. 2023 May 29;23:339. doi: 10.1186/s12903-023-03036-5

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)

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)

(N) Number of samples, *(I): the deepest landmark of interradicular bone, MR Mesial root