Chairside Advancement Procedure

Once the Twin Block has been worn sufficiently to achieve the initial degree of overjet reduction, additional advancement can be made at subsequent visits, by simply removing the advancement screws, and inserting spacers between the screw heads and the block faces.

Advancement as much as 6mm can be achieved by using the standard 12mm advancement screws. For greater advancements, the longer 16mm or 20mm screws are recommended.

In this way, a gradual reduction of the overjet can be achieved, and a degree of overcorrection obtained if required.

The degree of each subsequent advancement can be individualised for each patient with mandibular dental asymmetry. It is possible to advance one side more than the other to obtain centreline correction.

Simple, quick, chairside advancement.