Table 5.
Muscle thickness differences between TMD subgroups based on DC/TMD.
| Unit: mm | Arthrogenous TMD (n = 32) Mean ± SD |
Myogenous TMD (n = 31) Mean ± SD |
Mixed TMD (n = 33) Mean ± SD |
p-value | ||
|---|---|---|---|---|---|---|
| Upright position | Masseter m. | Resting | 11.03 ± 32 | 12.02 ± 2.81 | 10.47 ± 3.05 | 0.122 |
| Clenching | 13.96 ± 3.74 | 14.88 ± 3.27 | 13.33 ± 3.37 | 0.207 | ||
| Temporal m. | Resting | 7.38 ± 1.87 | 8.37 ± 2.26 | 7.98 ± 1.71 | 0.135 | |
| Clenching | 7.90 ± 1.99 | 8.81 ± 2.38 | 8.47 ± 1.84 | 0.220 | ||
| Supine position | Masseter m. | Resting | 11.29 ± 1.85 | 11.89 ± 2.07 | 10.59 ± 3.03 | 0.098 |
| Clenching | 13.14 ± 2.83 | 14.06 ± 2.84 | 13.28 ± 3.54 | 0.454 | ||
| Temporal m. | Resting | 7.96 ± 2.54 | 8.58 ± 2.20 | 8.11 ± 1.72 | 0.505 | |
| Clenching | 8.03 ± 1.83 | 8.89 ± 2.21 | 8.38 ± 1.72 | 0.204 | ||
The results were obtained using t-tests. TMD, temporomandibular disorder; m, masseter muscle; statistical significance was set at p < 0.05. There was no significant difference in muscle thickness between the TMD subgroups (all p > 0.05).