Method of producing a dental ceramic structure

• US 20050146064A1
• Filed: 12/17/2004
• Published: 07/07/2005
• Est. Priority Date: 12/17/2003
• Status: Active Grant

• Current Assignee: Degudent GmbH
• Original Assignee: Degudent GmbH
• Inventors: Volkl, Lothar, Fecher, Stefan
• Granted Patent: US 8,685,294 B2
• Time in Patent Office: Days
• US Class Current: 264/19
• CPC Class Codes: A61C 13/0003 Making bridge-work, inlays, implants or the like
• CPC Class Codes: A61C 13/0004 Computer-assisted sizing or machining of dental prostheses
• CPC Class Codes: A61C 13/20 Methods or devices for soldering, casting, moulding or melting A61C13/04, A61C13/081 take precedence
• CPC Class Codes: A61C 5/77 Methods or devices for making crowns

Abstract

Method of producing a dental ceramic structure by digitizing a model or partial model of the prosthesis to be produced and generating a CAD data set, cutting each section of the muffle based on the CAD data set to form the cavity, pressing the ceramic into the cavity by way of at least one sprue, removing the hardened ceramic from the cavity with the sprue or flash and removing the sprue or flash based on the CAD data set.

Claims

1. A method of producing a dental ceramic structure, in particular, for pressing against, over or around a supporting structure made of metal or ceramic, using a muffle having two sections which define a cavity corresponding to the negative shape of the structure, flowable material being supplied into the cavity via at least one sprue,

characterized by

the method steps of:

a) digitizing a model or partial model of the dental prosthesis to be produced and generating a CAD data set of the dental prosthesis to be produced,

b) cutting each section of the muffle based on the CAD data set to form the cavity,

c) pressing the ceramic, as the material to be supplied, into the cavity by way of the at least one sprue,

d) after hardening the ceramic, removing the structure from the cavity with the sprue or flash thereof extending from the structure, and

e) removing the sprue or flash on the basis of the CAD data set of the structure to be produced.

2. The method according to claim 1,

wherein the dental ceramic structure comprises a supporting structure,

characterized in that

after the cavity has been formed (method step b), the structure is placed in It, the ceramic is then pressed into the cavity over the structure and method steps d) and e) are finally effected.

3. The method according to claim 1,

characterized in that

the mold cavity is surrounded by a hardened embedding substance material.

4. The method according to claim 1,

characterized in that

the sections of the muffle defining the mold cavity are cut by milling or grinding.

5. The method according to claim 1,

characterized in that

a plurality of sprues opening in the mold cavity are formed for the ceramic to be injected.