WO2014117871A1 - Procédé de fabrication d'une superstructure dentaire - Google Patents

Procédé de fabrication d'une superstructure dentaire Download PDF

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Publication number
WO2014117871A1
WO2014117871A1 PCT/EP2013/063429 EP2013063429W WO2014117871A1 WO 2014117871 A1 WO2014117871 A1 WO 2014117871A1 EP 2013063429 W EP2013063429 W EP 2013063429W WO 2014117871 A1 WO2014117871 A1 WO 2014117871A1
Authority
WO
WIPO (PCT)
Prior art keywords
dental
superstructure
model
implants
interface information
Prior art date
Application number
PCT/EP2013/063429
Other languages
English (en)
Inventor
Kristofer Frick
Original Assignee
Heraeus Kulzer Nordic Ab
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 Heraeus Kulzer Nordic Ab filed Critical Heraeus Kulzer Nordic Ab
Publication of WO2014117871A1 publication Critical patent/WO2014117871A1/fr

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Classifications

    • 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
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • 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
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • 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 pertains to the field of designing and producing dental implant bridges/bars in the field of dentistry. More particularly the invention relates to a process, where a 3D database is shared for the steps of designing, manufacturing and validating dental implant bridges and bars.
  • the present invention provides a process workflow, where a digital impression, containing at least two dental implants, is scanned directly from the patient's oral cavity and is used for the design and subsequent shaping of a dental superstructure.
  • a dental implant system The goal of a dental implant system is to restore the patient to normal function, comfort, aesthetic, speech and health regardless of the current oral condition.
  • dental implants such as dental implants made of biocompatible titanium, or other biocompatible materials such as zirconia, through insertion into the patient's jawbone.
  • the dental implants allow dental superstructures, such as dental bridges, to be securely anchored to the jaw. A good fit of the dental superstructure is of highest importance, to reduce mechanical stress and enable good function and comfort for the patient.
  • a process for manufacturing a dental superstructure often starts with obtaining a 3D model of the patient's intraoral cavity.
  • the dentist takes a physical dental impression of the patient's teeth, using an elastomeric material.
  • the impression will contain both a negative imprint of the patient's teeth and the impression couplings (fixed in the elastomeric material), providing the implant locations.
  • positive imprint model with couplings at the implant positions can be obtained, commonly in a plaster or gypsum material. From here on, said positive imprint model will be referred to as plaster model.
  • a more recent workflow includes the manufacture of the positive imprint model from a digital 3D model of the patient's teeth.
  • the dentist obtains a digital imprint of the patient's teeth directly at the clinic by using various intraoral scanning techniques, often non-contact optical techniques.
  • Such a system is for example disclosed in US2011/105894.
  • software can create a digital 3D model of the patient's teeth and intraoral cavity.
  • the data is sent to a dental service provider, where it is used for the manufacture of a positive imprint model, using computer-aided design/computer-aided manufacture
  • the positive imprint model has holes that correspond to the implant positions, where analogues that correspond to the patient's implants can be attached.
  • the manufacturing methods are commonly milling and sintering and the material of the model is often a polymer. From here on, said positive imprint model will be referred to as polymer model.
  • the resulting plaster or polymer model with the positive imprint of the patient's teeth will be used for the design and fitting of the dental prosthesis.
  • a prototype of the implant superstructure can now be build up on the plaster or polymer model. Recent methods do this digitally.
  • a digital 3D model of the plaster or polymer model is obtained.
  • software can generate a 3D model of dental implants that fits on the scanned plaster/polymer model.
  • the superstructure prototype or digital design file and plaster or polymer model is now sent to the superstructure manufacturer, who scans the superstructure prototype and plaster model with fitted analogues. Machining instructions for manufacturing of the dental superstructure is generated, to produce a dental implant shaped in accordance (copy mills).
  • the dental superstructure is thus constructed either physically using the plaster or polymer model, or designed digitally from the scan of the physical plaster or polymer model with fitted analogues.
  • the accuracy of the manufacturing process of the dental superstructure model will depend on the quality of the dental plaster or polymer model. If the model has been prepared using a physical dental impression of the patient's teeth, any errors that occurred during the multitude of steps in creating the plaster model, will have a direct impact on the accuracy and fit of the dental superstructure. Similarly, if the model has been created from a digital scan, any manufacturing errors or errors during the mounting of analogues will have a direct impact on the accuracy and fit of the dental superstructure.
  • the present invention preferably seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solves at least the above mentioned problems by providing a method for manufacturing a dental superstructure, such as a bridge or bar framework, comprising: (a) scanning the intraoral cavity of a patient with at least two implanted dental implants to obtain scanned data comprising at least dental implant interface information of said at least two implanted dental implants; (b) creating a 3D numerical model of the dental superstructure, said model matching said dental implant interface information of said at least two dental implants; and (c) real shaping of said dental superstructure based on said 3D numerical model.
  • a dental superstructure such as a bridge or bar framework
  • Fig. 1 illustrates an overview of the process of producing a dental bridge or bar using a fully digitalized process, according to one embodiment of the invention.
  • Fig. 2 shows a flow chart of the method for producing dental bridges or bars using a fully digitalized process, according to one embodiment of the invention.
  • Fig. 1 A system according to one embodiment of the invention is disclosed in Fig. 1 and a flow chart according to one embodiment of the invention is disclosed in Fig. 2.
  • the process workflow comprises the steps of scanning 10 the oral cavity of a person, said person having at least two implants. In this way scanned data comprising at least dental implant interface information of said at least two implanted dental implants is obtained.
  • the number of implants in the oral cavity of the person is at least three, such as 3 or at least 4, such as 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or above.
  • dental implant interface information for the corresponding number of dental implants will be comprised in the scanned data.
  • the scanned data thus forms a digital impression.
  • the digital impression comprises information with regard to at least two dental implants - their location and orientation.
  • the digital impression is then used for designing and subsequent shaping of a dental superstructure, without the need for a physical replica of the dental superstructure or the adjacent elements of the patient's oral cavity.
  • the present invention alleviates at least the problems identified above by alleviating the need for a physical replica of the dental superstructure or the adjacent elements of the patient's oral cavity.
  • the risk of loss of accuracy and accumulation of secondary faults in the shape and fit of the dental superstructure may be decreased.
  • the spatial accuracy can be increased in comparison with a traditional dental plaster/polymer positive impression.
  • the model accuracy requirement may be lower, depending on which application the model is used for, allowing for simpler and more cost effective methods of
  • the method includes obtaining a digital impression of the patient's teeth and existing prosthetic dental implants, by scanning the patient's intraoral cavity, using one or a combination of several intraoral scanning techniques. This procedure suitably takes place at a dental clinic with appropriate equipment for such a digital scan.
  • the scanning data will provide a digital impression of the patients intraoral cavity as well as data for the at least two dental implants.
  • the scan alternatively includes dental and palatal scans and bite registrations, for extensive information of the patient's intraoral cavity.
  • a 3D model of the patient's teeth and intraoral cavity is generated 20 using appropriate software.
  • the 3D model may be numerical.
  • Such software is readily available and is known to the skilled artisan.
  • a suitable dental superstructure is designed to fit the virtual 3D model of the patient's oral cavity, and a 3D numerical model of the dental superstructure is created 30.
  • the 3D numerical model may comprise screw channel information corresponding to said at least two dental implants.
  • the screw channel information is such that the finally obtained superstructure may be screw retained to the at least two dental implants, via insertion of a screw member into the screw channel and subsequent screw retention via screwing the screw member into cooperation with corresponding implant.
  • the 3D numerical model may thus also comprise screw member seat(s) at the bottom of the screw channel(s), said screw member seat(s) matching location and direction of corresponding implant(s).
  • the screw channel information of the 3D numerical model may also be angled or bent, such that a central axis of the screw member seat is angled in relation to at least one central axis of said screw channel.
  • 3D numerical model data is used directly in the manufacturing process 40, without the need for a physical replica of the dental superstructure or the adjacent elements of the patient's oral cavity.
  • the 3D numerical model data may be communicated to the
  • the manufacturing process 40 via a computer network, such as an intra- or internet, from the numerical model data acquiring step 30.
  • the manufacturing method for shaping the real superstructure may for example be milling, sintering or printing.
  • the fit of the manufactured dental superstructure is thus directly correlated to the information from the digital scan of patient's intraoral cavity. Furthermore, the quality assurance of the dental superstructure can directly validate that the coordinates of the at least two dental implants correlates between the digital scan of patient's intraoral cavity and the dental
  • the digital 3D information is shared with a dental superstructure manufacturer, where a CAD file is generated, from the 3D drawing of the dental superstructure, and used for the manufacture of the prosthesis 40. From the 3D numerical model of the dental superstructure, the real shaping 40 of said dental superstructure can take place.
  • a digital model of the positive impression of the patient's teeth can also be manufactured 50 using the provided digital 3D impression of the patient's intraoral cavity.
  • This digital model may then be transformed into a real model 60, through the same CAD/CAM procedure.
  • the real model is milled or sintered in a plastic or plaster material, which easily makes possible to include analogues corresponding to the dental implants in said real model. This can be desired if the prosthesis requires an extra surface layer (such as porcelain), which will be added in a subsequent manual process, since then a real model could be needed to trim the bite of the person, i.e.
  • the present invention has at least the advantage over the prior art that it (i) enables higher spatial accuracy of the dental superstructure, limited only by the quality if the intraoral scan and manufacturing methods; and (ii) removes several sources of potential error from the manufacturing process, by eliminating the manufacture and subsequent rescanning of the "polymer/plaster model".

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

Abstract

L'invention concerne un procédé de fabrication d'une superstructure dentaire, telle qu'une structure de pont. Le procédé comprend (a) le balayage de la cavité intra-buccale d'un patient ayant au moins deux implants dentaires implantés, pour obtenir des données balayées comprenant au moins des informations d'interface d'implant dentaire desdits au moins deux implants dentaires implantés ; (b) la création d'un modèle numérique tridimensionnel (3D) de la superstructure dentaire, ledit modèle correspondant auxdites informations d'interface d'implant dentaire desdits au moins deux implants dentaires ; et (c) le façonnage réel de ladite superstructure dentaire sur la base dudit modèle numérique 3D. L'invention concerne également une superstructure obtenue à partir de ce procédé.
PCT/EP2013/063429 2013-01-31 2013-06-26 Procédé de fabrication d'une superstructure dentaire WO2014117871A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1350114-3 2013-01-31
SE1350114A SE1350114A1 (sv) 2013-01-31 2013-01-31 Metod för att tillverka en dental superstruktur

Publications (1)

Publication Number Publication Date
WO2014117871A1 true WO2014117871A1 (fr) 2014-08-07

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Family Applications (1)

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PCT/EP2013/063429 WO2014117871A1 (fr) 2013-01-31 2013-06-26 Procédé de fabrication d'une superstructure dentaire

Country Status (2)

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SE (1) SE1350114A1 (fr)
WO (1) WO2014117871A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105030350A (zh) * 2015-04-27 2015-11-11 苏州光影口腔医疗科技有限公司 一种基于3d打印的植牙快速成型系统及方法
WO2016131939A1 (fr) * 2015-02-19 2016-08-25 Sirona Dental Systems Gmbh Insert passif de ponts et de nervures d'implant au moyen d'un outil cad/fao pour la création sans modèle de restaurations portées par implant
GR1009203B (el) * 2016-08-08 2018-01-23 Φοιβος Κυριακου Ψαρομματης-Γιαννακοπουλος Μεθοδολογια και διαταξη για την παραγωγη εξατομικευμενων οδοντιατρικων εμφυτευματων στον χωρο της επεμβασης

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6788986B1 (en) * 1999-06-21 2004-09-07 Dcs Forschungs & Entwicklungs Ag Method for producing an individually made, implant-supported tooth replacement
EP1568335A2 (fr) * 2004-02-24 2005-08-31 Cadent Ltd. Methode et système pour concevoir et fabriquer des protheses dentaires et des appareils
EP2289461A1 (fr) * 2006-08-25 2011-03-02 Biomain AB Superstructure dentaire et son procédé de fabrication
US20110105894A1 (en) 2005-03-03 2011-05-05 Cadent Ltd. System and method for scanning an intraoral cavity
US20110183289A1 (en) * 2005-06-30 2011-07-28 Implant Innovations, Inc. Method For Manufacting Dental Implant Components
WO2012064257A1 (fr) * 2010-11-10 2012-05-18 Biomain Ab Bridges et superstructures dentaires, et procédés pour fabriquer ceux-ci
WO2012083959A1 (fr) * 2010-12-22 2012-06-28 3Shape A/S Modelage et fabrication d'une superstructure pour une prothèse dentaire
US20120270179A1 (en) * 2010-10-20 2012-10-25 Astra Tech Ab Method of providing a patient-specific dental fixture-mating arrangement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6788986B1 (en) * 1999-06-21 2004-09-07 Dcs Forschungs & Entwicklungs Ag Method for producing an individually made, implant-supported tooth replacement
EP1568335A2 (fr) * 2004-02-24 2005-08-31 Cadent Ltd. Methode et système pour concevoir et fabriquer des protheses dentaires et des appareils
US20110105894A1 (en) 2005-03-03 2011-05-05 Cadent Ltd. System and method for scanning an intraoral cavity
US20110183289A1 (en) * 2005-06-30 2011-07-28 Implant Innovations, Inc. Method For Manufacting Dental Implant Components
EP2289461A1 (fr) * 2006-08-25 2011-03-02 Biomain AB Superstructure dentaire et son procédé de fabrication
US20120270179A1 (en) * 2010-10-20 2012-10-25 Astra Tech Ab Method of providing a patient-specific dental fixture-mating arrangement
WO2012064257A1 (fr) * 2010-11-10 2012-05-18 Biomain Ab Bridges et superstructures dentaires, et procédés pour fabriquer ceux-ci
WO2012083959A1 (fr) * 2010-12-22 2012-06-28 3Shape A/S Modelage et fabrication d'une superstructure pour une prothèse dentaire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016131939A1 (fr) * 2015-02-19 2016-08-25 Sirona Dental Systems Gmbh Insert passif de ponts et de nervures d'implant au moyen d'un outil cad/fao pour la création sans modèle de restaurations portées par implant
US20180042707A1 (en) * 2015-02-19 2018-02-15 Dentsply Sirona Inc. Passive fit of implant bridges and implant bars by means of a cad/cam tool for the model-free creation of implant-supported restorations
US11259903B2 (en) 2015-02-19 2022-03-01 Dentsply Sirona Inc. Passive fit of implant bridges and implant bars by means of a CAD/CAM tool for the model-free creation of implant-supported restorations
CN105030350A (zh) * 2015-04-27 2015-11-11 苏州光影口腔医疗科技有限公司 一种基于3d打印的植牙快速成型系统及方法
GR1009203B (el) * 2016-08-08 2018-01-23 Φοιβος Κυριακου Ψαρομματης-Γιαννακοπουλος Μεθοδολογια και διαταξη για την παραγωγη εξατομικευμενων οδοντιατρικων εμφυτευματων στον χωρο της επεμβασης

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Publication number Publication date
SE1350114A1 (sv) 2014-08-01

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