EP1881802A2 - Verfahren zur herstellung eines zahnersatzteils, zahnersatzteil, bauteil und rohling hierzu - Google Patents

Verfahren zur herstellung eines zahnersatzteils, zahnersatzteil, bauteil und rohling hierzu

Info

Publication number
EP1881802A2
EP1881802A2 EP06755181A EP06755181A EP1881802A2 EP 1881802 A2 EP1881802 A2 EP 1881802A2 EP 06755181 A EP06755181 A EP 06755181A EP 06755181 A EP06755181 A EP 06755181A EP 1881802 A2 EP1881802 A2 EP 1881802A2
Authority
EP
European Patent Office
Prior art keywords
component
dental prosthesis
components
blank
data set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06755181A
Other languages
German (de)
English (en)
French (fr)
Inventor
Joachim Pfeiffer
Wilhelm Schneider
Norbert Thiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sirona Dental Systems GmbH
Vita Zahnfabrik H Rauter GmbH and Co KG
Original Assignee
Sirona Dental Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sirona Dental Systems GmbH filed Critical Sirona Dental Systems GmbH
Publication of EP1881802A2 publication Critical patent/EP1881802A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0004—Computer-assisted sizing or machining of dental prostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A61K6/818—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A61K6/827—Leucite
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth

Definitions

  • the invention relates to a method for producing a tooth replacement part, which is constructed from a first component and from a further component, wherein the further component is optionally fastened to the first component with the interposition of further components.
  • a tooth replacement part which is constructed from a first component and from a further component, wherein the further component is optionally fastened to the first component with the interposition of further components.
  • an at least one-piece framework may be provided, wherein the framework is to be provided with a to be understood as a further component facing.
  • a crown cap should be considered as a single-unit framework, multi-unit frameworks extend over at least two tooth positions.
  • crowns and bridges are produced, in which a scaffold is first produced, which is then veneered to achieve an aesthetically high-quality result.
  • the production of the frameworks is done partly by CAD / CAM procedures, but the veneering is done manually.
  • the veneering is done manually.
  • overpress scaffolds in a manual operation with a veneering compound.
  • the basic idea of the invention is to produce a framework part on the one hand and a matching veneering part on the other hand and then to connect them to the tooth replacement part.
  • a further method for the production of a dental prosthesis part wherein the dental prosthesis part comprises an at least one unitary framework as the first component and wherein the framework has an outer surface which is to be veneered, consists in that the veneering takes place by means of a separately produced veneering part as a further component , which is optionally attached to the framework with the interposition of further components.
  • a separating surface which is formed by the inner surface of the veneer part on the one hand and the outer surface of the framework on the other hand, the course of the parting surface being automatically determined by a CAD program taking into account the required design parameters.
  • Model e.g. a scaffold, which is introduced into the preparation site and measured together with it, for. to construct a facing piece.
  • the veneering part may itself be multipart, i. it is attached to the scaffolding via an intermediate part.
  • the further component has a contact surface for attachment to the outer surface of the first component. This makes it possible to precisely align the other component on the first component.
  • the two components are produced in a CAD / CAM process, so that the 3D data sets of the components and the relationship of these to each other without further measurement are known.
  • the two components consist of different materials, whereby an adaptation to different requirements of the individual components is possible.
  • the material of the veneer is aesthetic and the material of the framework is optimized in terms of strength, in the choice of material. An optimization of the design of the components under these aspects is possible.
  • the bonding material is colored to achieve a desired optical effect.
  • the geometric course of the arrangement of the connecting material can also be designed in particular for the design of color effects.
  • a gap is provided between the inner surface and the outer surface which is filled with the bonding material. In this case, the gap can be designed differently thick.
  • a different coloration of the dental prosthetic item is possible with a colored connecting material.
  • the dimensioning of the gap and the coloring can be part of the CAD process for the construction of the further component.
  • Components provided with a connection surface for attachment to the scaffold and attached to the scaffold.
  • the at least two components are interconnected by means of a connecting material.
  • the at least two components are produced in a CAD / CAM process.
  • the at least two components consist of different materials.
  • the veneering part is aesthetically optimized and that the framework is optimized in terms of strength.
  • the connecting means is colored to obtain a desired optical effect.
  • the component is aesthetically optimized.
  • the material is suitable for bonding with glass solder, low melting ceramic or organic adhesive.
  • the material is suitable for connection by means of a heat treatment.
  • Another object of the invention is a blank for producing a composite of a first and at least one further component dental prosthesis, which is to be worked out by means of material removing machining process from the blank.
  • the blank consists of a first part of a first material for the first component and a second part of a second material for the further component.
  • material for the first component Al 2 O 3 or ZrO and as a material for the second component feldspar ceramic. Both materials are particularly suitable for the respective applications, namely lent for scaffolding on the one hand and for veneering on the other.
  • At least a part of the blank for the production of the dental prosthesis parts of different colors are provided. Together with the colored connection means, a further aesthetic optimization of the final dental prosthetic item can be achieved.
  • the blank may have a holding part and a blank body connected thereto, which forms the first and second part, wherein the first part is arranged on the holding part and the second part on the first part.
  • Fig. 1 shows a dental prosthesis with a frame and a veneer
  • the Fig. 2 shows a detail of Fig. 1 in the region of an inner parting surface
  • Fig. 3 shows another tooth replacement part
  • FIG. 1 shows a complete dental prosthesis part 1 to be produced in the form of a bridge, which is constructed from a first component in the form of a framework 2 and a second component according to the invention in the form of a veneer 3. Between the veneer 3 and the framework 2 there is a separating surface 4 which is formed by the inner surface 5 of the veneer 3 on the one hand and the outer surface 6 of the framework 2 on the other hand.
  • a separating surface 4 which is formed by the inner surface 5 of the veneer 3 on the one hand and the outer surface 6 of the framework 2 on the other hand.
  • Parting surface 4 is preferably determined automatically by a CAD program taking into account the required design parameters.
  • the veneer 3 is made of a material that is translucent and allows underlying layers to show through under the veneer 3.
  • the framework 2 may in turn have an inner surface 7 for attachment to an abutment, not shown, or a dental rest (not shown).
  • the dental prosthesis part 1 can also be more than two parts, for example when an intermediate part 3 'is inserted between the veneering part 3 and the framework.
  • the veneer part can also be divided into individual limbs or groups of adjacent limbs. The construction of the framework and the veneer part will, however, usually be designed so that there is only one direction of retraction, so that only one veneer part is necessary. As a rule, it is harmless if parts of the framework remain free, for example the lower part of the bridge member.
  • a connecting layer is provided with a gap 8 between the inner surface 5 of the facing member 3 and the outer surface 6 of the framework 2, which is filled with a connecting means 9.
  • a projection 10 can be arranged in the gap 8, which rests on the outer surface 6 with a contact surface 11.
  • the adhesive 9 may be colored and have a color intensity and / or a coloration which depends on the thickness of the bonding layer. As the layer thickness increases, the color intensity increases and the bond layer appears darker. As the layer thickness decreases, the color intensity decreases and the tie layer appears brighter.
  • a dental restoration is shown, in which an outer part 33 is placed on an inner part 32.
  • a gap 8 is filled with a connecting means 9, whose Thickness ti in a lower region is greater than the thickness t 2 in an upper region.
  • the outer part Via a spacer 10 on the outer part 33, which engages in a corresponding recess 12 on the inner part 32, the outer part is placed on the inner part and set the predetermined distance.
  • the connecting means 9 can in principle be organic or inorganic.
  • dyed glass solder can be used as the material, for example.
  • FIG. 4 shows a blank for the production of a tooth replacement part consisting of a plurality of components, wherein the blank 40 comprises a holding part 41 for fastening in a processing machine (not shown) and a blank body 42 connected to the holding part 41.
  • the blank body 42 has two adjoining partial regions 43, 44, which have a different material composition, the partial region 43 being arranged between the holding part 41 and the partial region 44.
  • the difference of the material composition can be in the optical Properties, for example, the color or translucency, but in particular in the strength values, so that a component of a multi-part dental prosthesis part of the one material of the portion 43 and another component of the other material of the portion 44 in a single setting without changing the Workpiece can be produced.
  • a relative movement of a tool 45 in the direction of the arrows 46, 47 on the blank body 42 can be carried out.
  • the schematic procedure of the method will be explained below.
  • the starting point are CAD data sets that describe the tooth restoration to be created in the form of a core and a shell.
  • the data set for the scaffold as the first component can be generated by measuring an existing scaffold.
  • the data record can also be generated by a CAD process by constructing a framework on a preparation site or a model thereof as a data record.
  • the dataset for the veneer part as the second component is generated in a CAD process, starting from the dataset for the framework for determining the connection surface to the framework and the dataset of the preparation site for determining the outer contour. It is possible to generate a data set by means of the scaffolding arranged in the preparation site (core part) or to set the scaffold only virtually on the preparation site present as a data record and to generate a data record therefrom.
  • a complete dental prosthetic item can be constructed, ie with the outer contour on the one hand and the connection contour to the preparation. Onsstelle on the other hand, and only then the tooth replacement part is divided into a first and a second component for the core or the frame and the shell or the veneer part. This division can take place automatically.
  • a glass solder or metal solder or another inorganic agent can also be added to the joint gap.
  • All such compounds typically involve a temperature treatment in which the result is temperature-resistant, that is, for example, can be exposed to further heat treatment processes such as glazing. Furthermore, it can also be added with an organic adhesive. This is then cured either chemically or by light.
  • the color and translucency of the joining material can be deliberately chosen to optimize the overall impression of the restoration.
  • the shape of the joint gap can also be used for the purpose of optimizing the aesthetic result. It is also conceivable that a joining material is used, which is discolored by subsequent exposure to light.
  • the process can be assisted by special blanks in which the two materials for the core part and the shell part are placed on a holder, so that both parts can be ground by the machine without further user interaction.
  • a blank is not a mandatory requirement for carrying out the method, which also works with multiple blanks, but at a lower level of automation.
  • a rule according to which the overall picture is divided into scaffolding and veneering can be the scaffolding with the same
  • Al 2 O 3 or ZrO may be used as material for the second part 44

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Dentistry (AREA)
  • Engineering & Computer Science (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Dental Prosthetics (AREA)
  • Dental Preparations (AREA)
  • Prostheses (AREA)
EP06755181A 2005-05-13 2006-05-15 Verfahren zur herstellung eines zahnersatzteils, zahnersatzteil, bauteil und rohling hierzu Withdrawn EP1881802A2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005023106A DE102005023106A1 (de) 2005-05-13 2005-05-13 Verfahren zur Herstellung eines Zahnersatzteils, Zahnersatzteil, Bauteil und Rohling hierzu
US11/206,179 US20060257824A1 (en) 2005-05-13 2005-08-18 Method of producing a dental prosthetic item, and a dental prosthetic item, a component therefor, and a blank therefor
PCT/EP2006/062303 WO2006120255A2 (de) 2005-05-13 2006-05-15 Verfahren zur herstellung eines zahnersatzteils, zahnersatzteil, bauteil und rohling hierzu

Publications (1)

Publication Number Publication Date
EP1881802A2 true EP1881802A2 (de) 2008-01-30

Family

ID=37295481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06755181A Withdrawn EP1881802A2 (de) 2005-05-13 2006-05-15 Verfahren zur herstellung eines zahnersatzteils, zahnersatzteil, bauteil und rohling hierzu

Country Status (6)

Country Link
US (1) US20060257824A1 (zh)
EP (1) EP1881802A2 (zh)
JP (1) JP2008539920A (zh)
CN (1) CN101217918A (zh)
DE (1) DE102005023106A1 (zh)
WO (1) WO2006120255A2 (zh)

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JP2008539920A (ja) 2008-11-20
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DE102005023106A1 (de) 2006-11-16
CN101217918A (zh) 2008-07-09

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