Table 5 Summary of root length results in mandibular first molar
Studies | Whole tooth/ root (N) | Objective Description | Mean ± SD (Range) |
|---|---|---|---|
Gu et al. [55] | Whole tooth (25) | The length of the root was measured as the vertical distance from the anatomical root apex to the highest level of the CEJ | 13.17 ± 1.24 |
Gu et al. [58] | Whole tooth (25) | Root length: The vertical distance between the highest level of the CEJ and the root tip along the long axis of the tooth | 13.16 ± 1.24 mm |
Theye et al. [64] | Whole tooth (61) | Root length: the distance between deepest landmark of interradicular bone *(I) and root apex centroid | 9.94 ± 0.85 (8.48—11.07) |