Quantitative sensory testing of mandibular somatosensory function following orthognathic surgery - A pilot study in Chinese with Class III malocclusion

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  • Jiayi He, Nanjing Medical University, Nanjing, China, China
  • Xin Chen, Nanjing Medical University, Nanjing, China, China
  • Hua Yuan, Nanjing Medical University, Nanjing, China, China
  • Ping Zhang, Nanjing Medical University, Nanjing, China, China
  • Hongbing Jiang, Nanjing Medical University, Nanjing, China, China
  • Kelun Wang
  • Peter Svensson

Background: Somatosensory changes after sagittal split ramus osteotomy (SSRO) have not been fully studied in Chinese patients by the latest technologies. Objective: To provide a comprehensive analysis of somatosensory function at the lower lip and chin at different time points following SSRO in a Chinese population. Methods: A total of 22 patients (18–27 years; nine men) with skeletal III malocclusion and scheduled for SSRO were recruited. Quantitative sensory testing (QST) was performed at pre-operation (baseline), 1 week (1W), 1, 3 and 6 months (1M, 3M, 6M) post-operatively. Cold detection threshold (CDT), warm detection threshold (WDT), cold pain threshold (CPT), heat pain threshold (HPT), mechanical detection threshold (MDT), mechanical pain threshold (MPT), pressure pain threshold (PPT) and two-point discrimination threshold (2PD) were tested at the lower lip and chin. Results: Except for PPT at both test sides at 1W and 1M, all QST values indicated a significantly reduced sensitivity (p <.05). All values had returned to baseline values at 3M with exception of HPT at the right chin which, however, had recovered at 6M (p >.05). Conclusions: Somatosensory function at the lower lip and chin appears to be fully recovered in the majority of young Chinese adults 6 months after SSRO for skeletal class III malocclusion.

Original languageEnglish
JournalJournal of Oral Rehabilitation
Pages (from-to)160-169
Publication statusPublished - Feb 2022

    Research areas

  • FLAP, GENDER, INFERIOR ALVEOLAR NERVE, INJURY, PAIN, RECOVERY, REGION, SAGITTAL SPLIT OSTEOTOMY, SITE, THRESHOLDS, altered somatosensory function, inferior alveolar nerve, quantitative sensory testing, sagittal split ramus osteotomy, sensory recovery

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