Ratio between maximum jaw opening and lateral excursion in Brazilians with and without temporomandibular disorder
DOI:
https://doi.org/10.5585/21.2022.23393Keywords:
Temporomandibular joint, Temporomandibular joint disorders, Joint range of motion, Mandible.Abstract
Background: Mandibular movements (MM) can offer important information regarding temporomandibular joint health.
Objective: Evaluate MM and the ratio between maximum jaw opening and mandibular lateral excursion in Brazilians with and without temporomandibular disorder (TMD).
Methods: A cross-sectional study was conducted with 801 individuals between five and 80 years. All individuals answered a screening questionnaire; and MM were measured using digital calipers. The Mann-Whitney test was used to compare the differences between the sexes and groups with and without TMD. The Kruskal-Wallis test was used to determine differences in MM among age groups.
Results: MM were smaller in individuals with TMD than in those without TMD. The ratio between jaw opening and lateral excursion was 5.23 in women without TMD and 5.59 in women with TMD. In males, the ratio was 4.75 and 5.52 in individuals without and with TMD, respectively.
Conclusion: MM are smaller in Brazilians with TMD, whereas the ratio between jaw opening and lateral excursion is larger.
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