccal plate thickness increased (P = .01) and decreased as the vertical marrow space from the nerve increased (P = .01).
  
  
  CONCLUSIONS
  The nerve exposure and the lateral marrow space from the nerve affected NSD. The buccal plate thickness and the vertical marrow space indirectly affected NSD through nerve exposure.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Seoul Asan Medical Center, Seoul, Korea.
authors.forename: Jee Ho
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Oral and Maxillofacial Surgery, Seoul Asan Medical Center, Seoul, Korea.
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Son
authors.affiliation: Department of Oral and Maxillofacial Surgery, Seoul Asan Medical Center, Seoul, Korea.
authors.forename: Jong Hyun
authors.initials: JH
authors.lastname: Hwang
authors.affiliation: Department of Clinical Epidemiology and Biostatistics, Seoul Asan Medical Center, Seoul, Korea.
authors.forename: Seung Hee
authors.initials: SH
authors.lastname: Baek
authors.affiliation: Department of Oral and Maxillofacial Surgery, Seoul Asan Medical Center, Seoul, Korea. Electronic address: amcomsjjh@gmail.com.
authors.forename: Ju Hong
authors.initials: JH
authors.lastname: Jeon
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008340:Mandibular Nerve / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D059229:Osteotomy, Sagittal Split Ramus; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*; D061221:Trigeminal Nerve Injuries / Q000209:etiology* / Q000517:prevention & control*