Other

Ceramco Inc.

Robert M Michael

A dental stone casting mold device (10) for use with a hardenable stone material (21) includes associated first and second side walls (11, 12) first and second end walls (13, 14) and a floor (15), forming an open top cavity (16). Each first and second side walls (11, 12) and first and second end walls (13, 14) extend from the floor (15) in a lateral direction, such that each has a portion (17) proximate to the floor (15) and a portion (18) distal thereto. There is also at least one slot (22) in the floor (15) removably receiving a stone retaining spine (20). In a preferred embodiment, each of first and second side wall (11, 12) carries a plurality of spaced indexing ribs (60). In another embodiment, each distal end 18 of the first and second side walls (11, 12) have integrally associated lateral extensions or webs (80) therefrom. Device (10) may also be provided with indexing bar or articulator attachment structures (101, 110).

Dental casting mold device

A dental model for use with or without articulating devices, wherein the model has a front face and a rear face, at least one dowel pin affixed to the model and having a free end positioned outwardly from the rear face, a recess form nut having a bore which frictionally receives the free end, a support of rigid material having a proximal surface and a distal surface and positioned with the rear face of the model and the proximal surface of the support juxtaposed, the dowel pin with the form nut thereon removably extending through the support to position the free end adjacent the distal surface of the support, at least an outer portion of the form nut being exposed to view from the distal side of the support, and a shoulder on the outer portion of the form nut adapted for contact with a removal tool for removing the form nut from the dowel pin to leave the free end exposed through the distal side of the support whereby the free end becomes readily accessible for contact with an extraction tool for forcing the dowel pin inwardly of the distal surface of the support for removing the dowel pin and the die model from the support.

Pinned dental models and their preparation and use

A dental stone casting mold adapted to a single casting process for the preparation of a positive tooth replica, the mold having opposed side walls, end walls and a floor forming a cavity for containing fluid or set dental stone, a pair of cooperating interlocking mechanisms, one of the mechanisms being carried by the mold floor and the other being adapted for fixation to the dental stone, each mechanism being cooperatively configured with respect to the other such that when they are forced toward a mating position, vector forces are created tending to urge the set dental stone toward the mold floor.

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Westampton, NJ, United States of America

Robert M Michael