Criteria fulfilled for the diagnosis of TMJ involvement.
| Types of Criteria | Radiologic and Clinical Criteria Fulfilled | TMJ Pathology, n = 86 Radiologic Criteria Only | Clinical Criteria Only, n = 11 (13%) |
|---|---|---|---|
| MRI, n (%) | 61 (71) | 14 (16) | |
| Contrast enhancement of synovial membrane | 51 (83.6) | 13 (92.9) | |
| Increased intraarticular fluid | 41 (67.2) | 11 (78.6) | |
| Destructive changes of the mandibular head | 39 (63.9) | 5 (35.7) | |
| Clinical criteria, n (%) | |||
| Mandibular asymmetry | 45 (74.0) | 5 (45.5) | |
| Retrognathia | 12 (19.6) | 4 (36.4) | |
| Reduced maximal mouth opening | 29 (47.5) | 3 (27.3) | |
| Asymmetric mouth opening | 2 (3.3) | 2 (18.2) | |
| Median age at diagnosis of JIA, yrs (range) | 5.09 (1.04–12.9) | 4.59 (0.61–13.35) | 6.21 (1.6–14.6) |
| Mean followup time for JIA at diagnosis of TMJ pathology, yrs (range) | 4.53 (0.08–15.44) | 4.87 (0.26–11.7) | 4.78 (0.13–15.2) |
TMJ: temporomandibular joint; MRI: magnetic resonance imaging; JIA: juvenile idiopathic arthritis.