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Occurrence of Malocclusion in Patients with Orofacial Pain and Temporomandibular Disorders.

AIM
This study aims to investigate the occurrence of malocclusion in patients with orofacial pain and temporomandibular disorders (TMDs).


MATERIALS AND METHODS
A total of 437 standard orthodontic screening forms at a craniofacial pain TMD center were utilized to collect the data for this retrospective study. In addition to patient's demographics and Angle's molar classification, the following data were collected: Overjet (OJ), overbite (OB), mandibular range of motion, and whether or not there was a posterior crossbite or prior history of orthodontic therapy. Analysis of variance (ANOVA) and chi-square tests were then used to detect any statistical significant difference of the secondary variables' distribution among the three malocclusion groups.


RESULTS
The majority of the studied population sample had a class I molar relationship (70.9%), followed by class II (21.1%) and class III molar relationship (8%). Overjet and OB were significantly increased for class II molar relationship group (p < 0.001), where no statistical differences could be identified for the mandibular range of motion between the groups. The prevalence of right and left posterior crossbite was about 12% for both, and most of the crossbites presented within class I molar group.


CONCLUSION
Class I followed by class II molar relationships were found to be the most occurring relationship in the studied population. Posterior crossbite presented in 12% of cases and mostly affected subjects with class I molar relationship.


CLINICAL SIGNIFICANCE
These findings would aid in recognizing the studied population's orthodontic presentation and support the assessment of their transverse interventional needs.