From: Evaluation of the stiffness characteristics of rapid palatal expander screws
1. Measurement | Kind of measure | Mean value |
---|---|---|
| Length of posterior arms (including screw body) | 41.3 mm |
| Length of anterior arms (including screw body) | 32.5 mm |
| Angle between screw body and posterior arms | 146.2° |
| Angle between screw body and anterior arms | 144° |
| Distance between anterior and posterior arms | 19.8 mm |