Figure 2From: Evaluation of mechanical properties of three different screws for rapid maxillary expansionDemonstrative resin model. This model reproducing the maxillary dental arch. A pin presenting with a vertical stop at 3.5 mm from the palatal vault was embedded in the resin in the middle of the palate to standardize the position of the screw body (A) and of the bends of the screw arms at the level of first premolars and first molars (B).Back to article page