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Age distribution of East Asian TMD patients and age-related differences in DC/TMD axis I findings
Adrian Ujin Yap1,2,3, Jie Lei1,4,5, Ji Woon Park6,7,8
1Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.
Objectives:
The pattern of age distribution in East Asian temporomandibular disorder (TMD) patients and age-related differences in DC/TMD diagnostic subtypes/categories were evaluated.
Subjects And Methods:
TMD patients from two University-based centers in China and South Korea were enrolled. Axis I physical diagnoses were rendered according to DC/TMD. Patients were categorized into six age groups (15-24, 25-34, 35-44, 45-54, 55-64, and 65-84 years; Groups A-F respectively).
Results:
Youths/young adults (Groups A-C) formed 74.1% of TMD patients. TMJ disc displacements (74.9%), arthralgia (49.2%), and degenerative joint disease [DJD] (36.8%) were the most common TMD subtypes. The majority had combined (54.0%) and chronic (58.5%) TMDs. Youths/young adults and middle-aged/old adults had substantially lower frequencies of merely pain-related (6.2-14.5%) and intra-articular (13.8-16.8%) TMDs correspondingly. "Being female" increased the prospects of pain-related/combined TMDs by 96%/49%, respectively.
Conclusions:
East Asian TMD patients comprised mostly of youths/young adults who had an alarmingly high prevalence of TMJ DJD.
