pISSN 2234-7518
eISSN 2005-372X

Table. 2.

Definitions of the landmarks in the crown and root for constructing the tooth axis plane

Tooth axis plane Tooth Definition of landmarks

Two points in the crown One point in the root
Mesiodistal angulation Central incisor The most mesial and distal point of the incisor edge The most apical point of the root
Canine The most mesial and distal point of the marginal ridge The most apical point of the root
Second premolar The most mesial and distal point in the line of occlusion Max: The most apical point of the palatal root
First molar Max: The mesiopalatal and distopalatal cusp tips Max: The most apical point of the palatal root
Man: The mesiobuccal and distobuccal cusp tips Man: The most apical point of the distal or distobuccal root
Buccolingual inclination Central incisor The midpoint of the incisor edge and the central pit of lingual surface The most apical point of the root
Canine The cusp tip and cingulum The most apical point of the root
Second premolar The buccal and lingual cusp tips Max: The most apical point of the buccal root
First molar Max: The mesiobuccal and mesiopalatal cusp tips Max: The most apical point of the mesiobuccal root
Man: The mesiobuccal and mesiolingual cusp tips Man: The most apical point of the mesial or mesiobuccal root

Max, Maxilla; Man, mandible.

Korean J Orthod 2020;50:229~237 https://doi.org/10.4041/kjod.2020.50.4.229
© Korean J Orthod