Does orthognathic surgery improve myofacial pain in individuals with skeletal class III? One-year follow-up

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Aline Monise SebastianiNelson Luis Barbosa Rebellato

Abstract

The objective of the study was to evaluate the effect of orthognathic surgery on temporomandibular disorder (TMD) in patients with skeletal class III malocclusion. Forty-seven patients undergoing surgery were evaluated by a trained examiner using Axis I of the Research Diagnostic Criteria/TMD index, consecutively, at 3 different periods: 1 week before operation (T0), 6 months after operation (T1), and 1 year after operation (T2). Bivariate analyses were performed to compare the evaluation periods (P < .05). The prevalence of TMD in the sampled patients from T0 to T1 decreased from 30 (63.8%) to 22 (46.8%) (P = .021). Even in T2, the prevalence of TMD remained lower than that in T0, at 21 (44.7%) diagnosed patients (P = .049). The reported frequencies of myofascial pain and headache were lower in T1 and T2 than in T0 (P < .001). Decrease in the frequency of joint pain and joint sounds was observed only from T0 to T1 (P = .039 and P = .021, respectively). The mean maximum of mouth opening decreased from T0 to T1 (P < .001) and increased again at T2 (P < .001). Orthognathic surgery promoted reduction in the frequencies of myofascial pain and headache reported by patients with skeletal class III malocclusion.

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