Table 2 Temporomandibular Disorders (TMD) symptoms and signs and bite force measurement between the two pain groups
Fibromyalgia | Pain amplification syndrome | Total % | p value | |
|---|---|---|---|---|
n (40) | 12 | 28 | 100% | |
TMD symptoms (25) | 9 | 16 | 62.5 | p = 0.4774 |
Pain in the face (13) | 6 | 6 | 30 | NS |
Pain during mastication (7) | 1 | 6 | 17.5 | NS |
Tiredness during mastication (18) | 6 | 11 | 42.5 | NS |
Soft tissue swelling over the TMJ (7) | 5 | 2 | 17.5 | p = 0.0175* |
TMJ sounds (8) | 2 | 6 | 20 | NS |
TMD signs | ||||
Pain on function (17) | 6 | 10 | 40 | NS |
Opening (14) | 4 | 9 | 32.5 | NS |
Protrusion (7) | 2 | 5 | 17.5 | NS |
Right laterotrusion (12) | 5 | 6 | 27.5 | NS |
Left laterotrusion (7) | 3 | 4 | 17.5 | NS |
Pain on palpation (36) | 12 | 24 | 90 | NS |
Number of painful sites | ||||
0 (4) | 0 | 4 | 10 | |
1 (2) | 0 | 2 | 5 | |
2 (0) | 0 | 0 | 0 | |
3 (3) | 0 | 3 | 7.5 | |
4 (11) | 4 | 7 | 27.5 | |
5 (3) | 2 | 1 | 7.5 | |
6 (17) | 6 | 11 | 42.5 | |
Frequency of 4 or more painful sites (31) | 100% | 67.80% | 77.5 | p = 0.0375* |
Maximal mouth opening capacity (mean) | 51.58 mm | 47.85 mm | NS | |
Bite force (Newton) | ||||
Anterior | 154.6 | 133.3 | NS | |
Right side | 344.9 | 334.9 | NS | |
Left side | 343.7 | 357 | NS | |