Published in:
01-03-2021 | Craniomandibular Dysfunction and Stress | Original Article
Association between convergence insufficiency and temporomandibular disorder cross-sectional study
Authors:
Douglas Meira dos Santos, Fabiano Politti, Ludmila Menezes Alves de Azevedo, Rita de Cassia das Neves Martins, Felipe Cunha Ricci, Kelly Sayuri Yun Masuda, Erika Maria Muramoto do Nascimento, Itana Lisane Spinato, Cid Andre Fidelis de Paula Gomes, Daniela Aparecida Biasotto-Gonzalez
Published in:
Clinical Oral Investigations
|
Issue 3/2021
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Abstract
Objectives
Evaluate whether there is an association between convergence insufficiency and temporomandibular disorder (TMD) and whether there is an association between pain and range of motion in different degrees of TMD.
Methods
We evaluated 138 individuals with TMD and 46 without TMD using the Research Diagnostic Criteria for temporomandibular disorders, the Fonseca Anamnestic Index (FAI), Numeric Pain Rating Scale, and the measurement of mandibular range of motion (ROM). Convergence insufficiency was diagnosed using the convergence test and Convergence Insufficiency Symptom Survey. Analysis of variance was used to compare age and mandibular ROM. The Kruskal–Wallis was used to compare mandibular ROM and pain between groups. The chi-square test was used to evaluate associations between TMD subgroups and the FAI, sex, and ocular convergence.
Results
The majority of individuals without TMD did not exhibit convergence insufficiency. The frequency convergence insufficiency was significantly higher among individuals with severe TMD (p < 0.003). Mean pain severity differed between individuals with and without TMD. Mandibular ROM diminished with the increase in TMD severity.
Conclusions
Convergence insufficiency, age, the increase in pain, and the reduction in mandibular range of motion were associated with the degrees of TMD severity. Despite the significant associations between convergence insufficiency and both pain and TMD severity, these variables cannot be indicated as predictive factors due to the low variability in the linear regression analysis.
Clinical relevance
The present findings can assist in decision making regarding the treatment of severe TMD and the evaluation of ocular convergence.