WO2003057067A1 - Method for producing a dental prosthesis - Google Patents

Method for producing a dental prosthesis Download PDF

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Publication number
WO2003057067A1
WO2003057067A1 PCT/CH2003/000009 CH0300009W WO03057067A1 WO 2003057067 A1 WO2003057067 A1 WO 2003057067A1 CH 0300009 W CH0300009 W CH 0300009W WO 03057067 A1 WO03057067 A1 WO 03057067A1
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WO
Grant status
Application
Patent type
Prior art keywords
characterized
digitized
surface
method according
processing
Prior art date
Application number
PCT/CH2003/000009
Other languages
German (de)
French (fr)
Inventor
Arnold Wohlwend
Daniel Gubler
Original Assignee
Arnold Wohlwend
Daniel Gubler
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

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00Filling or capping teeth
    • A61C5/70Tooth crowns; Making thereof
    • A61C5/77Methods or devices for making crowns
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/0003Making bridge-work, inlays, implants or the like
    • A61C13/0004Computer-assisted sizing or machining of dental prostheses

Abstract

The invention relates to a method for producing a dental prosthesis using a computer-controlled device, according to which a first surface, which is digitized from the perspective of the Z-axis, of the relevant dentition shape forms the basis for the first digitized surface of the modeled dentition shape and, from the perspective of the Z-axis, a second digitized surface of the modeled dentition shape forms the basis for the second machining side.

Description

A process for producing a dental prosthesis

technical field

The present invention relates to a method for manufacturing a dental prosthesis according to the preamble of claims 1 and 4. FIG.

State of the art

Caps, crowns, bridges and partially machining holding webs are modeled in wax, or other materials based on or directly on a model of a dentition impression. The modeled form is digitized by a mechanical scanner, laser or other measuring systems and transferred to the machining program CAM / CNC / NC for processing.

but this belongs to the prior art method has its implementation, considerable drawbacks which are still to come in detail below for illustrative purposes. In particular, but be emphasized that comes with the now well-known method to error accumulation, which is extremely detrimental to the necessary quality assurance in such products. Basically a replicability is in question, which inevitably makes necessary subsequent targeted and costly corrections. Summary of the Invention

The invention aims to provide a remedy. The invention, as characterized in the claims, has for its object to provide an error-free replicability in a method of the type mentioned. The model of a dentition impression is aligned under the measurement unit so that the measurement axis Z corresponds to the direction of insertion-producing unit in the patient's mouth, so to accomplish the safe and accurate manufacture of a unique piece with a generally applicable method.

The main advantages of the invention can be seen in the fact that

a) compared to the general prior art, the preparation limits, which must be very accurate, are measured directly, and thus experience no error accumulation via the intermediate step of the wax model;

b) compared to the general prior art, the preparation limits, which must be very accurate, are measured directly. This eliminates the time-consuming modeling tailored to the Präpärationsgrenzen the tooth stump;

c) as intermediate elements commercially available prefabricated parts, for example Wax parts may be used. This can also be modified and adapted or even modeled and so let all the design options for extreme cases the simplest way to;

d) the process allows for easy inclusion of the counter bite by this is done by creating the Modellationseinheiten in the articulator;

e) the intermediate webs are not bound in shape, wherein the intermediate webs are usually in a round, oval, etc., in the form of CAD designs specified. DA through can, in the simplest way to model the optimum adjustments in terms of strength and aesthetics of any construction;

e) can be dispensed with for many applications on a CAD program. This price shall be reduced for a production- or surveying / construction unit and eliminates the costly incorporation into CAD programs. The dental technician can work with the known his ways of working.

Advantageous and expedient further developments of the inventive feed solution are presented in the other claims.

In the following reference to the drawings, embodiments of the invention will be explained in more detail. All non-essential for the immediate understanding of the invention have been omitted. Identical elements are provided in the various figures with the same reference numerals.

Brief Description of Drawings

It shows:

Figure 1 shows a model of a dentition impression.

Figure 2 is a modeling of parts on the existing dentition model.

. Fig. 3 is a model according to FIG 2 with introduction of Bearbeitungshalteste- gene;

Fig. 4 caps and crowns in special machining allowances;

5 shows a first processing surface in the Z direction. Fig. 6 shows a second processing surface;

Fig. 7, the first face milling addition and the second surface and

Fig. 8 shows a finished θgliedrige bridge.

WAYS OF IMPLEMENTING THE INVENTION, INDUSTRIAL APPLICABILITY

Basically, the model of a dentition impression is first aligned under the measuring unit so that the measurement axis Z corresponds to the unit to be produced, the direction of insertion in the patient's mouth.

As is apparent from Fig. 1 with respect to a first processing side, a model of a dentition impression with its existing ground-down teeth or A- butments and gums bed 1 forming the starting position. Alternatively, gums can be built 4 (eg in the intermediate range, or increased locally with paints of the cement gap, for example. The surface course, the denture impression can therefore be adapted to a versatile manner to the requirements. Thereafter, using a mechanical scanner, laser or other systems of the optics of the Z-axis, the relevant portion of the dentition, digitized. the point clouds or surfaces thus obtained are used as a processing base for the first processing side of the molded. the point clouds or areas obtained can still be computationally designed or supplemented, if necessary, taking into account the margin line 3 and of the ground tooth 2 or abutments.

. From Figures 2, 3 and 4, a second processing site shows being shown here, as modeled by means of wax or other materials as needed one or more of the following parts and fitted one on the existing dentition model and placed: - intermediate members 5 (see Fig. 2)

- bridging webs 6 (see Fig. 2)

- editing support webs 7 (see Fig. 3)

- caps and crowns when special oversizes of distress (see Fig. 4)

- Attachment (not shown in detail)

The relevant portion of the dentition so changed constructed model is digitized in the same clamped again by means of mechanical pick-up, laser, or other measuring systems of the optics of the Z-axis. The point clouds or surfaces from the new surface of the denture impression thus obtained serve as a basis for processing the second processing side of the mold to be produced. When creating caps or crowns, which experience no change in the basic form, the first digital processing surface can be used as the second processing surface directly. The point clouds or areas obtained can be computationally designed or supplemented as necessary.

According to FIG. 5 (the working surface edge line 11) in the Z direction mirrored the first working surface (ie on the xy surface) at a distance zero, and subsequently in the Y direction (ie to the xz surface) reflected with zero distance , The machining surface is then immersed into a horizontal surface so that the lowest point of Bearbeitύngsflächenkante 11 comes still above this horizontal surface. 9 This surface addition is in the workpiece to be machined 12, according to the space available, placed. This surface addition is now being processed from the top with a router 10th Along the working surface edge 11 the result is a vertical cam surface. 13

The workpiece 12 is rotated in the X-axis by 180 degrees in the jig. Thereby any displacement of the zero point in the coordinate system of the working surface of the machine coordinate in the xy direction is corrected in the machine control. Taking into account the workpiece thickness is obtained as the new machine zero point to the placement of the second working surface of Fig. 6 and 7 show the second processing surface, as placed over the first in the same coordinate system, wherein the edge profile of the machining surface is further pulled in Z-direction.

The millings 15 of the first surface and the milling addition of the second surface with its extension in the Z direction, overlap. Thus the finished product, which is only on the retaining webs 7 (see Fig. 7) in the workpiece 12 held formed. These are then cut and sanded.

It should additionally be noted that on the z-axis, the wall thickness may be varied in the z-axis by moving the two processing surfaces to each other. The lateral xy cement gap can be achieved in that the diameter of the tool is smaller for the first processing side to be effective is given. The wall thickness of caps and crowns in the xy direction can be achieved in that the diameter of the tool for machining the second side is greater is indicated as effective.

but the different surface or mass can be size reduction factors for the xyz axes and / or by shifting the curves reach each other by individual consumers.

For processes that subsequent shrinkage (such as sintering processes) experience can be adapted to the digitized surfaces by single or holistic factors for the xyz axes in three dimensions so that they again meet the desired gauge blocks in the final state.

Both work surfaces can be individually expanded as needed with CAD designs and / or combined.

Fig. 8 shows, finally, a bridge δgliedrige numeral list prepared by the process described

Periodontal on preparations tooth or abutment

preparation border

gums

intermediary

footbridge

Machining holding web special allowance horizontal immersion area

milling cutter

Edge course of the working surface

Workpiece vertical cam surface

milling

Claims

claims
1. A method for producing a dental prosthesis under conditions other than dental caps, crowns, bridges, attachment, by means of a computer-controlled apparatus, characterized in that a first of the optics of the Z-axis digitized area of ​​the relevant dentition the basis for the first and second digitized aufmodellierten surface of the dentition from the optics of the Z-axis provides the basis for the second processing section.
2. The method according to claim 1, characterized in that at least in dental caps and crowns, the first digitized surface is also the basis for the second processing section.
3. The method according to claim 1 and / or 2, characterized in that both processing sites can be combined with any number of additional or extended surfaces digitized by CAD.
4. A process for preparing a denture under conditions other than dental caps, crowns, bridges, attachment, by means of a computer-controlled apparatus, characterized in that a construction of single or multiple structures on a dental impression model is produced with wax or other materials, and fitted or, and that there is a through digitize from the optics of the Z-axis by means of a Vermesssystems the basis of a machining side.
5. The method according to claim 4, characterized in that it is in the constructions in particular, intermediate links, footbridges, Bearbeitungshal- testege, is cap and crown Special master masses attachments.
6. The method according to claim 4, characterized in that the working surface obtained can be combined with any number of additional or extended surfaces digitized by CAD.
7. The method according to one or more of claims 1-6, characterized in that the creation of a dentition model by fitting and applying modeled or fixed parts are brought individually or all together as a denture model is that the surface directly from the appearance of the Z axis are digitized and laying the foundation for the second working surface is created.
8. The method according to claim 7, characterized in that the solid parts nensonderaufmasse as intermediate members, bridging webs, retaining webs processing, cap and on alligator, attachments, are formed.
9. The method according to one or more of claims 1-6, characterized in that the creation of a dentition model by fitting and applying modeled or fixed parts individually or all be brought together in such a teeth model is that the surface directly from the appearance of the Z axis are digitized, laying the foundation for the second processing surface is created, and that thus directly the preparation border is created by tooth stumps or abutments.
10. A method for manufacturing a dental prosthesis according to one or more of claims 1-9 by means of a computer-controlled apparatus, characterized in that in all directions (x, y, z) in three dimensions all enlargement ratios of both the first processing side as well as the second processing page customization be adjusted.
PCT/CH2003/000009 2002-01-14 2003-01-12 Method for producing a dental prosthesis WO2003057067A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH472002 2002-01-14
CH47/02 2002-01-14

Publications (1)

Publication Number Publication Date
WO2003057067A1 true true WO2003057067A1 (en) 2003-07-17

Family

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Family Applications (1)

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PCT/CH2003/000009 WO2003057067A1 (en) 2002-01-14 2003-01-12 Method for producing a dental prosthesis

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1782755A2 (en) * 2004-06-10 2007-05-09 Willytec GmbH Method and device for producing dentures
US7899221B2 (en) 2001-11-08 2011-03-01 Institut Straumann Ag Devices and methods for producing denture parts
US8922635B2 (en) 2000-11-08 2014-12-30 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19930564A1 (en) * 1999-04-16 2000-10-19 Kaltenbach & Voigt Ceramic molding, especially medical or dental prosthesis or implant, is produced by machining pressed green ceramic body to desired inner and-or outer contour prior to sintering
EP1088620A1 (en) * 1998-05-28 2001-04-04 Kabushiki Kaisya Advance Method and device for machining prosthetic appliance and prosthetic block

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1088620A1 (en) * 1998-05-28 2001-04-04 Kabushiki Kaisya Advance Method and device for machining prosthetic appliance and prosthetic block
DE19930564A1 (en) * 1999-04-16 2000-10-19 Kaltenbach & Voigt Ceramic molding, especially medical or dental prosthesis or implant, is produced by machining pressed green ceramic body to desired inner and-or outer contour prior to sintering

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8922635B2 (en) 2000-11-08 2014-12-30 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation
US8982201B2 (en) 2000-11-08 2015-03-17 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation
US7899221B2 (en) 2001-11-08 2011-03-01 Institut Straumann Ag Devices and methods for producing denture parts
EP1782755A2 (en) * 2004-06-10 2007-05-09 Willytec GmbH Method and device for producing dentures
EP1782755A3 (en) * 2004-06-10 2007-11-21 Aepsilon Rechteverwaltungs GmbH Method and device for producing dentures

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