Preoperative Estimation of Endodontic Working Length with Cone-Beam Computed Tomography and Standardized Paralleling Technique in comparison to Its Real Length

Table 4

Comparison between the measurements obtained by digital paralleling and CBCT techniques within a range of 1 mm difference from the gold standard.

		Accuracy of digital paralleling technique by 1 mm		Total	value
		Yes	No
Accuracy of CBCT by 1 mm	Yes	52	6	58	0.09
	No	1	1	2
Total		53	7	60

Chi-square test. Not significant.