颧眶复合体孤立骨折手术治疗后6个月期间的咬合力、肌电图及下颌骨活动度。

Bite force, electromyography, and mandible mobility during the 6-month period after surgical treatment for isolated fractures of the zygomatico-orbital complex.

作者信息

Ribeiro Michel Campos, Regalo Simone Cecilio Hallak, Pepato André Oliveira, Siéssere Selma, de Souza Luiz Gustavo, Sverzut Cássio Edvard, Trivellato Alexandre Elias

机构信息

Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.

出版信息

Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011 Apr;111(4):e1-7. doi: 10.1016/j.tripleo.2010.11.009. Epub 2011 Feb 16.

DOI:10.1016/j.tripleo.2010.11.009

PMID:21330166

Abstract

OBJECTIVE

The aim of this study was to identify the behavior of masticatory muscles after fractures of the zygomatico-orbital complex (ZOC) and subsequent surgical treatment, by using analyses of bite force, electromyography (EMG), and mandible mobility during a 6-month period after surgery.

STUDY DESIGN

Five patients with fractured ZOCs treated surgically by using an intraoral approach and fixation exclusively in the region of the zygomaticomaxillary buttress were evaluated. The control group included 12 other patients. During postoperative follow-up, bite force, mandible mobility, and EMG analysis of the masticatory muscles were evaluated.

RESULTS

There was an increase in bite force with time, but a decline in EMG activity during the same period. In the mandible mobility analysis, only maximum mouth-opening values increased significantly after the surgical treatment.

CONCLUSIONS

The masticatory musculature, according to bite force and EMG, returned to its normal condition by the second month after surgery, and maximum mouth opening was observed after the first month.

摘要