Table 3.
Masseter and temporal muscle thickness during resting and clenching in patients with TMD.
| Total TMD patients (n = 96) | Resting Mean ± SD |
Clenching Mean ± SD |
p-value (resting vs. clenching) | Thickness differencea | |
|---|---|---|---|---|---|
| Unit: mm | Mean ± SD | ||||
| Upright position | Masseter m. | 11.16 ± 3.03 | 14.04 ± 3.47 | < 0.001*** | 2.92 ± 2.24 |
| Temporalis m. | 7.91 ± 1.98 | 8.39 ± 2.08 | 0.103 | 0.48 ± 1.21 | |
| Supine position | Masseter m. | 11.24 ± 2.42 | 13.49 ± 3.09 | < 0.001*** | 2.25 ± 1.90 |
| Temporalis m. | 8.21 ± 2.16 | 8.43 ± 1.94 | 0.464 | 0.22 ± 0.76 | |
The results were obtained using t-tests. TMD, temporomandibular disorder; m, masseter muscle.
aDifference between muscle thickness at clenching and that at rest. Statistical significance was set at p < 0.05. *p < 0.05, **p < 0.01, ***p < 0.001. The significant values are indicated in bold font.