One-piece cast

Preparing the model for dupication

Milled primary crowns on top of the model.

Prepared model for silicone duplication.

Thickness of the base minimum 15 mm.

As described in chapter 5, the base-thickness of the refractory model should be a minimum of 15 mm for a sufficient expansion in the area of the transversal connector, which is a precondition for a gap-free fit of the latter after the cast.

Preparing the model in the margin area of the telescopic crowns. A wax-wire of diameter 0.8 mm applied in the transition zone between crown and retention ensures a free space for the adjacent gingiva.