Method of making dental wax pattern

Details Method of making dental wax pattern Method of making dental wax pattern

1995-06-28

1997-11-11

Hail, III, Joseph J.

Metal founding

Process

Shaping a forming surface

164 35, B22C 702

Patent

active

056853564

ABSTRACT:
A method of making a wax pattern by using a dental gypsum model is provided, which comprises the steps of applying a release agent on said gypsum model, coating on the thus applied surface a coating material which leaves no ash upon incinerated at 700.degree. C., and applying a wax melt on said surface. When the wax melt is applied on the gypsum model, the wax is in no direct contact with the release agent, and it is unlikely that gaps may be formed between the wax pattern and the gypsum model or a pad of the wax pattern may warp; that is, the additional operation so far needed for correcting such warpage can be dispensed with, so making precise casting possible. In addition, the presence of the release agent enables removal of the wax pattern to be done as conventional. Furthermore, when the thus removed wax pattern is invested in a investment material to incinerate the wax pattern, no ash of the above coating material remains in the cavity, so that metal can be cast with no defect.

REFERENCES:
patent: 3747663 (1973-07-01), Taylor
patent: 4745961 (1988-05-01), Salandra

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