EP2026711A1 - Ébauche pour une partie de prothèse dentaire et procédé de fabrication d'une partie de prothèse dentaire - Google Patents

Ébauche pour une partie de prothèse dentaire et procédé de fabrication d'une partie de prothèse dentaire

Info

Publication number
EP2026711A1
EP2026711A1 EP07725678A EP07725678A EP2026711A1 EP 2026711 A1 EP2026711 A1 EP 2026711A1 EP 07725678 A EP07725678 A EP 07725678A EP 07725678 A EP07725678 A EP 07725678A EP 2026711 A1 EP2026711 A1 EP 2026711A1
Authority
EP
European Patent Office
Prior art keywords
blank
dental prosthesis
tooth
shape
counterpart
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Withdrawn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
EP07725678A
Other languages
German (de)
English (en)
Inventor
Stephan Holzner
Gerhard Weber
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.)
Institut Straumann AG
Original Assignee
Aepsilon Rechteverwaltungs 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 Aepsilon Rechteverwaltungs GmbH filed Critical Aepsilon Rechteverwaltungs GmbH
Publication of EP2026711A1 publication Critical patent/EP2026711A1/fr
Withdrawn legal-status Critical Current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
    • A61C13/0022—Blanks or green, unfinished dental restoration parts

Definitions

  • the invention relates to a blank for a tooth replacement part and to a method for producing a tooth replacement part.
  • the blanks usually have simple geometric shapes, such as the shape of a disc of a given thickness.
  • material is removed from the blanks both from the upper and the underside of the blank (the underside being made accessible, for example, by turning the blank around for machining) so as to give the tooth replacement part the desired shape.
  • the cost of the blank material is not negligible, so that it is an object of the present invention to provide a blank and a method of manufacturing a dental prosthesis, which requires less blank material.
  • the blank has a first portion (such as the top) given by its surface already having the desired shape.
  • the upper part is the part of a tooth that is visible on natural teeth because it is not covered by gums.
  • the blank may thus already have on one side or on a surface or in a section the structure of the purchase surface of a tooth and of adjacent regions thereof.
  • a blank for a dental prosthetic item may have in one section the shape of a portion of a dental prosthesis that is to be clad with a occlusal surface and other visible parts a tooth is provided. This part of a dental prosthesis part is also called upper part.
  • the remainder (the second portion) of the blank has a simple geometric shape, so that here is a supply of material is given, which can be brought by machining to the desired shape.
  • the shape of the lower part is, for example, columnar, wherein the cross section may be square, rectangular, circular, elliptical, triangular or otherwise. He may also have rounded corners. It is also possible that the cross section corresponds to the outline of the upper part when looking in the direction of the «Avemlache.
  • the blank may include one or more of the materials such as plastic, metal, stainless steel, ceramic, zirconia, etc. Combinations of these materials are possible.
  • a blank having different colors at different locations Since natural teeth are usually not monochrome, but have different colors in different places, it is advantageous if the blank also has different colors at different locations.
  • the different colorations need not capture the entire blank, but advantageously only the first section.
  • such a coloring is relevant in which the upper side has a darker color in depressions and / or grooves and / or cracks, since this is usually the case with natural teeth.
  • the coloring can be both superficial, and it is also possible that the blank is at least partially colored (in particular in the region of the first section).
  • the blank has projections and / or depressions with which the blank can be held.
  • the projections and / or recesses may be attached to the sides, for example, so that machining of both the first and second sections is possible.
  • recesses and / or projections at the transition between the first and the second section are advantageous.
  • At least two, three, four or more recesses and / or protrusions are advantageous, these preferably being attached to different sides of the blank are provided in order to achieve a good grip of the blank.
  • the blank can be held with jaws or other staples or the like on the projections and the recesses.
  • a blank is brought by a machining process in the desired shape of a dental prosthesis, but only parts or a part of the blank must be processed and another part or other parts can remain unprocessed, as they already have desired final shape.
  • a method in which the processing of the blank takes place only from a half space out is machining only from one direction, as is possible, for example, with a three-axis milling machine.
  • the direction is called feed direction.
  • such a method is advantageous in which the blank does not have to be re-clamped or turned over and yet can be processed with only one milling head. This is made possible by the fact that a part of the blank already has the desired shape and no longer needs to be processed. As a result, dental prostheses can be produced relatively quickly and the procedure is much easier.
  • the dental prosthetic item made by the method may be an inlay, an overiay, a coping, a crown, a trim, a bridge, or other component of a dental prosthetic item, such as a portion of an implant.
  • a dental prosthesis part for a given tooth position such as the foremost or another molar tooth
  • the canine or a particular incisor different blanks are usually required.
  • the selection of a blank from a plurality of blanks for a particular tooth position, wherein the different blanks differ in shape usually allows the selection of a suitable shape of the counter-bite blank with a corresponding top.
  • a denture part finished with respect to the mold can also be dyed or colored accordingly.
  • one set includes one of the blanks described above.
  • the kit further comprises at least one counterpart that matches the first section or the second section.
  • the blank can be held with the counterpart to edit the accessible part of the blank, z. B. by milling.
  • Figure 1 is a schematic three-dimensional representation of various blanks
  • Figure 2 is a schematic three-dimensional representation of a dental prosthesis part
  • Figure 3 is a schematic three-dimensional view of a second dental prosthesis part
  • Figure 4 is a schematic three-dimensional representation of a blank for a two-part bridge
  • Figure 5 is a schematic view of a bit and various blanks
  • Figure 6 is a schematic three-dimensional representation of a blank having a recess and a projection
  • Figure 7 is a schematic three-dimensional representation of a counterpart.
  • FIG. 1a shows a blank 1a for a tooth replacement part.
  • the blank 1a has an upper surface 2a, which has the shape of a chewing surface of a molar tooth. Furthermore, the blank 1a has a lower part 3a which has a rectangular cross section and is columnar.
  • a blank is shown, as it may be suitable for a canine.
  • the blank 1b here has a top 2b, which corresponds to the occlusal surface of a canine.
  • the lower part 3b has a columnar shape, wherein the cross section is here round or irregular. When viewed from above (in Figure 1b from above) on the upper part 2b results in an approximately semicircular cross-section with rounded corners.
  • FIG. 1c shows a blank for a tooth replacement part which can replace two teeth (here two incisors).
  • the blank may be formed for the manufacture of a dental prosthetic item for replacement of one, two, three, four or more teeth.
  • the upper part 2c here has the shape of two juxtaposed incisors.
  • the lower part 3c of the blank 1c has a substantially rectangular cross-sectional shape but is slightly bent. This shape results from the top view of the chewing surfaces 2c.
  • FIG. 2 shows a finished tooth replacement part as it was produced from the blank 1a (see FIG. 1a).
  • the upper part 2a is unchanged, only at the bottom of the blank 1a was processed, so that the desired shape 5 results.
  • This form here has a recess 6, with which the dental prosthesis part can be placed on a bridge or an implant post.
  • FIG. 3 a tooth replacement part, as can be produced from the blank 1c, is correspondingly illustrated.
  • the upper part 2a is unchanged in shape, only the lower part 7 has been processed.
  • FIG. 4 shows a blank 1d for the production of a bridge.
  • the bridge has on its top two frusto-conical elevations 8a, 8b. On these increases panels can be applied, which resemble optically teeth. These panels then have the chewing surfaces.
  • the lower part 3d has a columnar shape which has an approximately elliptical cross section.
  • FIG. 4 shows a blank 1d for a two-part bridge. However, it is also possible to provide three, four, five or more unit bridge blanks.
  • FIG. 5 a shows schematically a series of teeth 11 which correspond to a maxillary dentition.
  • Reference numeral 12 denotes the associated teeth of the mandibular dentition.
  • a tooth is missing, which is to be replaced by a dental prosthesis.
  • the tooth gap is at the position of the second molar tooth.
  • Blank 10a has on its upper side two differently high bumps, while the blank 10b has approximately two equal height bumps.
  • Blank 10c results at least in its upper side in approximately mirror image of blank 10a and also has two different heights on hump.
  • the blank 10d has a substantially flat upper side while the blank 10e has an outwardly curved upper side.
  • FIG. 6 shows a blank 1 which is provided, for example, with a projection 16 and a recess 17.
  • a blank 1 which has only projections 16 or only depressions 17, since thus a holder of the blank 1 is easier.
  • a blank 1 which has only projections 16 or only depressions 17, since thus a holder of the blank 1 is easier.
  • two holding elements one recess and one projection
  • one, two or three holding devices may be provided on one, two or three sides.
  • one, two or three holding devices can be provided on one, two, three or four sides. Also advantageous is an arrangement of retaining elements on opposite sides.
  • the holding devices are provided at the transition between the first and the second section. In a holder at these locations, the first and / or second section remains substantially accessible for editing substantially.
  • the projections 16 may be removed in a finishing step.
  • a counterpart 11 is shown that can form a set together with a blank.
  • the counterpart 11 has a receptacle 12 which is adapted to the shape of the blank.
  • FIG. 7 shows a counterpart whose receptacle is adapted to the first section of the blank of FIG. 1b or 6.
  • the receptacle 12 does not have to be an exact negative mold of a part of the shape of the blank, but merely needs to be adapted to allow holding of the blank. Optimal for this, however, is such a negative form.
  • the recording can be adapted to both the first and the second section or only one part of each.
  • the respective exposed part can then be processed accordingly.
  • the counterpart 11 has a bracket 13 which is pivotally mounted about the axis 18.
  • This bracket 13 can be pivoted to the side of the counterpart, on which the receptacle 12 has an opening.
  • the blank may, for example, have projections 16 (see Fig. 6) on its periphery which, when the blank is inserted into the receptacle, rest on the surface of the counterpart 11 or are slightly spaced therefrom with the blank inserted.
  • the clip 13 can be pivoted after insertion of the blank due to the recess 14 on the blank over to the opening of the receptacle 12 out (in Fig. 7 down). It then presses the blank on the projections into the receptacle 12, whereby a firm grip is ensured.
  • Other shapes and types of staples or the like are possible to hold the blank in the counterpart 11.
  • brackets can be provided which can be pivoted into recesses on the blank side in order to hold the blank.
  • the counterpart 11 in Fig. 7 surrounds the blank at least partially fully. However, it is also possible that the counterpart 11 has recesses and / or holes, with which a machining of that portion of the blank is held by the counterpart is possible. So z. B. the front third of the counterpart in Fig. 7 are missing, so that the receptacle 12 is also accessible from the front side. The blank is then still held by the counterpart 11, however, the corresponding portion of the blank is accessible for processing. With other counterparts, in which compared to FIG. 7, for example the top, bottom or back third or right half is missing (so that the top of the blank looks out to the right of the counterpart hole) other sections of the blank may be accessible, although the blank is always held at the same (first) section.

Landscapes

  • Health & Medical Sciences (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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

La présente invention concerne une ébauche (1a) pour une partie de prothèse dentaire, comprenant une première section (2a) qui présente la forme d'une section d'une dent ou d'une partie de prothèse dentaire et une seconde section (3a), qui présente une réserve de matériau pouvant prendre une forme souhaitée par usinage, par exemple par fraisage. L'invention concerne en outre un procédé de fabrication d'une partie de prothèse dentaire, selon lequel une ébauche est usinée par le biais d'un procédé d'abrasion, tel que le fraisage ou l'usinage au laser, afin d'obtenir une forme souhaitée d'une partie de prothèse dentaire. Seules certaines parties de l'ébauche sont usinées et d'autres parties restent à l'état brut, car elles présentent déjà la forme finale souhaitée. L'invention concerne également un ensemble comprenant au moins une ébauche susmentionnée et au moins un pendant qui présente un logement adapté au moins en partie à la première section et/ou à la seconde section pour maintenir l'ébauche.
EP07725678A 2006-06-01 2007-05-30 Ébauche pour une partie de prothèse dentaire et procédé de fabrication d'une partie de prothèse dentaire Withdrawn EP2026711A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025660A DE102006025660A1 (de) 2006-06-01 2006-06-01 Rohling für ein Zahnersatzteil und Verfahren zum Herstellen eines Zahnersatzteils
PCT/EP2007/004789 WO2007137837A1 (fr) 2006-06-01 2007-05-30 Ébauche pour une partie de prothèse dentaire et procédé de fabrication d'une partie de prothèse dentaire

Publications (1)

Publication Number Publication Date
EP2026711A1 true EP2026711A1 (fr) 2009-02-25

Family

ID=38329960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07725678A Withdrawn EP2026711A1 (fr) 2006-06-01 2007-05-30 Ébauche pour une partie de prothèse dentaire et procédé de fabrication d'une partie de prothèse dentaire

Country Status (4)

Country Link
US (1) US20070290385A1 (fr)
EP (1) EP2026711A1 (fr)
DE (1) DE102006025660A1 (fr)
WO (1) WO2007137837A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006021640B3 (de) * 2006-05-08 2007-10-11 Sirona Dental Systems Gmbh Verfahren, Rohling, Rohlingssortiment, Zahndatenbank und Rohlingsdatenbank mit vorgefertigter Teilendfläche zur Herstellung von Zahnersatzteilen
DE102008013592A1 (de) * 2008-03-11 2009-10-29 Merz Dental Gmbh Zahnblocksortiment sowie ein geeigneter Rohlingkörper hierfür
DE102009042585A1 (de) 2008-12-15 2010-06-17 Sew-Eurodrive Gmbh & Co. Kg Gussteil, Planetenträger, Hohlwelle und Planetengetriebe
CN104168853A (zh) 2012-02-29 2014-11-26 义获嘉伟瓦登特公司 用于制造牙科修补物的坯件
DE102015002674A1 (de) * 2015-03-03 2016-09-08 Pritidenta Gmbh Rohling zur Herstellung von Zahnersatzteilen, der eine Dentinzone aufweist, die in eine Schmelzzone eingebettet ist
EP3108849B1 (fr) 2016-04-25 2019-04-24 3M Innovative Properties Company Ébauche pour fraisage dentaire à zircone multicouche et procédé de production
US20180098828A1 (en) 2016-10-07 2018-04-12 3M Innovative Properties Company Ceramic dental restorations made by additive manufacturing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813859A (en) * 1997-01-23 1998-09-29 Hajjar; Victor J. Method and apparatus for tooth restoration
AU3954899A (en) * 1998-05-28 1999-12-13 Kabushiki Kaisya Advance Method and device for machining prosthetic appliance and prosthetic block

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007137837A1 *

Also Published As

Publication number Publication date
US20070290385A1 (en) 2007-12-20
DE102006025660A1 (de) 2007-12-13
WO2007137837A1 (fr) 2007-12-06

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