Onizawa K, Schmelzeisen R, Vogt S
Department of Stomatology, University of Tsukuba, Japan.
J Oral Maxillofac Surg. 1995 Feb;53(2):117-21; discussion 122-3. doi: 10.1016/0278-2391(95)90383-6.
The purpose was to investigate alterations in temporomandibular joint (TMJ) dysfunction after orthognathic surgery.
TMJ symptoms of preoperative patients (n = 30) were compared with those of healthy volunteers (n = 30), and changes in the symptoms were evaluated at 3- and 6-month postoperative intervals.
There was no significant difference in the incidence of TMJ sounds, deviation of mouth opening, and tenderness of TMJ and masticatory muscles between patients and volunteers. Patients did not report TMJ symptoms significantly more often than the control subjects. At both 3 and 6 months after surgery, half or more of the patients showed no change in TMJ sounds, deviation of mouth opening, or tenderness of TMJ and masticatory muscles. At each evaluation, some patients exhibited improvement of TMJ symptoms or showed changes for the worse. Findings of TMJ sounds were observed to be associated with the postoperative reduction of mandibular mobility.
These results suggest that alterations of TMJ symptoms after orthognathic surgery do not always result from the correction of malocclusion.
本研究旨在调查正颌外科手术后颞下颌关节（TMJ）功能障碍的变化情况。
将术前患者（n = 30）的TMJ症状与健康志愿者（n = 30）的症状进行比较，并在术后3个月和6个月时评估症状变化。
患者与志愿者在TMJ弹响、张口偏斜以及TMJ和咀嚼肌压痛的发生率方面无显著差异。患者报告TMJ症状的频率并不显著高于对照组。术后3个月和6个月时，半数或半数以上患者的TMJ弹响、张口偏斜或TMJ和咀嚼肌压痛无变化。每次评估时，部分患者的TMJ症状有所改善或恶化。观察到TMJ弹响与术后下颌运动度降低有关。
这些结果表明，正颌外科手术后TMJ症状的改变并非总是由错牙合矫正引起。
