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Analysis of associations between the vertical extension of mandibular movement and different types of temporomandibular disorder

Cid Andre Fidelis de Paula Gomes, Fabiano Politti, Tabajara de Oliveira Gonzalez, Yasmin El Hage, Eric Edmur Camargo Arruda, Ana Paula Amaral, Daniela Aparecida Biasotto Gonzalez

Med Sci Tech 2012; 53(1): RA37-41

ID: 883050


Background:    The aim of the present study was to compare measures of the vertical extension of mandibular movement among individuals with different types of temporomandibular disorder (TMD) diagnosed based on the Research Diagnostic Criteria for Temporomandibular Disorders – Axis I.
    Material/Methods:    An observational cross-sectional study was performed with 140 consecutively recruited individuals who sought treatment at a university clinic. Thirty-two individuals were excluded based on the eligibility criteria and 108 individuals of both sexes composed the sample (mean age: 27.88±5.62 years). The individuals were diagnosed and allocated to 2 groups: control group (without TMD) and TMD group [divided into 3 categories – I (myofascial pain), II (disk displacement) and III (arthralgia, osteoarthritis and osteoarthrosis)]. The vertical extension of mandibular movement was assessed using 3 measures (maximal opening without help and without pain; maximal opening without help; maximal opening with help).
    Results:    A statistically significant association was found between female sex and TMD (χ2=7.60, gl.1; p=0.005). Fifty-seven individuals in the TMD group (81.42%) were diagnosed with more than 1 type of disorder: 14 individuals belonged to categories I and II, 21 belonged to categories I and III, 12 belonged to categories II and III, and 10 individuals belonged to all 3 categories. No statistically significant differences were found between the TMD categories regarding any of the 3 measures of vertical mandibular movement (p>0.05).
    Conclusions:    The findings of the present study demonstrate no differences in the vertical extension of mandibular movement among individuals with different types of temporomandibular disorder.

Keywords: Temporomandibular Joint, Temporomandibular Joint Disorders, range of motion, Diagnosis, Mandible

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