Research Article
Volumetric Analysis of the Jaws in Skeletal Class I and III Patients with Different Facial Divergence Using CBCT Imaging
Table 1
The linear and angular measurements measured on the CBCT-derived cephalometric images
.
| SNA | The sagittal position of the maxilla in relation to the base of the skull | SNB | The sagittal position of the mandible in relation to the base of the skull | ANB | The difference between the above two angles, it represents the sagittal relationship between the jaws | Y-axis | The angle that is formed from the points (N-S-Gn) according to Jarabak | MM angle | The angle between the maxillary and mandibular planes | Md.SN | (S-N : Go-Me) The angle between the mandibular plane and the anterior basal plane | Mx.SN | (S-N : Spp) The angle between the maxillary plane and the anterior basal plane | N-Me | The anterior facial height (mm) | S-Go | The posterior facial height (mm) | N-Go | The facial depth (mm) | Bjork sum | (N-S-Ar) The sella angle between the anterior and posterior basal planes | (S-Ar-Go) The articular angle between the posterior basal plane and the ramus | (Ar-Go-Me) The angular angle between the ramus and the mandibular plane | The sum of Bjork is the sum of the above angles according to Bjork |
|
|
The definitions were based on A. Jacobson and R. L. Jacobson [ 23] and Riolo et al. [ 24]. |