Table 1 Definition of long-axis planes and lines of maxillary posterior teeth
Variable/tooth | Definition |
|---|---|
Long-axis plane of teeth | |
Maxillary premolar plane | Measuring plane passing through the central fossa and furcation (multirooted) or root apex (single-rooted) of the premolar |
Maxillary first molar plane | Measuring plane passing through the central fossa and trifurcation of maxillary first molar |
Long axis of teeth | |
Maxillary premolar | Line passing through the central fossa and furcation (multirooted) or root apex (single-rooted) |
Maxillary first molar | Line passing through the central fossa and furcation |