Toru Yamamoto1, Keiko Fujii-Abe2, Haruhisa Fukayama2, Hiroshi Kawahara3. 1. Section of Anesthesiology and Clinical Physiology, Department of Oral Restitution, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-4, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan. tyamamoto-kys@umin.ac.jp. 2. Section of Anesthesiology and Clinical Physiology, Department of Oral Restitution, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-4, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan. 3. Department of Dental Anesthesiology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi-ku, Yokohama-shi, Kanagawa, 230-0062, Japan.
Abstract
PURPOSE: This retrospective study investigated the relationship between the degree of neurosensory disturbance (NSD) and mandibular movement distance after sagittal split ramus osteotomy (SSRO) and assessed sensory recovery. METHODS: Lower lip hypoesthesia was evaluated at 1 week, 1 month, and 2 months after SSRO in 38 patients categorized according to the distance of mandibular movement: S group (0-7 mm; n = 17, 4 males and 13 females) and L group (7-14 mm; n = 21, 7 males, 14 females). Symptoms were evaluated by visual analog scale (VAS), tactile-threshold (SW) test, static 2-point discrimination (s-2PD) test, and current perception threshold (CPT) test. RESULTS: The two groups did not differ significantly in gender and age. The Aβ fiber results of the CPT test differed significantly between the groups at 1 week and 1 month postsurgery (P < 0.05). There were no significant differences between the groups throughout the period in terms of VAS, SW, s-2PD, Aδ fiber, and C fiber of CPT. CONCLUSIONS: Post-SSRO, the incidence of NSD in terms of tactile sensation may be greater in the L group early postoperatively. This may assist surgeons in explaining postoperative hypoesthesia to patients preoperatively.
PURPOSE: This retrospective study investigated the relationship between the degree of neurosensory disturbance (NSD) and mandibular movement distance after sagittal split ramus osteotomy (SSRO) and assessed sensory recovery. METHODS: Lower lip hypoesthesia was evaluated at 1 week, 1 month, and 2 months after SSRO in 38 patients categorized according to the distance of mandibular movement: S group (0-7 mm; n = 17, 4 males and 13 females) and L group (7-14 mm; n = 21, 7 males, 14 females). Symptoms were evaluated by visual analog scale (VAS), tactile-threshold (SW) test, static 2-point discrimination (s-2PD) test, and current perception threshold (CPT) test. RESULTS: The two groups did not differ significantly in gender and age. The Aβ fiber results of the CPT test differed significantly between the groups at 1 week and 1 month postsurgery (P < 0.05). There were no significant differences between the groups throughout the period in terms of VAS, SW, s-2PD, Aδ fiber, and C fiber of CPT. CONCLUSIONS: Post-SSRO, the incidence of NSD in terms of tactile sensation may be greater in the L group early postoperatively. This may assist surgeons in explaining postoperative hypoesthesia to patients preoperatively.
Authors: Gertjan Mensink; Albert Zweers; Ron Wolterbeek; Gertjan G J Dicker; Robert H Groot; Richard J P R van Merkesteyn Journal: J Craniomaxillofac Surg Date: 2012-03-20 Impact factor: 2.078
Authors: Joseph E Van Sickels; John P Hatch; Calogero Dolce; Robert A Bays; John D Rugh Journal: J Oral Maxillofac Surg Date: 2002-09 Impact factor: 1.895