The screw creates a continuous force used for gap closure
The open screw is available in different sizes depending on the size of the gap. The retention should be bent again in such a way that it does not invade the later sawing area.
In the area of the gap, the acrylic edges are grinded off parallel so that the screw can be closed without any obstacles.
When the screw is totally closed and a gap remains between the teeth, one can proceed gradually; after a new impression, the plate is changed inserting a new screw in order to close the gap completely.