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

Publication date: Available online 16 April 2018
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Aline Monise Sebastiani, Paola Fernanda Cotait de Lucas Corso, Daniel Bonotto, Juliana Feltrin de Souza, Delson João da Costa, Rafaela Scariot, Nelson Luis Barbosa Rebellato
Objective: The objective of the present study was to evaluate the effect of orthognathic surgery on temporomandibular disorder (TMD) in patients with skeletal class III malocclusion. Study design: Forty-seven patients undergoing surgery were evaluated using Axis I of the Research Diagnostic Criteria/TMD index by a trained examiner, consecutively, at three 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<0.05). Results: The prevalence of TMD in the sampled patients from T0 to T1 decreased from 30 (63.8%) to 22 (46.8%) (p=0.021). Even in T2, the prevalence of TMD remained lower than that in T0, at 21 (44.7%) diagnosed patients (p=0.049). The reported frequencies of myofascial pain and headache were lower in T1 and T2 than in T0 (p<0.001). A decrease in the frequency of joint pain and joint sound was observed only from T0 to T1 (p=0.039 and p=0.021, respectively). The mean maximum mouth-opening diameter decreased from T0 to T1 (p<0.001) and increased again at T2 (p<0.001). Conclusion: Orthognathic surgery promoted a reduction in the frequencies of myofascial pain and headache reported by patients with skeletal class III malocclusion.



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