title: Incidence and recovery of neurosensory disturbances after bilateral sagittal split osteotomy in different age groups: a retrospective study of 263 patients.
abstract: This study aimed to investigate the incidence of neurosensory disturbance (NSD) after bilateral sagittal split osteotomy (BSSO) in different age groups and to assess the probability of sensory recovery in patients aged <19 years, 19-30 years, and >30 years. Hypoaesthesia of the lower lip was assessed subjectively and objectively immediately after BSSO and at 1 week and 1, 6, and 12 months after BSSO. Hypoaesthesia was considered permanent if it was present 1 year after BSSO. The frequency of NSD immediately after surgery was significantly higher in older patients. The cumulative incidence of recovery at 1 year was lower and the mean time to recovery was longer in the older patients, although these differences were not statistically significant. Older age was a significant risk factor for permanent hypoaesthesia, with an incidence of 4.8% per patient aged <19 years, 7.9% per patient aged 19-30 years, and 15.2% per patient aged >30 years. These findings show that the risk of NSD after BSSO is significantly higher in older patients. These results may aid surgeons in preoperative patient counselling and in deciding the optimal age at which to perform BSSO.
authors: Department of Oral and Maxillofacial Surgery, Leiden University Medical Centre, Leiden, Netherlands.
authors: J P
authors: JP
authors: Verweij
authors: Department of Oral and Maxillofacial Surgery, Leiden University Medical Centre, Leiden, Netherlands; Department of Oral and Maxillofacial Surgery, Amphia Hospital, Breda, Netherlands.
authors: G
authors: G
authors: Mensink
authors: Mathematical Institute, Leiden University, Leiden, Netherlands; Department of Medical Statistics and Bioinformatics, Leiden University Medical Centre, Leiden, Netherlands.
authors: M
authors: M
authors: Fiocco
authors: Department of Oral and Maxillofacial Surgery, Leiden University Medical Centre, Leiden, Netherlands. Electronic address: J.P.R.van_Merkesteyn@lumc.nl.
authors: J P R
authors: JP
authors: van Merkesteyn
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D006987:Hypesthesia / Q000453:epidemiology* / Q000209:etiology; D015994:Incidence; D008047:Lip Diseases / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D059229:Osteotomy, Sagittal Split Ramus / Q000009:adverse effects* / Q000379:methods; D011183:Postoperative Complications / Q000453:epidemiology*; D020127:Recovery of Function; D012189:Retrospective Studies
keywords: hypoaesthesia; inferior alveolar nerve; orthognathic surgery; risk; sagittal split osteotomy