The pin positions are chosen taking this cast into account. By drilling pin-holes, there is a secure and immovable patient-analogous transfer to the dimensionally stable Giroform® plate.

The pin-holes ensure that the positional information is now stored. The Giroform® base plate serves as a kind of memory stick.

The cast plaster tooth arc is removed from the base plate after 30 minutes - ie. before the onset of plaster expansion.

This allows the tooth arc to expand freely. However after this, it no longer matches the drilled original information on the Giroform® base plate.

After sawing or separating the tooth arc, the pins again fit into the drill-holes.

The cut section serves as an expansion joint to accommodate the expansion, which is now restricted to just the individual segments, thus no longer causing distortion of the tooth arc.

The segmented model therefore offers a precision basis for perfectly-fitting work.