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Journal of Oral & Facial Pain and Headache
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J Orofac Pain 30 (2016), No. 2     20. May 2016
J Orofac Pain 30 (2016), No. 2  (20.05.2016)

Page 134-138


Relationship Between Orthodontics and Temporomandibular Disorders: A Prospective Study
Ortega, Ana Carolina Bannwart Antunes / Pozza, Daniel Humberto / Rodrigues, Luciane Lacerda Franco Rocha / Guimarães, Antônio Sergio
Aims: To investigate the possible relationship between the orthodontic treatment of Class II malocclusion and the development of temporomandibular disorders (TMD).
Methods: A total of 40 patients was evaluated at four time points: the day before the start of treatment employing bilateral Class II elastics (baseline), as well as at 24 hours, 1 week, and 1 month after the start of treatment. The development of TMD pain complaints in the orofacial region and changes in the range of mouth opening were assessed at these times. Shapiro-Wilk, McNemar, and Friedman tests with 5% significance level were used to analyze the data.
Results: The treatment produced pain of a transitory, moderate intensity, but there was no significant change from baseline after 1 month. There were no restrictions in the range of jaw motion or any evidence of limitations in mouth opening.
Conclusion: Orthodontic treatment with bilateral Class II elastics does not cause significant orofacial pain or undesirable changes in the range of mouth opening. Furthermore, this modality of orthodontic treatment was not responsible for inducing TMD.

Keywords: Class II malocclusion, intermaxillary elastics, orofacial pain, orthodontic treatment, temporomandibular disorders