Article ID Journal Published Year Pages File Type
5638933 International Journal of Oral and Maxillofacial Surgery 2016 6 Pages PDF
Abstract

This study evaluated the bite force, electromyographic activity, and mandibular mobility in patients undergoing surgery for facial fracture treatment that required a coronal approach. Ten men were divided into two groups: group I, coronal approach with pre-auricular extension (n = 4, average age 34.5 years); group II, coronal approach (n = 6, average age 24.8 years). The maximum bite force was measured using a dynamometer and mandibular mobility using a calliper. The electromyographic activity of the right masseter (RM), left masseter (LM), right temporal (RT), and left temporal (LT) muscles was evaluated using a Myosystem-Br1 apparatus. Patients were evaluated at 1, 2, 3, and 6 months after surgery. Data were analysed using the repeated measures test (SPSS 21.0; P ≤ 0.05). Statistically significant differences were found for electromyographic activity at rest (group II: LM P = 0.00), left laterality (group I: RT P = 0.02; group II: RT P = 0.04), and maximum voluntary contraction (group I: RM P = 0.04 and RT P = 0.04; group II: RM P = 0.05, LM P = 0.00, and LT P = 0.01 and for maximum molar bite force in the right (group I, P = 0.00; group II, P = 0.01) and left (group II, P = 0.01) molar regions. The subjects regained electromyographic activity, maximum bite force, and mandibular mobility throughout the period evaluated.

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