Table 1.
Radiographic reference points
| Plan | measurement | definition |
|---|---|---|
| sagittal | Po’Rt.-DRt./Po’Lt.-DLt | Distance between Po’&D |
| sagittal | FRt.-CoRt./FLt.-CoLt | Distance between F&Co |
| sagittal | AmRt.-LRt./AmLt.-LLt | Distance between Am&L |
| sagittal | Po’Rt.-AmRt./Po’Lt.-AmLt | Distance between Po’&Am |
| sagittal | Sagittal condylar angle Rt./Lt | Distance between Co-Lline&Po’-Amline |
| sagittal | Axial axis between left and right condyle | Distance between MDP-DDP and sagittal reference plane |
| sagittal | Intercondylar dystance | Distance between left and right condyle |
| sagittal | Coronal axis between left and right condyle | Axis between CoN-Co and HRP |
| Horizontal Reference Plan | The plane constructed by PoRt. - OrRt. - PoLt (Frankfort plane) | |
|
Sagittal Reference
Plane (SRP) |
The plane perpendicular to FH plane & passing through Na – Ba line (Midsagittal plane) | |
|
Coronal Reference
Plane (CRP) |
The plane perpendicular to FH plane and Midsagittal plane passing through Na (Na - perpendicular plane) |