Fig. 2

Schematic Illustration of angular measurements (°) of maxillary second molar (1), maxillary first molar (2), and central incisor (3). The angle between the tooth long axis (passing trough the mesiobuccal cusp and mesiobuccal root’s apex for the first and the second molar; passing trough the incisal edge and root’s apex for the central incisor) and x axis (palatal plane) expressed the inclination of the tooth