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