Table 1 CBCT parameters used in the study with a brief measurement technique description
PARAMETER | ABB. | DEFINITION | |
|---|---|---|---|
Nasal opening | |||
Anteroposterior diameter | APNO | Anteroposterior diameter of the nasal opening measured on a reference sagittal plane | |
Mediolateral diameter | MLNO | Mediolateral diameter of the nasal opening measured on oblique coronal reformation passing through the longitudinal axis of the nasopalatine canal | |
Oral opening | |||
Anteroposterior diameter | APOO | Anteroposterior diameter of the oral opening measured on sagittal section | |
Mediolateral diameter | MLOO | Mediolateral diameter of the oral opening measured on oblique axial reformation at the APOO level | |
Length | L | The nasopalatine canal length measured between the midpoint of the nasal and oral opening along the longitudinal axis in the reference sagittal plane | |
Minimum width | minML | The minimum mediolateral diameter of the canal measured on oblique coronal reformation passing through the longitudinal axis of the canal | |
Anterior wall expansion | AWE | The maximum distance between the anterior wall of the canal and the line connecting the anterior edges of the nasal and oral opening on the sagittal section | |
Angle | A | The angle between the longitudinal axis of the canal and the nasal floor measured on the sagittal section | |
Mid-level anteroposterior diameter | MidAP | The distance between the anterior and posterior walls at the middle of the canal, perpendicular to the longitudinal axis, measured on the sagittal plane | |