Table 1.

Intra-rater intra-class correlation coefficient values

Measurement protocol	Volume measured	ICC	CI (lower bound)	CI (upper bound)	F -text, p values
Protocol 1: manual	Whole tooth	0.885	0.707	0.967	F (9,18) = 24.158, p < .0005
Protocol 1: manual	Roots apical to CEJ	0.904	0.749	0.973	F (9,18) = 29.406, p < .0005
Protocol 2: automated	Whole tooth	0.826	0.697	0.952	F (9,18) = 12.215, p < .0005
Protocol 2: automated	Roots apical to CEJ	0.899	0.742	0.953	F (9,18) = 27.512, p < .0005
Protocol 3: automated with refinements	Whole tooth	0.996	0.989	0.999	F (9,18) = 767.557, p < .0005
Protocol 3: automated with refinements	Roots apical to CEJ	0.904	0.751	0.973	F (9,18) = 29.406, p < .0005

CEJ = cemento-enamel junction; CI = confidence interval; ICC = intra-class correlation coefficient.