Dental impression tray for forming a dental prosthesis in situ
AssigneeIPCO Corporation
InventorBernard Weissman
Life of this patent
Estimating the term…
Abstract
A dental impression tray for forming a negative impression of a dental area to be restored. Application devices on the tray permit injection of dental restorative material into a mold cavity defined between the negative impression formed in the tray and the dental area after preparation thereof for restoration. In this manner, a dental prosthesis can be formed in situ utilizing the dental impression tray itself as part of the mold forming device. In a modified form, the tray can be separated into two half sections, whereby in further embodiments thereof, the half sections can be joined together and are interchangeable with half sections of different sizes.
Claims21
A dental impression tray for forming therein a negative impression of a dental area, said tray comprising:
- a trough for receiving dental impression material therein;
- means on said tray for application of dental restorative material into a mold cavity defined between the negative impression, formed in said trough of said tray, and the dental area after preparation thereof for restoration, so as to form a dental prosthesis, said application means including openings provided in said tray;
- valve means insertable in said openings for positioning adjacent to the dental area;
- control means for closing said valve means during formation of the negative impression and for opening said valve means for application of the dental restorative material therethrough;
- said tray including a base wall and upstanding side walls extending outwardly from one side of said base wall to define said trough, a retaining channel provided along at least one of said side walls, at least one elongated slot provided in said one side wall within said channel;
- and
- a strap member adjustably slidable in said channel to abut said one side wall, and at least one transverse opening provided through said strap member for alignment with said slot, said transverse opening receiving said valve means and positioning it within said slot.
A method for forming a dental prosthesis in situ, comprising:
- (a) forming a negative impression in a dental impression tray of a dental area to be restored, and removing the dental impression tray thereafter;
- (b) performing tooth preparatory work in the dental area to be restored, including removal of portions thereof;
- (c) repositioning the dental impression tray having the negative impression therein onto the dental area so as to form a mold cavity between the negative impression in the tray and the prepared dental area;
- (d) injecting dental restorative material into the mold cavity thus formed so as to form the dental prosthesis, and
- (e) removing the dental impression tray leaving the dental prosthesis in the mouth.
Dependencies are inferred from the claim text.