Tray for preparing a dentiform model used for an operation on a dental technic

Claim 1

A tray for preparing a dental model, the tray comprising a single, integral flat body, an arcuate channel formed in a flat surface of the body and simulating the curvature of a row of teeth, the channel having side walls which are outwardly tapered in the direction of said surface, substantially vertical grooves of arcuate cross section formed at regularly spaced intervals along the entire extent of each of the side walls, the arcuate channel also having a base and open ends and, formed in the base contiguous with each of the open ends of the channel, a respective wedge shaped notch for assisting removal by means of a driver blade of a hard body cast in the channel, the open ends of the channel being adapted to be closed by adhesive tape and the notches being adapted to be filled with a soft substance prior to the filling of the channel with a material which will set to form said hard body.