| Abbreviation | Measurements |
| W | Mandibular ramus width (anteroposterior) |
| D | Distance from mandibular anterior border to mandibular foramen |
| R | Height of mandibular ramus |
| V | Distance from mandibular notch to mandibular foramen |
| W/D | Ratio determined by mandibular width |
| R/V | Ratio determined by mandibular height |
| a | Deepest point of anterior mandibular border |
| s | Lowest point of mandibular notch |