Dental prosthesis production device and dental prosthesis

Abstract

The invention relates to a dental prosthesis production device in which the dental prosthesis has an implant ( 40 ) and an abutment ( 10 ) which has a shape that is compatible with the implant ( 40 ) and on or to which abutment a dental structure ( 28 ) that is made of a dental material, in particular ceramic and/or plastic, and produced with the aid of a CAM process using rapid prototyping or compression molding technology can be secured. The abutment is mounted on the implant ( 40 ) via a releasable connection, in particular a screw connection ( 44 ), having an anti-rotation mechanism ( 50 ), and an anti-rotation device (groove 22 ) is formed between the abutment ( 10 ) and the dental structure ( 28 ). A selection device ( 66 ) is provided for abutments, said selection device allowing a selection of the abutment ( 10 ) for producing the dental prosthesis, optionally after reducing the abutment height to a specified value in a patient-specific manner, and a machining tool, in particular a milling cutter, or a CAM device is provided for shortening the abutment ( 10 ).

1 . A dental prosthesis production device, comprising:
 an implant ( 40 ) and   an abutment ( 10 ) which has a shape that is compatible with the implant ( 40 ) onto which abutment a dental structure ( 28 ) which is produced by means of a CAM process, using rapid prototyping or compression molding technology and which is made of a dental material, can be attached,   wherein the abutment is mounted on the implant ( 40 ) via a releasable connection, having an anti-rotation mechanism ( 50 ), and an anti-rotation device (groove  22 ) being configured between the abutment ( 10 ) and the dental structure ( 28 ),   characterized in that the anti-rotation device forms at least one flute (groove  22 ) at a cylindrical or conical area of the abutment ( 10 ) ( 4 ,  14 ,  22 ) which flute extends across at least a part of the height of this area, the flute ending at an end radius or at an end slant of the abutment ( 10 ) ( 5 ,  15 ,  21 ) which flute(s) is/are maintained true to shape even if the area is shortened, and that a selection device ( 66 ) is provided for abutments, said selection device allowing a selection of the abutment ( 10 ) for producing the dental prosthesis, optionally after reducing the abutment height to a specified value in a patient-specific manner, and a machining tool, or a CAM device is provided for shortening the abutment ( 10 ).   
     
     
         2 . The dental prosthesis production device as claimed in  claim 1 , characterized in that by means of the selection device ( 66 ) a predefined number of heights of the tubing section ( 18 ) of the abutment ( 10 ), can be accessed and the height suitable for the dental structure ( 28 ) can be selected. 
     
     
         3 . The dental prosthesis production device as claimed in  claim 1 , characterized in that by means of the selection device ( 66 ) for the dental prosthesis an abutment ( 10 ) can be selected which matches the implant ( 40 ) and the dental structure ( 28 ) with regard to the diameter and the type, and which abutment is of the same height as or larger than a standardized height with regard to the height, and in that by means of the selection device ( 66 ) shape data can be supplied to a CAM device which relate to a patient-specific height of the selected abutment ( 10 ). 
     
     
         4 . The dental prosthesis production device as claimed in  claim 1 , characterized in that the optionally provided reduction in height of the abutment ( 10 ) can be performed to provide two to five, standardized lengths such that the abutment ( 10 ) is provided comprising the unchanged maximum height, one or more medium heights or a minimum height after the standardized reduction in height. 
     
     
         5 . The dental prosthesis production device as claimed in  claim 1 , characterized in that the production device comprises a CAM device for finishing a dental structure ( 28 ) which calculates the data of the dental structure ( 28 ) to be produced based on the data of its outer geometry and on the data of the adjusted abutment ( 10 ) and forwards the data to the CAM device. 
     
     
         6 . The dental prosthesis production device as claimed in  claim 4 , characterized in that a desired shape of the dental prosthesis can be determined based on an extraoral or intraoral 3D scan with the aid of a scanbody having cylindrical geometry comprising a bevel or a ball-shaped reference surface by supplying the scanning result to a CAM device which, based on the shape of neighboring teeth of the desired dental prosthesis, forms a virtual shape of the restorations to be produced and which divides them virtually into an implant ( 40 ), an abutment ( 10 ) and a dental structure ( 28 ). 
     
     
         7 . The dental prosthesis production device as claimed in  claim 1 , characterized in that by means of the selection device ( 66 ) at least one abutment ( 10 ) of a dental prosthesis can be selected, which comprises a crown or a bridge as a supraconstruction, depending on the desired constructive height level thereof in relation to an occlusal plane, and the degree of the required shortening of the abutment ( 10 ) can be returned to predefined standardized heights in order to provide the desired height level of the supraconstruction, and the shape data predefined in this way can be supplied to the CAM device. 
     
     
         8 . The dental prosthesis production device as claimed in  claim 1 , characterized in that the abutment ( 10 ) for providing the dental prosthesis comprises a conical or cylindrical area which carries at least one flute which extends across at least a part of the height of the conical or cylindrical area. 
     
     
         9 . A dental prosthesis, comprising:
 an implant ( 40 ) and   an abutment ( 10 ) which abutment has a shape that is compatible with the implant on or to which abutment a dental structure ( 28 ) which is produced by means of CAM, using rapid prototyping or compression molding technology and which is made of a dental material can be attached,   wherein the abutment being mounted on the implant ( 40 ) via a releasable connection, which releasable connection comprises an anti-rotation mechanism ( 50 ), and an anti-rotation device being configured between the abutment ( 10 ) and the dental structure ( 28 ),   characterized in that the anti-rotation device comprises at least one flute (groove  22 ) at a cylindrical or conical area of the abutment ( 10 ) ( 4 ,  14 ,  22 ), which flute extends across at least a part of the height of the cylindrical or conical area, the flute ending at an end radius or at an end slant of the abutment ( 10 ) ( 5 ,  15 ,  21 ) which abutment can be maintained true to shape even if the area is shortened.   
     
     
         10 . The dental prosthesis as claimed in  claim 9 , characterized in that the area of the abutment ( 10 ) is configured cylindrically and in that the at least one flute (groove  22 ) extends from the end slant or the end radius of the abutment ( 10 ), in a case of an unabridged area, across at least 70%, of the height of this area. 
     
     
         11 . The dental prosthesis as claimed in  claim 10 , characterized in that the flute (groove  22 ) or flutes taper towards a collar ( 14 ) of the abutment ( 10 ) with a slant or a collar radius or end in front of the radius or the slant of the collar ( 14 ) of the abutment ( 10 ) ( 10 ,  20 ,  30 ). 
     
     
         12 . The dental prosthesis as claimed  claim 11 , characterized in that the dental prosthesis comprises two or more abutments ( 10 ) with differently shortened cylinder areas (tubing sections  18 ), wherein every abutment ( 10 ) can be additionally shortened to the desired length in a true-to-shape manner by means of one or more profile cutters or by means of a CAM device. 
     
     
         13 . The dental prosthesis as claimed in  claim 12 , characterized in that the abutment ( 10 ), after the shortening, is compressed on the surface, by being exposed to a jet of a granular substance and/or that the abutment ( 10 ) consists of a ceramic or plastic or metal material. 
     
     
         14 . The dental prosthesis as claimed in one of the  claim 13 , characterized in that the abutment ( 10 ) comprises a single-colored to two-colored coating, comprising TiN or an anodization for the production of an aesthetic abutment surface, in brighter shades which are similar to the tooth color and/or that the abutment ( 10 ) comprises a roughened surface. 
     
     
         15 . The dental prosthesis as claimed in one of the  claim 14 , characterized in that the flute (groove  22 ) extends at the cylinder section (tubing sections  18 ) in the manner of a bent circular arc towards the outside and comprises an end radius or an end slant at the cylinder section (tubing sections  18 ), and in that the flute (groove  22 ) ends in front of the radius or the slant of the collar ( 14 ) of the abutment ( 10 ) with a slant which is rounded off towards the collar ( 14 ), and in that the collar comprises at least one rounding at the cylinder section (tubing sections  18 ) and/or at an implant connection ( 12 ) of the abutment ( 10 ). 
     
     
         16 . The dental prosthesis production device as claimed in  claim 1 , wherein the dental material comprises one or more of ceramic and plastic,
 wherein the releasable connection comprises a screw connection ( 44 ), and   wherein the machining tool comprises a milling cutter.   
     
     
         17 . The dental prosthesis production device as claimed in  claim 2 , wherein the predefined number of heights comprise three heights of large, medium and small. 
     
     
         18 . The dental prosthesis production device as claimed in  claim 4 , wherein the standardized lengths comprise two to three lengths. 
     
     
         19 . The dental prosthesis production device as claimed in  claim 6 , wherein the virtual shapes of the restorations are divided into an implant ( 40 ), an abutment ( 10 ) and a dental structure ( 28 ) after user intervention. 
     
     
         20 . The dental prosthesis as claimed in  claim 10 , wherein the at least one flute (groove  22 ) extends from the end slant or the end radius of the abutment ( 10 ) at least 80%, of the height of the unabridged area. 
     
     
         21 . The dental prosthesis as claimed in  claim 13 , wherein the comprises titanium or a titanium alloy.