Cephalometric measurement | Abbreviation | Definition | |
---|---|---|---|
1 | Mandibular plane angle (°) (Steiner) | MP | Angular measurement. Angle formed by the intersection of Mandibular plane (Go-Gn) and SN. Norm 32° ± 4° |
2 | Overbite (mm) | OB | Linear measurement. Distance in millimeters between upper and lower incisal edges perpendicular to the occlusal plane. Norm 2 mm |
3 | Lower incisor inclination (°) (Tweed) | IMPA | Angular measurement. Angle formed by the intersection of lower incisor (L1) and mandibular plane (Me-Go). Norm 90° ± 2.5° |
4 | Upper incisor inclination (°) (Burstone) | U1-PP | Angular measurement. Angle formed by the intersection of upper incisor (U1) and palatine plane (ANS-PNS). Norm 112°–117° |
5 | Upper Incisor Length (mm) | U1L | Linear measurement. Distance in millimeters between the upper incisor incisal edge and root apex. No norm |
6 | Upper incisor position 1 (mm) | CR-SN | Linear measurement. Perpendicular distance in millimeters between the upper incisor center of resistance and SN. No norm |
7 | Upper incisor position 2 (mm) | IE-SN | Linear measurement. Perpendicular distance in millimeters between the upper incisal edge and SN. No norm |
8 | Interincisal angle (°) | U1-L1 | Angular measurement. Angle formed by the intersection of upper incisor (U1) and lower incisor (L1). Norm 130° |