title: Effect of bone quality and position of the inferior alveolar nerve canal in continuous, long-term, neurosensory disturbance after sagittal split ramus osteotomy.
abstract: OBJECTIVE
  To examine the relationship between the anatomical position and the bone quality of the inferior alveolar nerve (IFAN) canal and long-term neurosensory disturbance (NSD) of the IFAN after a sagittal split ramus osteotomy (SSRO).
  
  
  METHODS
  CT images were taken of patients with mandibular prognathism. The location of the IFAN and the bone density around the IFAN were measured on CT images. Whether NSD at 6 months and 1 year after SSRO was related to the position and bone quality of the IFAN canal was analyzed.
  
  
  RESULTS
  Significant correlations were found between the anatomical position and the bone quality of the IFAN canal and the period to the resolution of NSD of the IFAN from 3 months to 1 year after SSRO. If the HU values around the IFAN were greater than 300 HU and/or the distance from the buccal aspect of the IFAN canal to the outer buccal cortical margin was less than 6 mm, NSD of the IFAN at 1 year after SSRO was significantly increased.
  
  
  CONCLUSIONS
  It is important to pay particular attention to the anatomical position of the IFAN and the bone quality around the IFAN to predict long-term NSD of the IFAN after SSRO.
authors: Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Miyazaki University, Miyazaki, Japan.
authors: Izumi
authors: I
authors: Yoshioka
authors: Tatsurou
authors: T
authors: Tanaka
authors: Manabu
authors: M
authors: Habu
authors: Masafumi
authors: M
authors: Oda
authors: Masaaki
authors: M
authors: Kodama
authors: Shinji
authors: S
authors: Kito
authors: Yuji
authors: Y
authors: Seta
authors: Kazuhiro
authors: K
authors: Tominaga
authors: Sumio
authors: S
authors: Sakoda
authors: Yasuhiro
authors: Y
authors: Morimoto
mesh_terms: D000293:Adolescent; D000328:Adult; D015519:Bone Density / Q000502:physiology*; D002508:Cephalometry / Q000379:methods; D003389:Cranial Nerve Diseases / Q000209:etiology*; D003430:Cross-Sectional Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible / Q000294:innervation / Q000473:pathology* / Q000601:surgery; D008340:Mandibular Nerve / Q000473:pathology*; D008875:Middle Aged; D059229:Osteotomy, Sagittal Split Ramus / Q000009:adverse effects*; D011378:Prognathism / Q000473:pathology / Q000601:surgery; D012684:Sensory Thresholds / Q000502:physiology; D012737:Sex Factors; D020886:Somatosensory Disorders / Q000209:etiology*; D013697:Thermosensing / Q000502:physiology; D014057:Tomography, X-Ray Computed / Q000379:methods; D014110:Touch / Q000502:physiology; D055815:Young Adult