Fig. 1
From: Influence of bone anatomical morphology of mandibular molars on dental implant based on CBCT
Determination of the measurement plane. a The horizontal plane was adjusted to the neck of the lower first molar and the cross-sectional plane passed through the midpoint of the tested tooth mesiodistally. b The improved cross-sectional plane aligned along the long axis of the tooth. c The selected measurement plane paralleled the improved cross-sectional plane when the plane showed complete root in the single-rooted molar or the mesial and distal root bifurcations displayed complete mesial root