Table 1.
Distribution of samples.
Table 2.
Distribution of teeth.
Fig 1.
A detailed procedure for locating the measurement plane.
Three guidelines with different colors representing the correlated planes as follows: blue, axial plane; red, sagittal plane; green, coronal plane. A, Adjust the location of the axial plane by passing the blue guideline through the CEJ of the selected anterior tooth in both the coronal and sagittal views; then, rotate the green guideline until the intersecting line is the shortest. B, Rotate the red guideline until it passes through the root apex and the midpoint of the incisal margin. C, Rotate the green guideline until it passes through the root apex and the midpoint of CEJ line. D, To ensure precise and accurate identification of the anatomic structures, the largest labiolingual section of the anterior tooth displayed in the corrected sagittal view was chosen as the measurement plane.
Fig 2.
(A) Landmarks and reference planes. (1) midpoint of the CEJ line; (2) root apex (RA) point; (3) long axis (LA; a line from points 1 to 2); (4,5,6) intersecting line perpendicular to LA at the 2 mm, 4 mm, 6 mm below the CEJ line; (7) intersecting line perpendicular to LA at RA; (B) Variables: A and B, vertical alveolar bone level (distance from CEJ to alveolar crest parallel to LA); C and D, alveolar bone area (ABA) at 2 mm below the CEJ line; E and F, ABA at 4 mm below the CEJ line; G and H, ABA at 6 mm below the CEJ line; I and J, apical ABA; and K and L, total ABA on the labial (C+E + G + I) and palatal sides (D+F + H + J). Paired variables are the labial and palatal sides.
Table 3.
Comparison of maxillary anterior vertical bone level between high-angle skeletal Class II malocclusion patients and high-angle skeletal Class III malocclusion patients (mm).
Table 4.
Comparison of mandibular anterior vertical bone level between high-angle skeletal Class II malocclusion patients and high-angle skeletal Class III malocclusion patients (mm).
Table 5.
Comparison of maxillary alveolar bone area between skeletal Class II malocclusion patients and skeletal Class III malocclusion patients (mm2).
Table 6.
Comparison of mandibular alveolar bone area between skeletal Class II malocclusion patients and skeletal Class III malocclusion patients (mm2).
Table 7.
Comparison of the thickness of maxillary alveolar bone between skeletal Class II malocclusion patients and skeletal Class III malocclusion patients (mm).
Table 8.
Comparison of the thickness of mandibular alveolar bone between skeletal Class II malocclusion patients and skeletal Class III malocclusion patients (mm).
Fig 3.
Comparison of the alveolar bone thickness of maxillary and mandibular anterior teeth between two groups.
* P<0.05.