Radiographic Position of Impacted Mandibular Third Molars and Their Association with Pathological Conditions

Table 2

Frequency and percentage of complications based on impaction depth of mandibular third molars.

Pell and Gregory (occlusal surface)	Root resorption			Distal caries			Pathologic lesions			Relation with the IAC
	n (%)	OR (95% CI)	value	n (%)	OR (95% CI)	value	n (%)	OR (95% CI)	value	n (%)	OR (95% CI)	value
A	36 (2.2)	1	—	147 (9.2)	1	—	85 (5.3)	1	—	379 (23.7)	1	—
B	157 (9.8)	4.78 (3.31,7.08)	<0.001	47 (2.2)	0.24 (0.17,0.34)	<0.001	22 (1.4)	0.21 (0.13,0.34)	<0.001	578 (36.1)	2.72 (2.17,3.41)	<0.001
C	59 (3.7)	9.74 (6.17,15.58)	<0.001	1 (0.1)	0.04 (0.01,0.14)	<0.001	12 (0.8)	0.54 (0.28,0.98)	0.057	122 (7.6)	2.2 (1.52,3.22)	<0.001

A is considered as the reference level.