Plastic and nonmetallic article shaping or treating: processes – Dental shaping type
Reexamination Certificate
2000-05-18
2001-05-29
Fiorilla, Christopher A. (Department: 1731)
Plastic and nonmetallic article shaping or treating: processes
Dental shaping type
C156S182000, C156S283000, C156S325000, C264S018000
Reexamination Certificate
active
06238601
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method for making artificial dental bridges accurate to shape in high strength ceramic material with powder metallurgical methods as well as by joining of two or more ceramic parts to each other.
BACKGROUND OF THE INVENTION
U.S. Pat. No. 5,342,201 discloses a method of manufacturing artificial tooth restorations to natural teeth or implants consisting of a ceramic densely sintered high strength core veneered with dental porcelain by powder metallurgical methods.
OBJECT AND SUMMARY OF THE INVENTION
The object of the present invention is to achieve a rational manufacturing technique for dental bridges in densely sintered high strength ceramic material using modern powder metallurgical technique, registering technique and joining technique. Dental bridges in e.g. densely sintered high strength alumina offer a combination of mechanical strength, biocompatibility and esthetics which is generally not possible with established dental materials and methods intended for dental bridges.
The present invention relates to a method of manufacturing artificial dental bridges in densely sintered ceramic material by joining two or more densely sintered ceramic parts with the aid of glass or sintering technique. The individual parts, whose inner surface which should fit against one or more prepared tooth surfaces or artificial abutments, are made by forming a ceramic powder mixture against a surface of a body whereby said surface is made using a three-dimensional optical or mechanical reading method in which the surfaces of the prepared teeth or artificial abutments and their mutual relationship are registered, either directly in the mouth or on a model in e.g. plaster whereafter the registered surfaces are reproduced in an enlarged format e.g. with the aid of a computer controlled milling machine whereby the magnification is calculated considering the shrinkage of the ceramic material during sintering to full density with addition of desired gap required for cement according to U.S. Pat. No. 5,342,201 and U.S. Pat. No. 5,080,589.
REFERENCES:
patent: 4265669 (1981-05-01), Starling et al.
patent: 4634561 (1987-01-01), Deluca
patent: 4744757 (1988-05-01), Adair et al.
patent: 5080589 (1992-01-01), Od én et al.
patent: 5342201 (1994-08-01), Od én
patent: 5447967 (1995-09-01), Tyszblat
Oden Agneta
Salomonson Jonas
Burns Doane Swecker & Mathis L.L.P.
Fiorilla Christopher A.
Sandvik AB
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