title: Evaluation of alveolar nerve function after surgical lengthening of the mandible by a bilateral sagittal split osteotomy or distraction osteogenesis.
abstract: This study compares the effects of bilateral sagittal split osteotomy (BSSO) and distraction osteogenesis (DO) for lengthening the mandible regarding loss of function of the inferior alveolar nerve (IAN). In a retrospective cohort study design, the function of the IAN was tested with a Weinstein monofilament 3.22, 1 year after the surgical procedure in 65 patients (35 BSSO; 30 DO). This was defined as the upper limit for normal function. Of 130 IAN studied (70 BSSO, 54%; 60 DO, 46%), nerve function was disturbed in 23 (18%). In this group, 14 cases (61%) had undergone BSSO and 9 (39%) DO. One-hundred and seven nerves had no neurosensory IAN changes; of these BSSO had been performed in 56 cases (52%) and DO in 51 cases (48%). After eliminating confounding factors, there was no significant difference in the occurrence of neurosensory changes between the treatment options (DO versus BSSO, odds ratio: 1.254 with 95% CI: 0.366-4.300). In conclusion, there was no difference in IAN function between patients treated with BSSO or DO for lengthening the mandible.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Isala Klinieken, Zwolle, The Netherlands. e.m.baas@isala.nl <e.m.baas@isala.nl>
authors.forename: E M
authors.initials: EM
authors.lastname: Baas
authors.forename: J
authors.initials: J
authors.lastname: de Lange
authors.forename: R B G
authors.initials: RB
authors.lastname: Horsthuis
mesh_terms: D000328:Adult; D017677:Age Distribution; D016009:Chi-Square Distribution; D015331:Cohort Studies; D005260:Female; D006801:Humans; D019248:Jaw Fixation Techniques; D016015:Logistic Models; D008297:Male; D008334:Mandible / Q000002:abnormalities / Q000601:surgery*; D019186:Mandibular Advancement / Q000009:adverse effects* / Q000379:methods*; D008875:Middle Aged; D019857:Osteogenesis, Distraction / Q000009:adverse effects; D010027:Osteotomy / Q000009:adverse effects; D063173:Retrognathia / Q000601:surgery; D012189:Retrospective Studies; D017678:Sex Distribution; D020886:Somatosensory Disorders / Q000209:etiology*; D061221:Trigeminal Nerve Injuries; D055815:Young Adult