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Deutsche Version

Patrix Preparation
 
1. When determining the direction of insertion, align the master model at a right angle to the ridge of the jaw.
 
2. Model the crown as usual in wax. Set the patrix (POM or wax) in close proximity to the stump by use of a parallel mandrell, secure it to the base of the crown and include it into the crown moulding. The insertion surface results from the shape of the patrix (no milling required).
 
3. Invest the crown moulding with in-worked primary element and cast as usual. Ensure that insertion surface, milling and ball are absolutely free of wax residues. Prepare as usual, no work on primary element required.
 
4. Prepare the crown for ceramic firing as usual. Full facings can be implemented, except for the parallel border surface of the patrix. After facing, initially polish the primary element with a silver wire brush and then high gloss polish with polishing paste and a soft brush.
Caution: Do not remove any material from the ball (polishing without loss of material)!