Table 4 Accuracy of the methods used for canal length determination through Intraclass Correlation Coefficient calculation and Bland-Altman analysis for natural and artificial posterior teeth
Methods for canal length determination | ICC (95% CI) | Bland-Altman analysis | ||
|---|---|---|---|---|
Mean difference | Upper limit | Lower limit | ||
Natural posterior teeth (n = 78 canals in 21 teeth) | ||||
Radiographic | 0.685 (0.545 to 0.787) | −0.40 | 2.90 | −3.70 |
Mini Apex | 0.941 (0.907 to 0.962) | 0.18 | 1.54 | −1.19 |
Root ZX | 0.958 (0.935 to 0.973) | 0.14 | 1.33 | −1.05 |
Artificial posterior teeth (n = 63 canals in 21 teeth) | ||||
Radiographic | 0.625 (−0.037 to 0.853) | −1.70 | 1.00 | −4.40 |
Mini Apex | 0.959 (0.914 to 0.978) | 0.29 | 1.45 | −0.88 |
Root ZX | 0.947 (0.855 to 0.975) | 0.40 | 1.64 | −0.85 |