Cephalometric Angular Measurements of the Mandible Using Three-Dimensional Computed Tomography Scans in Koreans

Kim, Yong Hyun; Kang, Seok Joo; Sun, Hook

Abstract

BACKGROUND
We conducted this study to analyze the values of the key cephalometric angular measurements of the mandible using 3-dimensional (3D) computed tomography scans.
METHODS
In the 106 enrolled patients, a 3D cephalometric analysis was performed to measure the angular variables of the mandible. These values were compared between the two sides and between the two sexes.
RESULTS
The frontal measurements revealed that the mandibular body curve angle was larger on the left (Lt) side (right [Rt], 141.24+/-7.54; Lt, 142.68+/-6.94; P=0.002) and the gonial angle was larger on the right side (Rt, 134.37+/-8.44; Lt, 131.54+/-7.14; P<0.001). The sagittal measurements showed that the gonial angle was larger on the right side (Rt, 134.37+/-8.44; Lt, 131.54+/-7.14; P>0.05). Further, the transverse measurements revealed that the mandibular body curve angle was larger on the right side (Rt, 140.28+/-7.05; Lt, 137.56+/-6.23; P<0.001).
CONCLUSIONS
These results provide an average of the mandibular angular measurements for the Korean population, establishing a standard for determining surgical patient groups and outcome evaluations in the field of mandible contour surgery.