Table 1 Definitions of the included measurements in the study
Measurement | Definition |
|---|---|
MMP | The three-dimensional (3D) angle between the palatal line and the mandibular plane; maxillary-mandibular plane angle. |
MP/SN | The 3D angle between the line S-N and the mandibular plane |
Y axis angle | The 3D angle between y-axis and Frankfurt horizontal plane |
Facial height ratio | The ratio of lower to total facial height |
Lower facial height | The distance between the anterior nasal spine (ANS) and the Menton (Me) |
SNA | The angle between the points S, N, and A |
Effective maxillary length | The linear distance between the Condylion and A points |
SNB | The angle between the points S, N, and B |
effective mandibular length | The linear distance between the Condylion and the Gnathion points |
The angle between three landmarks: A, N, and B | |
SN/occlusal plane | The angle between the line passing from sella turcica to nasion and the occlusal plane |
U1 AP position | The horizontal distance between the incisal edges of the upper central incisors and the frontal plane, as viewed from the sagittal view. |
U1 vertical position | The linear distance from the midroot of the upper incisors to the FHP, as viewed from the sagittal view |
U1 inclination | The angle formed between the frontal plane and the upper right and left central incisor long axes, as viewed from sagittal view |
U6 AP position | The linear distance between the mesio-buccal cusp tip of UR6 and the vertical plane, as viewed from the sagittal view. |
U6 vertical position | The linear distance between the furcation area of the upper right first molar to the FHP, as viewed from the sagittal view. |
L1 inclination | The angle formed between the frontal plane and the lower incisors long axes, as viewed from the sagittal view |
L1 AP position | The horizontal distance between the incisal edges of the lower incisors and the frontal plane, as viewed from the sagittal view. |
L1 to NB line | The horizontal distance between the incisal edges of the lower incisors and the NB line, as viewed from the sagittal view |
L1 vertical position | The linear distance from the midroot of the lower incisors to the mandibular plane, as viewed from the sagittal view |
L6 vertical position | The linear distance from the furcation points of the lower right first molar to the mandibular plane, as viewed from the sagittal view |
L6 AP position | The linear distance between the mesio-buccal cusp tip of lower left first molar and the vertical plane, as viewed from the sagittal view. |