Table 3.
Comparative muscle thickness/stiffness values of the subjects.
| Right side | Left side | p value | |
|---|---|---|---|
| Asymptomatic Controls (n = 48) | |||
| Thickness | |||
| Masseter muscle (mm) | 12.09 ± 2.10 (11.48 to 12.70) | 12.05 ± 2.09 (11.45 to 12.66) | 0.829 |
| Temporalis muscle (mm) | 5.72 ± 0.91 (5.46 to 5.99) | 5.56 ± 0.68 (5.37 to 5.76) | 0.261 |
| Lateral pterygoid muscle (mm) | 16.52 ± 1.17 (16.18 to 16.86) | 16.24 ± 1.39 (15.84 to 16.65) | 0.054 |
| Stiffness | |||
| Masseter muscle (kPa) | 9.90 ± 2.56 (9.15 to 10.64) | 9.24 ± 2.48 (8.52 to 9.95) | 0.074 |
| Temporalis muscle (kPa) | 34.48 ± 19.19 (28.91 to 40.05) | 40.52 ± 23.99 (33.55 to 47.49) | 0.115 |
| Lateral pterygoid muscle (kPa) | 33.07 ± 14.15 (28.97 to 37.18) | 32.93 ± 13.59 (28.99 to 36.88) | 0.894 |
| Patients with Unilateral Oral Facial Pain (n = 13) | |||
| Thickness | |||
| Masseter muscle (mm) | 12.21 ± 1.48 (11.31 to 13.10) | 11.71 ± 1.55 (10.77 to 12.64) | 0.087 |
| Temporalis muscle (mm) | 5.42 ± 0.83 (4.92 to 5.92) | 5.42 ± 0.63 (5.04 to 5.79) | 0.944 |
| Lateral pterygoid muscle (mm) | 14.63 ± 1.32 (13.83 to 15.42) | 14.56 ± 1.23 (13.81 to 15.30) | 0.109 |
| Stiffness | |||
| Masseter muscle (kPa) | 14.05 ± 5.62 (10.66 to 17.45) | 11.84 ± 4.35 (9.21 to 14.47) | 0.279 |
| Temporalis muscle (kPa) | 31.82 ± 16.55 (21.81 to 41.82) | 28.85 ± 10.01 (22.80 to 34.89) | 0.917 |
| Lateral pterygoid muscle (kPa) | 35.05 ± 9.88 (29.07 to 41.02) | 31.09 ± 12.42 (23.59 to 38.60) | 0.196 |
| Patients with Bilateral Oral Facial Pain (n = 37) | |||
| Thickness | |||
| Masseter muscle (mm) | 11.75 ± 1.74 (11.17 to 12.33) | 11.49 ± 1.91 (10.85 to 12.13) | 0.161 |
| Temporalis muscle (mm) | 5.36 ± 0.72 (5.12 to 5.60) | 5.26 ± 0.88 (4.97 to 5.55) | 0.377 |
| Lateral pterygoid muscle (mm) | 14.65 ± 1.38 (14.19 to 15.11) | 14.34 ± 1.37 (13.88 to 14.79) | 0.052 |
| Stiffness | |||
| Masseter muscle (kPa) | 15.64 ± 7.50 (13.13 to 18.14) | 14.46 ± 7.90 (11.83 to 17.10) | 0.074 |
| Temporalis muscle (kPa) | 34.45 ± 13.16 (30.06 to 38.84) | 40.29 ± 25.81 (31.68 to 48.89) | 0.222 |
| Lateral pterygoid muscle (kPa) | 33.82 ± 12.12 (29.78 to 37.86) | 34.97 ± 10.34 (31.52 to 38.42) | 0.236 |
*p < 0.05.
The values of continuous variables were expressed by the mean and standard deviation (95% confidence interval of mean).