Patent
1975-06-02
1976-10-26
Peshock, Robert
A61C 1300
Patent
active
039875458
ABSTRACT:
A method and apparatus are disclosed for forming a dental prosthesis in s in a patient's mouth for the restoration of one or more missing, worn or broken teeth. The method includes forming a positive model of the patient's mouth and correcting the model by filling in the areas where restoration is required to correspond with the desired size and shape of the restored teeth, forming an elastomeric mold half of the areas to be restored using the model as a pattern, preparing the patient's teeth to receive the prosthesis by cutting down selected teeth, applying the elastomeric mold over the area of the patient's teeth and jaw where restoration is required so that a mold cavity is formed between the inner mold surface and the patient's jaw, pumping a vacuum in the mold cavity to test the seal of the elastomeric mold half relative to the jaw, releasing the vacuum if the seal holds, preparing a self-curing liquid resin molding material in a receptacle which is open to the atmosphere, connecting the mold cavity with the liquid resin in the receptacle through a flexible tube, closing the tube, drawing a vacuum in the mold cavity, opening the tube whereupon atmospheric pressure acting on the surface of the liquid in the receptacle forces the liquid resin into said mold cavity through the flexible tube, allowing the liquid resin to cure, and removing the mold from the patient's mouth.
The apparatus includes the elastomeric mold half prepared according to the above described method, a hand operated vacuum pump, a flexible exhaust tube connected between the vacuum pump and the elastomeric mold half, a flexible inlet tube connected between the elastomeric mold half and an open receptacle for containing a mix of cold curing liquid resin, and a clamp for closing and opening said inlet tube.
REFERENCES:
patent: 3421222 (1969-01-01), Newman
patent: 3808687 (1974-05-01), Millet
IPCO Hospital Supply Corporation (Whaledent International Divisi
Peshock Robert
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