Electromyographic Analysis of Masticatory Muscles in Cleft Lip and Palate Children with Pain-Related Temporomandibular Disorders

Table 2

The occlusal characteristics in the children studied.

Variable		TMD-pain group		Non-TMD group
			%		%
Vertical overlap	Normal^1	12	38.7	19	59.4
	Increased^2	7	22.6	7	21.9
	Absence^3	12	38.7	6	18.7
Overjet	Normal^4	8	25.8	13	40.6
	Increased^5	7	22.6	7	21.9
	Anterior crossbite	17	54.8	13	40.6
Posterior crossbite	No	7	22.6	12	37.5
	Yes	24	77.4	20	62.5
Angle class	I	10	32.3	17	53.1
	II	7	22.6	5	15.6
	III	14	45.2	10	31.2
Lateral open bite	No	22	71.0	24	75.0
	Yes	9	29.0	8	25.0

¹Upper incisors is one-third of the clinical crown of lower incisors; ²categorized as ≥3 mm; ³the overlap absence (anterior open bite); ⁴upper central incisors did not exceed 3 mm; ⁵categorized as ≥3 mm.