Relationship between Cervical Spine and Skeletal Class II in Subjects with and without Temporomandibular Disorders

Table 3

Absolute and percent frequencies of the C1-C2 distance value for each ANB score. ANB scores are 5 to 9°/10°. C1-C2 values are divided into abnormally low, normal, and abnormally high. Class II is divided on the basis of the presence or not of TMD.

TMD	ANB	C1-C2 space
	Value	Abnormally low (<4.5 mm)	Normal	Abnormally high (>4.5 mm)	Total
Absent	5	2	11	4	17
	6	2	5	1	8
	7	0	4	0	4
	9	0	4	0	4
	Total	4	24	5	33
		0.12	0.73	0.15	1.0
Present	5	3	11	0	14
	6	3	5	1	9
	7	0	1	0	1
	9	0	1	0	1
	10	0	1	0	1
	Total	6	19	1	26
		0.23	0.73	0.04	1.0