Pin with sleeve for making dental prosthesis

Abstract

In the making of fixed dental prosthesis, a model is employed, which is an accurate replica of the patient's teeth and gums. For reinforcement, the model is fixed to a base. A model comprises a replica of teeth remaining in the patient's mouth and a replica of teeth to be prepared by restorative dentistry. For preparing the teeth by restorative dental techniques, a die is used. It is desired that the die be removed from and replaced in the model with facility, the die be returned to the model in a precise manner, the die be removable from the base on which the model is secured, and the die be prevented from rotating relative to the pin. Toward this end, the pin of the present invention is formed with a tip that is embedded in the extremity of the die facing the model for fixing the die thereto. The tip has a side elevation contour somewhat similar either to a triangular configuration or a rectangular configuration. Extending from the tip is a shank having one portion extending beyond another portion thereof. The longer portion of the shank is received by a bore formed in a rubber sleeve, which is disposed in the base to which the model is fixed. A wall of the sleeve is planar with the wall of the base removed from the model. The shorter portion of the shank at the extremity thereof abuts against the wall of the rubber sleeve confronting the die.

Dependencies are inferred from the claim text.