US 11,826,213 B2Granted

Method for producing a guide rail for machining prosthetic teeth

AssigneeKulzer GmbH

InventorsLars Hendrik Diez, Stephan Dekert, Roger Ritzel

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Abstract

A method for producing a guide rail having the steps of: (A) generating or providing a virtual 3D model of a dental prosthesis with at least one virtual model of a machined prosthetic tooth to be arranged in a prosthesis base; (B) calculating a volume to be removed from a prefabricated prosthetic tooth; (C) generating a virtual model of a guide rail which is fixed to a mount for fastening the prefabricated prosthetic tooth such that the guide rail enables guidance of a milling head and/or a cutting tool of known dimensions, in such a manner that the volume to be removed from the prefabricated prosthetic tooth is traversed with the milling head; and (D) producing a physical guide rail on the basis of the virtual model of the guide rail using a CAM method. Also disclosed are an apparatus for implementing the method, a method for basally shortening prosthetic teeth, and a method for producing a dental prosthesis with such a method for producing a guide rail. The invention further relates to a guide rail produced with such a method and to a dental prosthesis produced with such a method for producing a dental prosthesis.

Claims24

Dependent claims

A method for producing a guide rail which is provided for guiding a mobile milling head or cutting tool during the machining of prefabricated prosthetic teeth, wherein the method comprises the following steps:

(A) generating or providing a virtual 3D model of a dental prosthesis with a virtual model of a prosthesis base as a gum imitation and with at least one virtual model of at least one machined prosthetic tooth to be arranged in the prosthesis base to reproduce at least one tooth;
(B) calculating a volume to be removed from at least one prefabricated prosthetic tooth by comparing the at least one virtual model of the at least one machined prosthetic tooth with at least one virtual model of the at least one prefabricated prosthetic tooth using a CAD method;
(C) generating a virtual model of a guide rail using a CAD method, which guide rail is fixed or fixable to a mount for fastening the at least one prefabricated prosthetic tooth, wherein the guide rail is modeled such that (a) the mount is positioned relative to the guide rail and (b) the at least one prefabricated prosthetic tooth is fastened in the mount in an orientation whereby the guide rail enables guidance of at least one milling head and/or at least one cutting tool of known dimensions in such a manner that the volume to be removed from the at least one prefabricated prosthetic tooth is traversed with the at least one milling head and/or the volume to be removed from the at least one prefabricated prosthetic tooth is cut away with the at least one cutting tool;
and
(D) producing a physical guide rail on the basis of the virtual model of the guide rail using a CAM method.

2 more elements

A system for producing a guide rail which is provided for guiding a mobile milling head or cutting tool during the machining of prefabricated prosthetic teeth, the system comprising:

a memory device;
and
a processing device operatively coupled to the memory device, the processing device to:
(A) generate or provide a virtual 3D model of a dental prosthesis with a virtual model of a prosthesis base as a gum imitation and with at least one virtual model of at least one machined prosthetic tooth to be arranged in the prosthesis base to reproduce at least one tooth;
(B) calculate a volume to be removed from at least one prefabricated prosthetic tooth by comparing the at least one virtual model of the at least one machined prosthetic tooth with at least one virtual model of the at least one prefabricated prosthetic tooth using a CAD method;
(C) generate a virtual model of a guide rail using a CAD method, which guide rail is fixed or fixable to a mount for fastening the at least one prefabricated prosthetic tooth, wherein the guide rail is modeled such that (a) the mount is positioned relative to the guide rail and (b) the at least one prefabricated prosthetic tooth is fastened in the mount in an orientation whereby the guide rail enables guidance of at least one milling head and/or at least one cutting tool of known dimensions in such a manner that the volume to be removed from the at least one prefabricated prosthetic tooth is traversed with the at least one milling head and/or the volume to be removed from the at least one prefabricated prosthetic tooth is cut away with the at least one cutting tool;
and
(D) produce a physical guide rail on the basis of the virtual model of the guide rail using a CAM method.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/126,850Filed 18 Dec 2020
Priority: EP 201502343 Jan 2020
Published: US 2021/0205056 A18 Jul 2021
Granted: 28 Nov 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61C 1/082
Machine parts specially adapted for dentistry: positioning or guiding, e.g. of drills
A61C 13/0004
Making bridge-work, inlays, implants or the like: computer-assisted sizing or machining of dental prostheses
A61C 13/0019
Production methods: using three dimensional printing
A61C 13/10
Dental prostheses; Making same: fastening of artificial teeth to denture palates or the like