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Year : 2021  |  Volume : 11  |  Issue : 3  |  Page : 108-113

Evaluation of signs and symptoms of temporomandibular disorders in children and adolescents, before and after rapid maxillary expansion

1 Department of Orthodontics, Bauru Dental School, University of São Paulo, São Paulo, Brazil
2 UNINGA Center, Maringa/PR, Brazil
3 Responsible for the area of TMD and Orofacial Pain of Hospital USP-São Paulo, Brazil and Responsible for the Master's Program in TMD/Orofacial Pain at the São Leopoldo Mandic Dental Research Center – Campinas, São Paulo, Brazil

Correspondence Address:
Dr. Marcelo Soares Correa
Alameda Octávio Pinheiro Brisolla 9-75, Bauru-SP
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jid.jid_75_20

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Objective: The purpose of this study was to evaluate the presence of temporomandibular disorder (TMD) signs and symptoms before and after rapid maxillary expansion (RME), in patients with posterior crossbite. Materials and Methods: The sample was comprised of 22 individuals (13 girls, 9 boys), with ages varying from 7 to 14 years (mean: 9.1 years), with posterior crossbite. They were all treated with RME using the Hyrax appliance. They were submitted to a questionnaire of the European Academy of the Craniomandibular Disorder for evaluation of the presence of signs and symptoms of TMD at five different times: T0, T1, T2, T3, Tf (before treatment starts, 15 days after the beginning of the activations, 4, 8, and 10 months after installation of the Hyrax appliance, respectively). If any of the answers to the questionnaire were YES, research diagnosis criteria for temporomandibular disorders - axis I (RDC/TMD-axis I) was applied. Descriptive statistics, Chi-square, and Fisher's exact tests were applied. Results: The initial prevalence of TMD signs and symptoms was 18%. At T2, there was statistically significant improvement (P = 0.046) of TMD signs and symptoms in relation to T0. There was no statistically significant association between sex and TMD signs and symptoms in the five stages that were evaluated. Conclusions: RME temporarily influenced the TMD signs and symptoms in T2. However, there was a return of the TMD signs and symptoms 10 months after installation of the Hyrax appliance.

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