The Electrical Activity of the Temporal and Masseter Muscles in Patients with TMD and Unilateral Posterior Crossbite

Table 2

Electrical activity of muscles at clinical mandibular rest position depending on transversal malocclusion.

Region	Variable	Gender	Group
			No malocclusion			Crossbite
				Mean	SD		Mean	SD
Temporal muscles	Electrical activity V/V%	Females	54	4.07	2.02	22	7.08	6.45
		Males	46	4.08	2.06	28	7.14	5.10
		Total	100	4.07	2.03	50	7.11	5.67
	Asymmetry index %	Females	54	21.20	9.48	22	36.35	12.71
		Males	46	17.12	9.00	28	23.77	15.60
		Total	100	19.33	9.44	50	29.30	15.59
Masseter muscles	Electrical activity V/V%	Females	54	2.12	0.89	22	1.78	0.98
		Males	46	2.13	1.09	28	2.10	0.57
		Total	100	2.12	0.98	50	1.96	0.79
	Asymmetry index %	Females	54	23.03	14.97	22	45.78	19.99
		Males	46	31.63	14.14	28	32.01	17.37
		Total	100	26.99	15.15	50	38.07	19.63
Temporal/masseter muscles	Torque coefficient %	Females	54	7.20	7.66	22	19.43	13.53
		Males	46	4.37	3.95	28	10.73	12.83
		Total	100	5.90	6.36	50	14.56	13.72