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EP1874219A1 - Procede d'adaptation d'un element prothetique dentaire represente sous la forme d'un ensemble de donnees 3d - Google Patents

Procede d'adaptation d'un element prothetique dentaire represente sous la forme d'un ensemble de donnees 3d

Info

Publication number
EP1874219A1
EP1874219A1 EP06708574A EP06708574A EP1874219A1 EP 1874219 A1 EP1874219 A1 EP 1874219A1 EP 06708574 A EP06708574 A EP 06708574A EP 06708574 A EP06708574 A EP 06708574A EP 1874219 A1 EP1874219 A1 EP 1874219A1
Authority
EP
European Patent Office
Prior art keywords
tooth
contact
contact region
contact area
adjacent tooth
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Withdrawn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
EP06708574A
Other languages
German (de)
English (en)
Inventor
Ulrich Orth
Volker Wedler
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
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 EP1874219A1 publication Critical patent/EP1874219A1/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Withdrawn legal-status Critical Current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
    • A61C13/0004—Computer-assisted sizing or machining of dental prostheses

Definitions

  • the invention relates to a method for adapting a tooth replacement part present as a 3D data set, in particular the design of proximal contacts in a dental CAD system.
  • the restoration proposal is present as a 3D data set of the dental prosthesis part to be produced and is therefore also referred to below as a dental prosthesis part or digital dental prosthesis part.
  • the present invention is intended to enable the operator to use the design software to construct approximal contacts according to his ideas on a dental prosthetic item. Presentation of the invention
  • the method according to the invention serves to adapt a digital dental prosthesis part present as a 3D data record, which was created on the basis of a 3D data record of a preparation area, the preparation area comprising the actual preparation site and at least one posterior region. bar leopard.
  • a contact region is defined on the neighboring tooth, and the tooth replacement part is automatically adapted to this contact region.
  • An automatic adaptation is present if, starting from predetermined parameters of the position of the contact area on the neighboring tooth, no further intervention is required.
  • the basic idea of the invention is to provide both the visualization, the changeability and the adaptation of the contact.
  • the location of the contact can either be defined by the user or suggested automatically, or a combination of both.
  • the determination of the position of the contact area by selecting a
  • Point on the neighboring tooth and adjustable parameters for the extension of the contact area around the selected point determine the extent of the contact area.
  • the contact region is formed as an elliptical region.
  • a parameter for the distance of the deformed tooth replacement part to the neighboring tooth in the contact region is adjustable. This has the advantage that an individual adaptation is possible and that depending on the situation in the preparation area a
  • Penetration a plant or a distance is adjustable.
  • a deformation of the dental prosthesis part is advantageously carried out, the dental prosthesis part extending as far as in the direction of the contact region, preferably its center, is deformed until the deformed dental prosthesis part over an entire edge of the contact area has at least the set distance to the adjacent tooth. This ensures that the desired distance for the entire contact area can be produced, so that the size of the contact area is maintained.
  • the tooth replacement part is further deformed within the edge of the contact region such that the deformed tooth replacement part has the set distance to the neighboring tooth over the entire contact region.
  • the surface of the contact area with respect to the deformation direction from the first step is equally formed back, but this is not to be understood in terms of a mathematical sense in terms of aucf the direction.
  • Tooth database stored model of the neighboring tooth is obtained, wherein the model of the neighboring tooth has a predefined contact area.
  • the selected contact area is visually perceptible.
  • the display is done in particular as a coloring of the surface.
  • the selected contact region In order to change the position and the size, it is advantageous for the selected contact region to be variable, namely to be displaceable along the surface of the neighboring tooth and to be variable in its extent.
  • the contact area is drawn by the user. This allows any geometry of the contact area to be realized.
  • Fig. 1 a digital data set of a preparation area
  • Fig. 2A shows the situation from FIG. 1 with a restoration proposal for a dental prosthesis
  • FIG. 2B is a schematic diagram showing the required deformation of the dental prosthesis part
  • FIG. 2C is a further schematic diagram showing the required deformation from a different direction than in FIG. 2B, the
  • FIG. 3 shows the situation from FIG. 2 with one in appropriate
  • Fig. 4A shows a neighboring tooth with a contact area
  • Fig. 4B is a schematic representation of the contact area
  • Fig. 5A-C show a first case with a distance d to the neighboring tooth greater than zero
  • Fig. 6A-C show a second case with a distance d to the neighboring tooth equal to zero, which
  • Fig. 7A-C show a third case with a distance d to the neighboring tooth less than zero.
  • Fig. 1 shows a digital data set of a preparation area 1 which can be obtained from a 3D measurement.
  • the preparation area comprises the actual preparation site 2 as well as a first adjacent tooth 3 and a second adjacent tooth 4.
  • FIG. 2a the situation of FIG. 1 with a restoration proposal for a tooth replacement part 5 at the preparation site 2.
  • the restoration proposal for the tooth replacement part 5 was calculated on the basis of design rules and it can be seen that there is a gap 6 between the restoration proposal of the tooth replacement part 5 and the neighboring tooth 3, see also the schematic diagrams in FIGS. 2B and 2C, which will be explained later.
  • FIG. 3 the situation of FIG. 2a with a tooth replacement part suitably adapted to the neighboring teeth
  • Fig. 4a therefore, the neighboring tooth 3 is shown with a contact region 8 and a center 9 of the contact region 8.
  • a contact region 8 is first selected on the adjacent tooth 3.
  • the user marks, for example, the center point 9 of the contact area 8.
  • the contact area 8 has a surface area. expansion over part of the surface of the adjacent tooth 3.
  • the size of the areal extent can be set by the user via corresponding parameters. See the picture in Fig. 4b.
  • the contact area 8 is shown here as an ellipse and the user can change the size of the ellipse by changing the major and minor axes L, B.
  • the center point 9 of the contact area 8 can be displaced on the surface of the neighboring tooth, for example when a mouse pointer is pressed into the area 8 and the mouse is moved.
  • the tooth replacement part 5 is subsequently deformed to the contact region 8 of the adjacent tooth 3 taking into account a predetermined parameter for the distance d which can be set by the user, see the illustration in FIG. 2b as a dashed course of the deformed dental prosthesis part 5 '.
  • the tooth replacement part 5 is deformed in a region 10 in the direction 11 of the contact region 8 to such an extent that the desired distance is reached at the edge 12 of the contact region 8.
  • the surface 10 of the deformed dental prosthesis part 5 generally penetrates at least piecewise into the outer contour of the adjacent tooth 3.
  • the tooth replacement part 5 is thus deformed so far in the direction of the contact region 8, preferably the center 9, until the deformed dental prosthesis part 5 'has over the entire edge 12 of the contact region at least the set distance to the adjacent tooth 3.
  • the deformation happens over a large area and expiring towards the outside.
  • the contact area 8 on the neighboring tooth is usually selected by the user such that the center 9 of the marked contact area 8 lies approximately opposite a contact point 13 contained in the restoration proposal, which is already used for the construction of the restoration proposal and whose position is therefore known.
  • This contact point 13 in the surface area 10 of the dental prosthesis part 5 to be deformed can be seen in FIG. 2a be displayed in order to provide a selection aid for the contact area at the neighboring tooth.
  • the contact point of the restoration proposal for the dental prosthesis part 5 can be projected in order to facilitate the arrangement of the contact region 8 on the adjacent tooth.
  • another deformation direction can be selected, such as a deformation in the opposite direction of the normal in the center 9, represented by an arrow. This is useful if the contact point of the dental prosthesis part 5 has a strong offset relative to the contact region on the adjacent tooth.
  • FIG. 2C is a further schematic diagram for illustrating the required deformation of the dental prosthesis part 5 from a different direction than in FIG. 2B, namely from one direction 11 from below the center 9 of the contact region 8 on the adjacent tooth 3.
  • the gap 6 is partially filled at this time.
  • a deformation direction sets in, which is the reverse of the direction in the first step.
  • a transition region 14 (FIGS. 5-7) is smoothed between the contact region 15 formed on the tooth replacement part and the surface of the tooth replacement part 7 in the vicinity of the contact region 15.
  • the toothed portion 7 should have a distance d from the neighboring teeth that is greater than zero. In this case, a gap arises between the tooth replacement part 7 and the neighboring tooth 3 at the end.
  • the tooth replacement part 7 shall rest without play on the selected contact area 8 of the adjacent tooth 3.
  • the distance d is therefore zero.
  • FIG. Figs. 5 to 7 each show the situation in the contact area after the first step, ie after the first deformation of the restoration proposal for the tooth replacement part.
  • the predetermined distance d has been established with the execution of the first step. It is essential that at least the selected contact area 8 has this distance, but it is harmless if the actual contact area that arises is greater than the selected contact area 8.
  • the tooth replacement part 5 'penetrates the adjacent tooth 3 only in part of the contact area 8, but stops at the edge 12 at the predetermined distance d. This penetration is smaller by a distance el, e2 to the edge 12 than the contact region 8.
  • a minimum penetration of thickness d is established throughout the contact area 8 including the edge 12. This results in that the penetration is greater than the contact region 8 by a distance e3, e4 from the edge 12. The required minimum penetration is shown hatched.
  • FIGS. 5B-7B shows the result of the second step of the adaptation.
  • a distance d is set over the entire contact area between the deformed tooth replacement part 5 "and the neighboring tooth 3, so that a gap 6 'is present.
  • the surface of the adjacent tooth 3 and the surface of the deformed dental prosthesis part 5 "lie exactly opposite one another without play.
  • a penetration of the thickness d is produced between the deformed tooth replacement part 5 "and the adjacent tooth 3.
  • the arrows show how the dashed line surface of the dental restoration 5 'changes from the first step.
  • Figs. 5C-7C shows the situation after the third step.
  • a smoothing of the surface of the dental prosthesis part 5 '' so that a smooth transition from the contact area 15 to the adjacent surface 16 of the dental prosthesis 5 'results.

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)

Abstract

L'invention concerne un procédé d'adaptation d'un élément prothétique dentaire (5) numérique représenté sous la forme d'un ensemble de données 3D, cet élément ayant été réalisé à partir d'un ensemble de données 3D d'une zone de préparation (1) comprenant l'emplacement de préparation (2) proprement dit et au moins une dent adjacente (3, 4). Selon l'invention, pour adapter le contact interproximal entre l'élément prothétique dentaire (5) et la dent adjacente (3), une zone de contact (8) est définie sur la dent adjacente (3) et l'élément prothétique dentaire (5) est adapté automatiquement à cette zone de contact.
EP06708574A 2005-03-01 2006-03-01 Procede d'adaptation d'un element prothetique dentaire represente sous la forme d'un ensemble de donnees 3d Withdrawn EP1874219A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005009873A DE102005009873A1 (de) 2005-03-01 2005-03-01 Verfahren zur Apassung eines als 3D-Datensatz vorliegenden Zahnersatzteils
PCT/EP2006/060350 WO2006077267A1 (fr) 2005-03-01 2006-03-01 Procede d'adaptation d'un element prothetique dentaire represente sous la forme d'un ensemble de donnees 3d

Publications (1)

Publication Number Publication Date
EP1874219A1 true EP1874219A1 (fr) 2008-01-09

Family

ID=36575983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708574A Withdrawn EP1874219A1 (fr) 2005-03-01 2006-03-01 Procede d'adaptation d'un element prothetique dentaire represente sous la forme d'un ensemble de donnees 3d

Country Status (5)

Country Link
US (1) US20080124679A1 (fr)
EP (1) EP1874219A1 (fr)
CA (1) CA2599891A1 (fr)
DE (1) DE102005009873A1 (fr)
WO (1) WO2006077267A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502006005596D1 (de) * 2006-09-27 2010-01-21 Degudent Gmbh Verfahren zum Konstruieren eines Verbinders
DE102007012584A1 (de) * 2007-03-13 2008-09-18 Paul Weigl Verfahren zur Kontrolle einer Präparation eines präparierten Zahns mit CAD-Verfahren
DE102007053072B4 (de) * 2007-11-07 2022-06-23 Cadfem Gmbh Vorrichtung und Verfahren zur Verarbeitung von Daten, die Zahnersatzteile betreffen, Commputerprogramm mit Programmcode-Mitteln, und computerlesbares Medium mit durch einen Computer ausführbaren Programm-Code-Anweisungen
DE102011008074A1 (de) * 2011-01-07 2012-07-12 Martin Tank Verfahren und Zahnrestaurationsermittlungssystem zur Ermittlung von Zahnrestaurationen
DE102011005899A1 (de) * 2011-03-22 2012-09-27 Sirona Dental Systems Gmbh Verfahren zur Bearbeitung eines Zahnmodells mittels eines virtuellen Werkzeugs
DE102014222037A1 (de) * 2014-10-29 2016-05-04 Sirona Dental Systems Gmbh Verfahren zur Erstellung eines Modells eines Zahnersatzteils
FR3054691A1 (fr) 2016-07-28 2018-02-02 Anatoscope Procede de conception et de fabrication d'un appareillage personnalise dont la forme est adaptee a la morphologie d'un utilisateur
US11351011B1 (en) 2021-06-03 2022-06-07 Oxilio Ltd Methods and systems for determining tooth structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10252298B3 (de) * 2002-11-11 2004-08-19 Mehl, Albert, Prof. Dr. Dr. Verfahren zur Herstellung von Zahnersatzteilen oder Zahnrestaurationen unter Verwendung elektronischer Zahndarstellungen
US7228191B2 (en) * 2003-05-02 2007-06-05 Geodigm Corporation Method and apparatus for constructing crowns, bridges and implants for dental use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006077267A1 *

Also Published As

Publication number Publication date
WO2006077267A1 (fr) 2006-07-27
DE102005009873A1 (de) 2006-09-07
CA2599891A1 (fr) 2006-07-27
US20080124679A1 (en) 2008-05-29

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