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The primary conical crowns are milled with exception of the premolar.
Then hold a wax-scraper 0° next to the canine conus from the mesial side ...
...and turn the model mesially in an angle of 4° - 5°.
In this way, the premolar 25 is set upright and also milled with a 6° angle.
The disadvantages of milling the 6° angle is the undercut present in the marginal area of the canine, which may later result in a visible metal margin.
That’s why the decision was to work in this case with 2° tools though the metal margin of the premolar in the distal non-visible area would be higher.
Primary conical crowns are exclusively milled without a shoulder. A shoulder milling would prevent the wedge effect in an early contact with the secondary crown in the shoulder area.
Wax-milling of the primary conical crowns with a 2° angle.
The milled wax crowns made of StarWax M are then invested and cast in remanium® star.
DENTAURUM DIGITAL