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Table 1 Inter- and intra-examiner reproducibility for natural and artificial anterior teeth among the methods used for canal length determination through Intraclass Correlation Coefficient calculation

From: Use of artificial primary teeth for endodontic laboratory research: experiments related to canal length determination

Methods for canal length determination Intraexaminer reliability Interexaminer reliability
Examiner 1 Examiner 2 1st evaluation 2nd evaluation
ICC (95% CI) ICC (95% CI) ICC (95% CI) ICC (95% CI)
Natural anterior teeth (n = 30)
 Radiographic 0.983
(0.966 to 0.992)
0.993
(0.986 to 0.997)
0.921
(0.839 to 0.962)
0.923
(0.832 to 0.964)
 Mini Apex 0.974
(0.945 to 0.987)
0.992
(0.983 to 0.996)
0.909
(0.818 to 0.956)
0.943
(0.884 to 0.972)
 Root ZX 0.994
(0.987 to 0.997)
0.988
(0.973 to 0.995)
0.959
(0.916 to 0.980)
0.959
(0.916 to 0.980)
Artificial anterior teeth (n = 30)
 Radiographic 0.982
(0.958 to 0.992)
0.968
(0.934 to 0.985)
0.939
(0.729 to 0.979)
0.960
(0.838 to 0.985)
 Mini Apex 0.789
(0.603 to 0.894)
0.949
(0.895 to 0.975)
0.870
(0.746 to 0.935)
0.809
(0.637 to 0.905)
 Root ZX 0.895
(0.791 to 0.949)
0.947
(0.891 to 0.974)
0.760
(0.557 to 0.878)
0.709
(0.475 to 0.850)
  1. ICC Intraclass correlation coefficients, 95% CI 95% confidence intervals