MRI findings in 38 patients with JIA receiving systemic therapy and having TMJ involvement.
| Initial MRI | Followup MRI | p | |
|---|---|---|---|
| All TMJ, n = 76 | |||
| Inflammation | |||
| Frequency | 46/76 (60.5) | 40/76 (53.6) | 0.392 * |
| Grade | 0.009 ** | ||
| 0 | 30/76 (39.5) | 36/76 (47.4) | |
| 1 | 28/76 (36.8) | 36/76 (47.4) | |
| 2 | 14/76 (18.4) | 4/76 (5.3) | |
| 3 | 4/76 (5.3) | ||
| Deformation | |||
| Frequency | 37/76 (48.7) | 35/76 (46.1) | 0.749 * |
| Grade | 0.114 ** | ||
| 0 | 39/76 (51.3) | 41/76 (53.9) | |
| 1 | 23/76 (30.3) | 27/76 (35.5) | |
| 2 | 9/76 (11.8) | 5/76 (6.6) | |
| 3 | 5/76 (6.6) | 3/76 (3.9) | |
| TMJ without inflammation at baseline, n = 30 | |||
| Inflammation | |||
| Frequency | 0/30 (0) | 10/30 (33.3) | < 0.001 * |
| Grade | 0.002 ** | ||
| 0 | 30/30 (100) | 20/30 (66.7) | |
| 1 | 8/30 (26.7) | ||
| 2 | 2/30 (6.7) | ||
| Deformation | |||
| Frequency | 13/30 (43.3) | 17/30 (56.7) | 0.303 * |
| Grade | |||
| 0 | 17/30 (56.7) | 13/30 (43.3) | 0.375 ** |
| 1 | 8/30 (26.7) | 13/30 (43.3) | |
| 2 | 4/30 (13.3) | 3/30 (10.0) | |
| 3 | 1/30 (3.3) | 1/30 (3.3) | |
| TMJ with inflammation at baseline, n = 46 | |||
| Inflammation | |||
| Frequency | 46/46 (100) | 30/46 (65.2) | < 0.001 * |
| Grade | |||
| 0 | 0/46 (0) | 16/46 (34.8) | < 0.001 ** |
| 1 | 28/46 (60.9) | 28/46 (60.9) | |
| 2 | 14/46 (30.4) | 2/46 (4.3) | |
| 3 | 4/46 (8.7) | ||
| Deformation | |||
| Frequency | 24/46 (52.2) | 18/46 (39.1) | 0.210 * |
| Grade | |||
| 0 | 22/46 (47.8) | 28/46 (60.9) | 0.011 ** |
| 1 | 15/46 (32.6) | 15/46 (30.4) | |
| 2 | 5/46 (10.9) | 2/46 (4.3) | |
| 3 | 4/46 (8.7) | 2/46 (4.3) |
Values are n/N (%) unless otherwise specified.
↵Comparison between MRI studies with * chi-square test, ** Wilcoxon test. TMJ: temporomandibular joint; JIA: juvenile idiopathic arthritis; MRI: magnetic resonance imaging.