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WO2014170111A1 - Procédé de fabrication d'un modele de dentition de precision pour la fabrication/l'adaptation d'une prothese dentaire - Google Patents

Procédé de fabrication d'un modele de dentition de precision pour la fabrication/l'adaptation d'une prothese dentaire Download PDF

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Publication number
WO2014170111A1
WO2014170111A1 PCT/EP2014/056203 EP2014056203W WO2014170111A1 WO 2014170111 A1 WO2014170111 A1 WO 2014170111A1 EP 2014056203 W EP2014056203 W EP 2014056203W WO 2014170111 A1 WO2014170111 A1 WO 2014170111A1
Authority
WO
WIPO (PCT)
Prior art keywords
teeth
tooth stump
dental prosthesis
preform
model
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.)
Ceased
Application number
PCT/EP2014/056203
Other languages
German (de)
English (en)
Inventor
Steffen Puscher
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.)
VHF Camfacture AG
Original Assignee
VHF Camfacture AG
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 VHF Camfacture AG filed Critical VHF Camfacture AG
Publication of WO2014170111A1 publication Critical patent/WO2014170111A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • A61C13/34—Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
    • 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
    • A61C5/00—Filling or capping teeth
    • A61C5/70—Tooth crowns; Making thereof
    • A61C5/77—Methods or devices for making crowns
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/002—Means or methods for correctly replacing a dental model, e.g. dowel pins; Dowel pin positioning means or methods
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/40—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Definitions

  • the present invention relates to a method for producing a precision denture model for the production / adaptation of a dental prosthesis.
  • the invention also relates to a method for producing or adapting a dental prosthesis.
  • a high-precision machining of the tooth stump within the physical model was not possible due to the teeth surrounding the tooth stump and the associated limited accessibility, so that the separate production of the tooth stump and its subsequent insertion into a bore arranged on the physical model instead of the tooth stump were essential.
  • the known manufacturing methods for a denture model for the manufacture or adaptation of a dental prosthesis were thus complex and in terms of accuracy despite the highest effort only partially satisfactory, so that many patients complained about corresponding misperceptions and the dentures had to be reworked if necessary again.
  • the present invention is therefore concerned with the problem of providing an improved method for producing a high-precision denture model for the production / adaptation of a dental prosthesis, by means of which a rational, cost-effective and also extremely precise production of a precision denture model and thus also a very precise manufacture or adaptation the denture is possible.
  • the present invention is based on the general idea to significantly improve a denture model for the production / adaptation of a dental prosthesis with regard to its accuracy or realism, especially in the range of tooth stumps to be covered by the machined tooth stumps no longer manufactured separately and then via corresponding holes in the overall but remain during production in the actual denture model and at the same time the surrounding teeth of the denture model, be removed, resulting in a much improved accessibility to the precisely machined tooth stumps.
  • a digital actual state of a denture with the teeth contained therein and with at least one dental stump to be provided with the dental prosthesis, for example, to be crowned is generated or received.
  • a raw material model consisting of a carrier plate and a material bead applied thereon in the form of a row of teeth is produced, with pin-like positioning elements projecting in the direction of the material bead and engaging in this positioning element being provided with an unambiguous relative position between the carrier plate and the material bead and thus between the carrier plate and the later dentition model.
  • a preform of the actual condition of the bit with the teeth and the at least one tooth stump is now produced from the raw model, that is to say more precisely from the cured material bead of the raw model. This is done for example by means of a known multi-axis precision milling machine.
  • the preform of the milled bit can be removed from the carrier plate, the at least one tooth stump cut out of the preform and reset to the carrier plate or the at least one tooth stump is separated from the rest of the material bead, that is the other teeth, so that only this remaining material bead with the teeth is removed from the support plate.
  • Both alternative embodiments allow a farther to be machined tooth stump on the support plate without the teeth surrounding this tooth stump or tooth stumps.
  • the sole arrangement of the at least one tooth stump on the support plate, the accessibility of the at least one tooth stump to be machined is significantly improved, since a milling tool is not hindered in particular by the surrounding teeth.
  • the entire preform of the bit removed from the carrier plate becomes the at least one tooth stump cut out and then reset back to the support plate, the positioning ensure that it retains its original position, especially in terms of alignment and height again exactly.
  • the at least one tooth stump to be machined is not removed at all from the carrier plate, so that it also retains its original exact position.
  • the at least one tooth stump of the preform fixed on the carrier plate by means of the positioning elements is then finished, in particular finished milled and / or ground.
  • the remaining teeth can be placed back on the support plate and thereby take over the positioning again their original position exactly, so that now a highly accurate Rezisionsgebissmodell the teeth for the preparation / adjustment of the denture is present, in which in particular Tooth stump has the exact height compared to the surrounding teeth, which could not be guaranteed in the previous manufacturing process in which the tooth stump was made separately and then attached via a hole in the denture model.
  • the method according to the invention thus represents a considerable improvement which, in particular, minimizes or at best even completely eliminates the discomfort of the dental prosthesis wearer which is produced in previous methods.
  • the digital actual condition of the dentition is recorded by means of an intra-oral scanner.
  • Such a direct digital recording of the dentition of a patient allows an immediate presence of a digital data set of the dentition and minimizes in particular the influences or fluctuations occurring in a previous conventional impression taking, in particular in the field of the material and the skill of the dentist.
  • the inclusion of a digital impression of the dentition is also much more pleasant for the patient than the conventional impression taking, whereby an increase in comfort for the patient can be achieved.
  • a conventional Ab- pressure of the dentition taken and from this the digital actual state of the dentition are generated.
  • the initially soft material bead in the form of a U-shaped row of teeth is expediently applied to the carrier plate, the positioning elements being pressed into the material bead.
  • the material bead can be made of a thermosetting plastic-gypsum mixture and has due to the depressed in the material bead positioning after curing a clear relative position to the support plate.
  • the positioning elements are preferably conical, that is tapered to a free end, whereby the material bead, for example, the preform of the actual state of the bit removed from the support plate and can be placed in the same way again exactly on the support plate.
  • the carrier plate Preferably, two parallel rows of positioning elements are provided on the carrier plate, wherein the positioning elements of the two rows are arranged offset from one another, which enables angular and exact positioning or resetting of the one segment onto the carrier plate, particularly when the material bead is separated into individual segments.
  • the carrier plate is preferably designed as a reusable plastic model.
  • the present invention is further based on the general idea of a method for the manufacture or adaptation of a dental prosthesis using a precision denture model manufactured according to the previously described method.
  • a separately manufactured dental prosthesis for example a bridge or a crown, is then placed on the at least one finished tooth stump of the precision dental model and arranged on the carrier plate and adapted to the surrounding teeth.
  • an adaptation of the separately manufactured dental prosthesis on the dental stump supporting this denture is possible.
  • the precision dentition model represents an identical image of the real dentition, that is to say of the actual condition of the dentition of the patient. Due to the high precision of the precision denture model, a high-precision adaptation of the dental prosthesis is possible, which is manifested by an increased wearing comfort and an improved longevity of the dental prosthesis.
  • the precision dentition model together with the tooth replacement is inserted into an articulator and the dental prosthesis therein is adapted to the antagonist (s).
  • an articulator is a device for simulating the temporomandibular joint movement, for which purpose the precision teeth model produced by the method according to the invention is mounted in occlusion in the articulator. Subsequently, the articulator is able to simulate the movement of the jaws to each other, which is essential for the preparation of dentures.
  • FIG. 2b is a representation as in Fig. 2a, but with applied bead of material
  • Fig. 3a is a preform of the actual state of the dent withSchonnem
  • FIG. 3b is a view as in Fig. 3a, but in a view obliquely from below,
  • 3c is an oblique view from below of the separated tooth stump
  • FIG. 3d the tooth stump in a state placed on the carrier plate
  • FIG. 4b is a view as in Fig. 4a, but with teeth removed
  • FIG. 6 shows the precision denture model used in an articulator.
  • a method according to the invention for producing a precision denture model 1 for the production / adaptation of a dental prosthesis 2 is described.
  • a digital actual state of a denture 3 with teeth 4 and at least one with is now in a first method step according to FIG the dental prosthesis 2 to be provided tooth stump 5 generated / recorded.
  • an intraocular scanner 6 is used, which directly supplies a digitized form of the dentition 3 together with teeth 4 and at least one tooth stump 5.
  • first of all a conventional impression of the bit 3 can be taken and from this the digital actual state of the bit 3 can be generated.
  • a raw model 7 (compare FIG. 2b) is now to be provided, which consists essentially of a carrier plate 8 and a material bead 9 applied thereto in the form of a row of teeth.
  • two parallel rows of positioning elements 10 are provided, wherein the individual positioning elements 10 of the two rows are arranged offset from one another in order to be able to fix individual segments of a material bead 9 to be sliced segment-like in later method steps.
  • the positioning elements 10 are conical, that is, tapering towards its free end, so that the hardened material bead 9 can be removed more easily and put back in the same position. From this raw model 7, a preform of the actual state of the bit 3 with teeth 4 'and the at least one tooth stump 5' is now produced, for example by means of a multi-axis milling machine. Teeth 4 'and tooth stump 5' denote components of the precision dentition model 1, whereas tooth 4 and tooth stump 5 denote the natural dentition components in the mouth of the patient.
  • the preform of the dentition 3 ' that is, with teeth 4' and the at least one tooth stump 5 ', removed from the support plate 8, the at least one tooth stump 5' separated out of the preform and individually reset to the support plate 8 , This is shown in FIG. 3d. Due to the singular arrangement of only the tooth stump 5 'without the surrounding teeth 4' on the support plate 8, the tooth stump 5 'for further processing, for example by a milling machine, particularly easily accessible from all sides.
  • the at least one tooth stump 5 'of the remaining material bead 9, that is separated from the surrounding teeth 4' then the remaining material bead 9 with the teeth 4 'is removed from the support plate 8, so that also In this case, only the tooth stump 5 'singularly remains on the support plate 8 and thereby can be better edited.
  • a tooth stump 5 ' of course, a plurality of such tooth stumps 5' can be provided. If the tooth stump 5 'to be further processed is arranged individually on the carrier plate 8 and fixed by means of the positioning elements 10, then it can be finished, in particular milled and / or ground.
  • the remaining teeth 4 are again placed on the support plate 8 and take over the positioning elements 10 back to their original position exactly, so that now an exact Rezisionsgebissmodell 1 of the bit 3 for the production / adaptation of the dental prosthesis 2 is present.
  • the material bead 9 Due to the positioning elements 10, which press into the next soft material bead 9, the material bead 9 can later be segmented in the cured state, it being possible, all segments due to the positioning elements 10 of the support plate 8 and, if necessary, again exactly with respect to their original position on the carrier plate 8 to position.
  • a hardening plastic-gypsum mixture can be used for the material bead 9.
  • the inventive method is characterized in that now the tooth stump 5 'in exact height to the surrounding Teeth 4 'of the precision denture model 1 is arranged.
  • this can be ruled out, since due to the positioning elements 10 and the individual arrangement of the tooth stub 5 'during the finishing process on the carrier plate 8, this is not changed at all in terms of its height.
  • the precision denture model 1 of the dentition 3 produced in this way is now used to adapt the dental prosthesis 2, for example a bridge or a crown, with the separately prepared dental prosthesis 2 being placed on the at least finished tooth stump 5 'of the precision denture model 1 and attached to the surrounding teeth 4 'is adjusted. Subsequently, the precision dentition model 1 together with dental prosthesis 2 can be inserted into an articulator 11 (see FIG. 6) and the dental prosthesis 2 can be adapted therein to the antagonist (s) 4, ie the opposite teeth 4.

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 de fabrication d'un modèle de dentition de précision (1) selon lequel un état réel numérique d'une dentition (3) est généré/capté, un modèle brut (7) composé d'une plaque support (8) et d'un boudin de matière (9) placé sur cette plaque est fabriqué, une préforme de l'état réel de la dentition (3) est fabriquée à partir du modèle brut (7), puis la préforme est séparée de la plaque support (8), au moins un moignon de dent (5') est séparé de la préforme et replacé sur la plaque support (8) ou bien un moignon de dent (5') est séparé des autres dents (4') et celles-ci sont enlevées de la plaque support (8), ensuite, le moignon de dent (5') de la préforme, fixé sur la plaque support (8) au moyen d'éléments de positionnement (10), est soumis à un travail de finition, notamment fraisé et/ou poncé, et les autres dents (4') sont replacées sur la plaque support (8) de manière à obtenir un modèle de dentition de précision (1) exact de la dentition (3) pour la fabrication/l'adaptation de la prothèse dentaire (2).
PCT/EP2014/056203 2013-04-18 2014-03-27 Procédé de fabrication d'un modele de dentition de precision pour la fabrication/l'adaptation d'une prothese dentaire Ceased WO2014170111A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013207048.9A DE102013207048A1 (de) 2013-04-18 2013-04-18 Verfahren zur Herstellung eines Präzisionsgebissmodells für die Herstellung/Anpassung eines Zahnersatzes
DE102013207048.9 2013-04-18

Publications (1)

Publication Number Publication Date
WO2014170111A1 true WO2014170111A1 (fr) 2014-10-23

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Application Number Title Priority Date Filing Date
PCT/EP2014/056203 Ceased WO2014170111A1 (fr) 2013-04-18 2014-03-27 Procédé de fabrication d'un modele de dentition de precision pour la fabrication/l'adaptation d'une prothese dentaire

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Country Link
DE (1) DE102013207048A1 (fr)
WO (1) WO2014170111A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112040904A (zh) * 2018-04-20 2020-12-04 瑞派德夏博有限公司 用于牙科模型的牙桩、牙科模型、用于生产牙桩的方法和用于生产牙科模型的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004030565A1 (fr) * 2002-10-03 2004-04-15 Cadent Ltd. Procede de preparation d'un modele physique de platre
WO2007084768A1 (fr) * 2006-01-20 2007-07-26 3M Innovative Properties Company Fabrication de protheses dentaires a partir de modeles numeriques

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004030565A1 (fr) * 2002-10-03 2004-04-15 Cadent Ltd. Procede de preparation d'un modele physique de platre
WO2007084768A1 (fr) * 2006-01-20 2007-07-26 3M Innovative Properties Company Fabrication de protheses dentaires a partir de modeles numeriques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112040904A (zh) * 2018-04-20 2020-12-04 瑞派德夏博有限公司 用于牙科模型的牙桩、牙科模型、用于生产牙桩的方法和用于生产牙科模型的方法

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Publication number Publication date
DE102013207048A1 (de) 2014-10-23

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