The purpose of this study was to investigate the association between clinical signs and MRI findings in adolescent patients with temporomandibular disorders (TMD). The subjects were 126 patients (20 males and 106 females),8-20 years of age, who visited the Pedodontic Clinic of Kagoshima University, Dental Hospital with a complaint of TMD.
Anterior disk displacement (ADD) was observed in 113 of the 126 patients (89.7%) and joint effusion was observed in 51 of the 126 patients (40.5%).
The prevalence of temporomandibular joint (TMJ) pain was significantly higher (p<0.001) in the ADD-without-reduction group than those in the other groups.
The prevalence of TMJ pain was significantly higher (p<0.001) among patients with joint effusion than that among patients without joint effusion.
The prevalence of the TMJ sound was significantly higher (p<0.001) in the ADD-with-reduction group than those in the normal and ADD-without-reduction groups.
Joint effusion was detected to be significantly higher (p<0.001) in the ADD-without-reduction group than those in the normal and ADD-with-reduction groups. The prevalence of joint effusion in the ADD-with-reduction group was significantly higher (p<0.05) than that in the normal group.