Clinical Study
The Electrical Activity of the Temporal and Masseter Muscles in Patients with TMD and Unilateral Posterior Crossbite
Table 3
Electrical activity of muscles at maximal voluntary contraction (MVC) in intercuspal position depending on transversal malocclusion.
| Region | Variable | Gender | Group | No malocclusion | Crossbite | | Mean | SD | | Mean | SD |
| Temporal muscles | Electrical activity V/V% | Females | 54 | 117.86 | 28.11 | 22 | 82.88 | 19.33 | Males | 46 | 114.40 | 27.06 | 28 | 98.43 | 34.86 | Total | 100 | 116.27 | 27.54 | 50 | 91.59 | 29.84 | Asymmetry index % | Females | 54 | 9.95 | 8.18 | 22 | 22.10 | 11.14 | Males | 46 | 8.48 | 5.73 | 28 | 14.71 | 9.81 | Total | 100 | 9.27 | 7.16 | 50 | 17.96 | 10.95 |
| Masseter muscles | Electrical activity V/V% | Females | 54 | 131.06 | 26.23 | 22 | 76.72 | 37.22 | Males | 46 | 133.07 | 33.94 | 28 | 113.08 | 42.73 | Total | 100 | 131.99 | 29.89 | 50 | 97.08 | 43.96 | Asymmetry index % | Females | 54 | 9.07 | 5.23 | 22 | 21.72 | 12.81 | Males | 46 | 10.71 | 6.18 | 28 | 13.48 | 5.01 | Total | 100 | 9.83 | 5.72 | 50 | 17.10 | 10.06 |
| Temporal/masseter muscles | Torque coefficient % | Females | 54 | 2.77 | 1.88 | 22 | 6.62 | 4.44 | Males | 46 | 3.16 | 2.35 | 28 | 2.54 | 1.49 | Total | 100 | 2.95 | 2.11 | 50 | 4.33 | 3.72 |
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