Prevalence and Morphology of C-Shaped Canals: A CBCT Analysis in a Korean Population

Table 5

Mean values of the mesial, middle, and distal lingual wall thickness at the orifice and 5 mm from the apex by configuration type.

	Orifice	5 mm from apex	value
Mesial zone thickness of the lingual wall
C1			0.222
C2			0.463
C3a			0.365
C3b			0.036
Middle zone thickness of the lingual wall
C1			<0.001
C2			<0.001
C3a			<0.001
Distal zone thickness of the lingual wall
C1			<0.001
C2			0.038
C3a			0.042
C3b			0.274

Variables are presented as the , and values were computed using the Mann–Whitney test. A value < 0.05 was considered to indicate statistical significance.