Relationship between cervical angle and temporomandibular disorders in young and middle-aged population

Objective To verify temporomandibular disorders (TMDs) and cervical angles in a young and middle-aged population.Methods Ninety participants were included, 45 of whom had TMDs. The participants were diagnosed according to the Research Diagnostic Criteria for TMDs. Lateral cervical radiographs were taken, and relevant cervical angles were measured. The general characteristics of the TMD group and control group were analyzed using chi-square analysis, and the relationship between cervical angles and TMDs was evaluated using the unpaired t-test.Results The decrease in C2–C7 Cobb and increase in the posterior occipitocervical angle (POCA) were associated with the incidence of TMDs (p < 0.0001).Conclusion This study revealed that the cervical angle was related to TMDs. People with a long-time habit of head bending posture had a decrease in C2–C7 Cobb and an increase in the POCA. This group of people was more likely to develop TMDs.