The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1993
Filed:
Jun. 03, 1992
Richard L Feldman, Easton, CT (US);
Other;
Abstract
This disclosure is directed to a dental imaging matrix band and a method for making a dental prosthetic restoration such as a 3/4 crown, full crown, or fixed bridge with the use of a CAD-CAM machine. This is attained by encircling a tooth or teeth prepared for receiving a 3/4 crown, full crown or fixed bridge restoration by a matrix band having an enlarged beaded peripheral edge or lip which can be optically read by a scanner of a CAD-CAM machine. The optical image of the tooth or teeth and the encircling matrix band is transformed by the CAD-CAM machine into a signal which controls the operation of the forming or milling portion of the CAD-CAM machine to shape a block of dental material into the shape of a 3/4 crown, full crown or fixed bridge to be fitted to the prepared tooth or teeth in accordance with the optical image of the prepared tooth or teeth. The matrix band is defined by a strip of thin non-reflective metallic material having a longitudinal edge thereof defining an enlarged bead which can be optically scanned by a CAD-CAM machine; the image of which being transformed into a signal enabling the CAD-CAM to machine a 3/4 crown, full crown or fixed bridge to be received by the prepared tooth or teeth.