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WO1992008420A1 - Procede et dispositif pour la fabrication d'inlays dentaires - Google Patents

Procede et dispositif pour la fabrication d'inlays dentaires Download PDF

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Publication number
WO1992008420A1
WO1992008420A1 PCT/EP1991/001797 EP9101797W WO9208420A1 WO 1992008420 A1 WO1992008420 A1 WO 1992008420A1 EP 9101797 W EP9101797 W EP 9101797W WO 9208420 A1 WO9208420 A1 WO 9208420A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
impression model
insert blank
copy
carrier
Prior art date
Application number
PCT/EP1991/001797
Other languages
German (de)
English (en)
Inventor
Alfred Kolb
Bernd Ziesing
Original Assignee
Werkzeugmaschinenbau Präzisions-Technik 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 Werkzeugmaschinenbau Präzisions-Technik Gmbh filed Critical Werkzeugmaschinenbau Präzisions-Technik Gmbh
Publication of WO1992008420A1 publication Critical patent/WO1992008420A1/fr

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
    • A61C13/0009—Production methods using a copying machine
    • 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

Definitions

  • the invention relates to a method for producing dental inserts from dental ceramics or similar material by shape grinding, and to a device for carrying out the method.
  • the conventional production of dental inserts takes place in several stages, with the patient requiring at least two sessions with the dentist. After the tooth cavity has been worked out, an impression is made in a first session. The tooth must be provisionally restored. In the dental technology laboratory, a model is made using this impression, after which the tooth insert is cast. In addition to metals, ceramic materials that are fired after shaping are also used as the material. In a second session, the tooth insert is inserted into the tooth cavity.
  • tooth insert should primarily be understood to mean inlays, but also onlays and shell veneers.
  • a method of the type mentioned at the outset for producing tooth inserts in a single session is known (Mörmann / Brandestini / Lutz, "The Cerec System: Computer-Aided Production of Direct Ceramic Inlays in One Session", Journal “Quintessenz” 3/87, Unit No. 6962, pp. 1-14).
  • an optical, computer-assisted measurement of the tooth cavity is carried out.
  • the shape of the tooth insert to be produced is constructed using the means of computer graphics.
  • data are obtained for the control of a profile grinding machine, which is used to produce a semi-finished dental insert from a dental ceramic block.
  • the tooth insert is inserted into the tooth cavity using composite fastening material. Then the final contouring and elaboration of the fissures and bumps takes place.
  • the need to design the shape of the tooth insert on the screen requires that the dentist or his assistants familiarize themselves with the field of computer graphics.
  • the required post-processing of the mechanically prefabricated tooth insert in particular the processing of the occlusal surface and the elaboration of the occlusion by the dentist, is associated with a considerable amount of work and therefore stands in the way of a desired substantial reduction in the time required.
  • the object of the invention is therefore to develop a method of the type mentioned in such a way that complete, all-round finishing of the tooth insert is made possible with very high accuracy using easily learnable method steps, in particular finishing processing after machine production being eliminated.
  • an impression model is formed from a hardening material including the contour of the exposed surface in the fully prepared tooth cavity to be filled, that the impression model is scanned as a copy template by means of a copy button, and that after the impression model in a copy grinding process a tooth insert machined on all sides is produced from an insert blank made of dental ceramic or similar material.
  • the tooth insert produced in this way is not only completely machined, so that expensive post-processing is not necessary , but also corresponds in all dimensions with high accuracy to the impression model and thus also to the tooth cavity to be filled.
  • the method according to the invention can therefore also be used to produce tooth inserts which consist of a material which is in direct connection with the adjacent tooth material without the use of composite material; The prerequisite for this is that a very small gap width between the Tooth insert and the adjacent tooth material is not exceeded. The very high manufacturing accuracy of the gear insert required for this is achieved with the method according to the invention.
  • the copy button and a grinding tool are arranged at a fixed distance from one another and carry out a common relative movement to the impression model and the insert blank also arranged at a fixed distance therefrom. In this way, high copying accuracy is achieved in a very simple manner.
  • a part of the surface is copied in a first setup of the impression model and the insert blank and in a second processing step the remaining part of the surface is copied in a second setup of the impression model and the insert blank, whereby a defined position assignment is maintained in both clampings.
  • the impression model and the insert blank are accommodated in the first clamping on a common first carrier, that after the first processing step the impression model and the partially machined insert blanks are taken over together on a second carrier, and that in the second clamping on this second carrier, the insert blank is finished for inserting teeth.
  • the impression model and the insert blank are preferably recorded on the two carriers by means of adhesive. The joint transfer of the impression model and the insert blank from the first carrier to the second carrier ensures in a particularly simple and reliable manner that the positional assignment of these two parts to one another is maintained with high accuracy.
  • the impression model and the insert blank are taken up in the first clamping and / or in the second clamping by means of mechanical clamping devices.
  • the impression model and the insert blank are preferably clamped in the two clamps at at least three different clamping points. This ensures that a complete mechanical clamping takes place in both clampings, but at different clamping points, so that overall the entire surface of the insert blank or the tooth insert then finished can be machined without the insert blank changing its position during reclamping.
  • An advantageous device for carrying out the method is based on the shape grinding machine described in the introduction, in which a drivable grinding tool is mounted and which has a machine frame and a workpiece holder for the insert blank.
  • the device according to the invention is characterized in that a copy button and the grinding tool are arranged at a fixed distance from one another and that the impression model and the insert blank are received on a common clamping device and can be moved relative to the copy button and the grinding tool in three axes.
  • the device is of relatively simple construction and can be operated easily and without lengthy training. It enables the method according to the invention to be carried out with high accuracy.
  • the term "relative movement” means that the clamping device and / or the copy button with the grinding tool can be arranged so as to be movable, fixedly mounted on the machine frame, and the clamping device has a clamping slide that is movable in two horizontal axes and one vertical axis with respect to the machine frame. All movements required for the copying and processing operation are carried out by the clamping slide, which is preferably moved by hand for this purpose. This ensures a particularly reliable control of all copying and processing movements, so that damage is largely excluded.
  • FIG. 3 in a representation corresponding to FIG. 1, a modified embodiment of a carrier for receiving the impression model and the insert blank,
  • FIG. 5 is a front view and partially in section of a copy grinding machine for performing the described method
  • FIG. 6 is a plan view in the direction of arrow VI in FIG. 5 of the clamping device
  • Fig. 7 is a vertical section through a modified version of the clamping device.
  • 8 is a partial front view, partly in section, of a copy grinding machine of another embodiment
  • FIG. 9 is a partial side view, partly in section, of the device according to FIG. 8,
  • FIGS. 8 and 9 are plan views of the clamping device of the machine according to FIGS. 8 and 9 and
  • FIG. 11 shows a simplified illustration of the clamping device according to FIG. 10 to illustrate the pivoting process.
  • an impression model 1 is produced from a hardening material in the fully prepared tooth cavity to be filled, with the contouring of the exposed surface, in particular the occlusal surface, already taking place , is formed.
  • a tablet-shaped insert blank 2 made of dental ceramic or similar material is provided.
  • a copy button 7 essentially scans the upper side, for example the occlusal surface of the impression model 1, in the first setting shown in FIG. 2b and controls a grinding tool 8, for example a diamond-coated grinding tool, which is mounted at a fixed or permanently adjustable distance from the copy button 7 .
  • the copy button 7 and the grinding tool 8 perform relative movements in three axes with respect to the carrier 3.
  • the movement in the vertical axis takes place by adjusting the height of the copy button 7 together with the grinding tool 8, while the movements in the two horizontal axes are carried out by the carrier 3 accommodated in a clamping device.
  • the carrier 3 is removed from the clamping device of the grinding machine and turned, as shown in Fig. 2d.
  • a second carrier 9 which is similar to the first carrier 3 and also carries two plastic disks 10 and 11.
  • These plastic disks 10 and 11 are each provided with an adhesive wax 12 which, like the adhesive wax 6, serves as an adhesive for receiving the impression model 1 and the insert blank 2.
  • the softening temperature of the adhesive wax 6 used in the first setting is lower than the softening temperature of the adhesive wax 12 used in the second setting.
  • the first carrier 3 is pressed against the second carrier 9, the impression model 1 and the partially machined insert blank 2 each pressing into the adhesive wax 12 and being fixed there.
  • the impression model 1 and the insert blank 2 are detached from the first carrier 3 by means of a heated blade, which can then be removed from the second carrier 9 together with the centering pins 13.
  • the remnants of the adhesive wax 6 are removed from the impression model 1 and from the insert blank 2 using a probe or a sharp blade.
  • the carrier 9 is received in the clamping device of the grinding machine for the second processing step (FIGS. 2f, g).
  • the carrier 9 is moved in the two horizontal axes in such a way that the copy button 7 completely scans the peripheral surface and the upper surface of the impression model 1, the grinding tool 8 processing the remaining surface of the insert blank 2 in the manner already described (FIG. 2f , g).
  • the carrier 9 is then removed from the clamping device of the grinding machine.
  • the impression model 1 and the tooth insert made from the insert blank 2, which is finished on all sides, are detached with a heated blade and freed from the residues of the adhesive wax 12.
  • the tooth insert thus produced can be placed in the Tooth cavity are used;
  • the impression model 1 used for production in the copy grinding process is disposed of.
  • plastic disks 4, 5 and 10, 11 are expedient so that damage to the carrier 3 or 9 is avoided during the vertical relative movement when the outer contour of the insert blank 2 is ground.
  • the plastic washers 4, 5, 10 and 11 can be replaced after repeated use.
  • Fig. 3 shows a modified embodiment of the carrier 3 or 9.
  • the impression model 1 and the insert blank 2 are not clamped by adhesive wax, but by means of mechanical clamping devices 16.
  • This mechanical mount can be used in the first setup (FIG. 2a) and / or in the second setup (2f).
  • the described embedding in the adhesive wax 12 takes place in the second clamping.
  • a modification of the copy grinding process is explained with reference to FIG. 4. If the circumferential contour of the tooth insert to be produced deviates only relatively little from a round shape and in particular has no steep rises in the circumferential direction, after the first machining step, as shown in FIG.
  • the second machining step can take place in such a way that both the impression model 1 and the insert blank 2 are each fastened to a turntable 17 or 18 by means of the adhesive wax 12.
  • the turntables 17, 18 are driven synchronously and in the same direction; the copy button 7 and the grinding tool 8 can be moved together in the horizontal direction and the vertical direction.
  • the copy button 7 is pressed resiliently against the circumference of the impression model 1. While that Rotating the impression model 1 and the insert blank 2 in the same direction and synchronously, the grinding tool 8 processes the circumference of the insert blank 2.
  • a machine frame 19 has two vertical guide columns 20, on which a cross slide 21 is guided so that it can move vertically.
  • the cross slide 21 carries horizontal guide columns 22, on which a machining support 23 is guided.
  • the cross slide 21 and the machining support 23 can execute vertical infeed movements by means of a vertical spindle 24.
  • the copy button 7 is clamped in a holder 25 on the front of the machining support 23.
  • a drive unit 26 is clamped in the holder 25, the rotationally driven spindle 27 receiving the grinding tool 8.
  • a clamping device 28 used in the form grinding machine has a base plate 29 on which a clamping slide 30 is movably guided in two horizontal axes with respect to the machine frame 19 by means of a cross slide 31. This horizontal movement of the clamping slide 30 is carried out by hand by means of two handles 32 attached on both sides.
  • the carrier 3 is fastened interchangeably on the clamping table 30 by means of a screw 33. In the same way, the second support 9 can be screwed on.
  • a Coolant line 34 enables coolant to be supplied to grinding tool 8.
  • the copy button 7 is a copy pen that mechanically touches the impression model 1 and has a spherical head, which is preferably of the same diameter as the spherical grinding head of the grinding tool 8. This results in a complete match between the scanned impression model 1 and the shaped inlay. If dimensional deviations are desired, the ball head of the copy button 7 can be selected larger or smaller than the grinding tool 8 by the desired dimension.
  • the receiving device 28 can be exchanged for the receiving device 35 shown in FIG. 7.
  • the two turntables 17 and 18, which serve to hold the impression model 1 or the insert blank 2 are each connected via a vertical shaft 36 or 37 to a toothed belt pulley 38 or 39, which are connected to one another by a toothed belt 40 in a drive connection.
  • the shaft 37 is rotated by means of a hand crank 41 via a worm drive 42.
  • the toothed belt 40 drives the shaft 36 synchronously and in the same direction.
  • the horizontal movement of the machining support 23 required when the clamping device 35 is used takes place along the horizontal guide columns 22.
  • the copy button 7 is horizontally adjustable relative to the grinding tool 8.
  • the copy button 7 is in a button holder
  • a dial gauge 47 is clamped on the holder 25 and rests with its sensor on the upper end of the copy probe 7, so that the degree of horizontal adjustment on the dial gauge 47 can be read or set.
  • the diameter of the grinding tool 8 can be selected independently of the diameter of the copy button 7. Different diameters of the grinding tools 8 used or the copy button 7 are compensated for by this horizontal adjustment.
  • This horizontal adjustment also makes it possible to achieve predetermined dimensional deviations between the impression model 1 and the machined insert blank 2.
  • the insert blank 2 can be pre-machined with a predetermined oversize in a first workflow. The final machining can then take place in a second machining operation, with only this excess being removed. This second editing process can this is done with even greater accuracy than if the finishing was done from the full material.
  • the copy button 7 is a deflectable touch sensor which supplies copy control signals via a control device to feed drives which carry out the relative movements in the three axes.
  • the copy grinding machine shown in FIGS. 8 and 9 differs from the previously described copy grinding machine essentially in that the machining support 23 ', on which the copy button 7 and the spindle 27 of the grinding tool 8 are mounted, is firmly attached to the machine frame 19. All movements required for the copying and processing operation are carried out by the clamping slide 30 'of the clamping device 28'.
  • the clamping slide 30 ' can be moved in two horizontal axes by means of a cross slide 48.
  • the movement of the clamping slide 30 'in a third, vertical axis is made possible by vertical guide bushes 49, in which the clamping slide 30' is guided such that it can move vertically relative to the upper part of the cross slide 48.
  • a compression spring 50 which can be a helical spring (as shown in the drawing) or a gas pressure spring, ensures that the clamping slide 30 'is largely balanced.
  • the clamping device 28 has a carrier plate 51, in which two receiving windows 52 and 53 for the impression model 1 and the insert blank 2 are cut out at a distance from one another.
  • a plurality of dowel pins 54 protrude inward from the walls of the receiving windows 52 and 53.
  • the clamping pins 54 are screw pins which are screwed into threaded holes in the carrier plate 51. They each have an inner clamping tip 54a and, at their end projecting outward from the carrier plate, have a handle attachment 54b, for example a corrugated attachment.
  • the dowel pins 54 are screwed inwards by hand until they hold the impression model 1 or the insert blank 2 together after at least three clamping points.
  • numerous threaded bores are provided in the walls of the receiving windows 52 and 53, of which only a few, at least three threaded bores each accommodate a roll pin 54.
  • the threaded bores are not only distributed over the circumference of each receiving window 52 or 53, but - as shown in FIG. 9 - are also arranged above and below the central plane of the receiving window 52 or 53. This large number, for example 30 to 60 Threaded bores make it possible to select the most favorable clamping points depending on the design of the impression model 1 and the insert blank 2.
  • the support plate 51 is mounted on a pivot support 56 which is pivotally mounted in a base frame 55 so that it can pivot about its longitudinal axis 57.
  • the pivot axis 58 of the pivot carrier 57 on the base frame 55 and the pivot axis 57 of the carrier plate 51 in the pivot carrier 57 run horizontally and parallel to one another.
  • the carrier plate 51 equipped in this way is pivoted onto a support 60 into the position shown in FIGS. 8 to 10.
  • One side of the insert blank 2 is machined there.
  • the swivel bracket 56 is then swiveled up and the support plate 51 is swiveled through 180 ° in the swivel bracket 56 and moved back into the machining position.
  • At least three additional dowel pins 54 are screwed into each receiving window 52, 53 there, and the impression model 1 and the insert blank 2 are clamped at further clamping points.
  • the previous clamping pins 54 are removed, so that the previous clamping points in this second clamping are also copied or can be edited. With this type of clamping, it is possible to produce complete crowns in addition to inlays and onlays. Clamping using adhesive is not necessary.
  • the device described can also be used in such a way that the impression model 1 and the insert blank 2 are clamped in one of the two clampings in an adhesive. Then there is no need to change the dowel pin.
  • the impression model 1 and the insert blank 2 have been taken up in the manner already described in the first clamping by means of the clamping pins 54 and a scanning or processing has taken place on one side, the impression model 1 and the insert blank 2 are after the pivoting of the carrier plate 51 in the Machining position included in an adhesive in the second setup. After the adhesive has hardened, the dowel pins 54 are loosened and the carrier plate 51 is pivoted away. The rest of the processing in the second clamping takes place, while the impression model 1 and the insert blank 2 are only included in the adhesive.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

Pour la fabrication d'inlays dentaires en céramique ou matériau similaire une empreinte (1) serve de modèle pour la fabrication de l'implant dentaire par rectification. A cette fin, l'empreinte (1) et une ébauche d'inlay (2) sont fixées sur un support commun (3). Lors d'un premier passage, une rectifieuse par reproduction explore l'empreinte (1) au moyen d'un palpeur de copiage (7) et rectifie une partie de la surface de l'inlay dentaire dans l'ébauche d'inlay (2). Ensuite, l'empreinte (1) et l'ébauche d'inlay (2) sont transférées, tout en conservant leur position relative, sur un second support (9). L'ébauche d'inlay (2) est achevée par rectification par reproduction.
PCT/EP1991/001797 1990-11-19 1991-09-20 Procede et dispositif pour la fabrication d'inlays dentaires WO1992008420A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4036837.8 1990-11-19
DE4036837A DE4036837A1 (de) 1990-11-19 1990-11-19 Verfahren und vorrichtung zum herstellen von zahneinsaetzen

Publications (1)

Publication Number Publication Date
WO1992008420A1 true WO1992008420A1 (fr) 1992-05-29

Family

ID=6418547

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/001797 WO1992008420A1 (fr) 1990-11-19 1991-09-20 Procede et dispositif pour la fabrication d'inlays dentaires

Country Status (5)

Country Link
EP (1) EP0515583A1 (fr)
AU (1) AU8634191A (fr)
DE (1) DE4036837A1 (fr)
WO (1) WO1992008420A1 (fr)
ZA (1) ZA917793B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543258A2 (fr) * 1991-11-17 1993-05-26 Liconic Ag Procédé et dispositif pour la fabrication d'une prothèse dentaire
WO1996005782A1 (fr) * 1994-08-19 1996-02-29 Andreas Dahr Dispositif pour fabriquer des obturations dentaires et similaire
DE202008015565U1 (de) 2007-02-02 2009-02-12 Steger, Heinrich Trägerplatte für eine Kopierfräseinrichtung
DE202005021673U1 (de) 2004-11-25 2009-03-19 Steger, Heinrich Kopierfräseinrichtung zur Herstellung von insbesondere zahntechnischen Werkstücken
US9511425B1 (en) * 2009-11-05 2016-12-06 O'brien Dental Lab, Inc. Jig device for making a dental prothesis or pattern therefor
US10500686B2 (en) * 2017-02-03 2019-12-10 vhf camfucture Aktiengesellschaft Dental milling machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2360797T3 (es) * 2003-04-04 2011-06-09 Xawex Ag Pieza bruta para la fabricación de reconstrucciones dentales y procedimiento para su fabricación.
US20090275000A1 (en) * 2009-04-28 2009-11-05 Yunoh Jung System and Method for Securing Multiple Ceramic Dental Blocks for Milling
WO2012095297A1 (fr) * 2011-01-11 2012-07-19 Nobel Biocare Services Ag Produit de facette dentaire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558717A1 (fr) * 1984-01-26 1985-08-02 Andersson Knut Procede et dispositif pour remplacer la substance d'une dent perdue
DE3643832A1 (de) * 1986-12-20 1988-06-30 Feintechnik Getriebe Gmbh Kopierfraes- und -schleifmaschine
EP0384908A2 (fr) * 1989-02-23 1990-08-29 Nobelpharma AB Méthode de production d'une unité céramique
EP0402720A1 (fr) * 1989-06-13 1990-12-19 Mikrona Technologie Ag Dispositif pour la fabrication de formes, et l'utilisation de ce dispositif pour la fabrication d'inlays, d'onlays et de couronnes dans l'art dentaire.
EP0389461B1 (fr) * 1989-03-23 1993-11-03 Sandvik Aktiebolag Couronnes artificielles et implants buccaux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558717A1 (fr) * 1984-01-26 1985-08-02 Andersson Knut Procede et dispositif pour remplacer la substance d'une dent perdue
DE3643832A1 (de) * 1986-12-20 1988-06-30 Feintechnik Getriebe Gmbh Kopierfraes- und -schleifmaschine
EP0384908A2 (fr) * 1989-02-23 1990-08-29 Nobelpharma AB Méthode de production d'une unité céramique
EP0389461B1 (fr) * 1989-03-23 1993-11-03 Sandvik Aktiebolag Couronnes artificielles et implants buccaux
EP0402720A1 (fr) * 1989-06-13 1990-12-19 Mikrona Technologie Ag Dispositif pour la fabrication de formes, et l'utilisation de ce dispositif pour la fabrication d'inlays, d'onlays et de couronnes dans l'art dentaire.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543258A2 (fr) * 1991-11-17 1993-05-26 Liconic Ag Procédé et dispositif pour la fabrication d'une prothèse dentaire
EP0543258A3 (en) * 1991-11-17 1996-03-20 Liconic Ag Method and device for the production of dental prosthesis
WO1996005782A1 (fr) * 1994-08-19 1996-02-29 Andreas Dahr Dispositif pour fabriquer des obturations dentaires et similaire
WO1996005781A1 (fr) * 1994-08-19 1996-02-29 Andreas Dahr Dispositif de fabrication d'obturations dentaires et similaires
DE202005021673U1 (de) 2004-11-25 2009-03-19 Steger, Heinrich Kopierfräseinrichtung zur Herstellung von insbesondere zahntechnischen Werkstücken
EP2065011A2 (fr) * 2004-11-25 2009-06-03 STEGER, Heinrich Dispositif de fraisage par copiage destiné à la fabrication, notamment de pièces à usiner dentaires
US7556460B2 (en) 2004-11-25 2009-07-07 Heinrich Steger Copy milling device for machining workpieces, in particular for milling dental workpieces
EP2065011A3 (fr) * 2004-11-25 2009-11-04 STEGER, Heinrich Dispositif de fraisage par copiage destiné à la fabrication, notamment de pièces à usiner dentaires
EP2277472A3 (fr) * 2004-11-25 2013-12-11 STEGER, Heinrich Dispositif de fraisage par copiage pour fabriquer notamment des pièces dentaires
DE202008015565U1 (de) 2007-02-02 2009-02-12 Steger, Heinrich Trägerplatte für eine Kopierfräseinrichtung
US9511425B1 (en) * 2009-11-05 2016-12-06 O'brien Dental Lab, Inc. Jig device for making a dental prothesis or pattern therefor
US10500686B2 (en) * 2017-02-03 2019-12-10 vhf camfucture Aktiengesellschaft Dental milling machine

Also Published As

Publication number Publication date
ZA917793B (en) 1992-06-24
EP0515583A1 (fr) 1992-12-02
AU8634191A (en) 1992-06-11
DE4036837A1 (de) 1992-05-21

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