Table 2.

Intraobserver and interobserver agreement by periapical radiography (PR) and CBCT images

Observer	PR			CBCTa			CBCTb
	1	2	3	1	2	3	1	2	3
1	0.935	0.805	0.935	1.0	0.831	0.694	0.783	0.452	0.520
2		1.0	1.0		0.898	0.847		0.627	0.480
3			1.0			0.898			0.645

^aEvaluation of the apical extension of root canal obturations (RCOs) by CBCT images.

^bDetection of voids of RCOs by CBCT images.

Both interobserver and intraobserver agreements of PR (t = 7.082, p < 0.005; t = 5.449, p < 0.05; respectively), as well as CBCT^a (t = 5.851, p < 0.005; t = 4.126, p < 0.05; respectively), were higher than those of CBCT^b, while no significant differences were observed when comparing the two agreements between PR and CBCT^a (p > 0.05).