WO2006025778A1 - Procede et agencement pour la production d'une structure de pont a partir d'une ebauche en ceramique - Google Patents

Procede et agencement pour la production d'une structure de pont a partir d'une ebauche en ceramique Download PDF

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Publication number
WO2006025778A1
WO2006025778A1 PCT/SE2005/001202 SE2005001202W WO2006025778A1 WO 2006025778 A1 WO2006025778 A1 WO 2006025778A1 SE 2005001202 W SE2005001202 W SE 2005001202W WO 2006025778 A1 WO2006025778 A1 WO 2006025778A1
Authority
WO
WIPO (PCT)
Prior art keywords
bridge structure
blank
sections
presintered
arrangement
Prior art date
Application number
PCT/SE2005/001202
Other languages
English (en)
Inventor
Lars Jörneus
Original Assignee
Nobel Biocare Services 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 Nobel Biocare Services Ag filed Critical Nobel Biocare Services Ag
Publication of WO2006025778A1 publication Critical patent/WO2006025778A1/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
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
    • 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
    • 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
    • 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 present invention relates to a method for producing a bridge structure with or for tooth-simulating parts from a ceramic blank body.
  • An outer shape of the bridge structure is milled or formed in the body, together with sections retaining the bridge structure in the blank.
  • the invention also relates to an arrangement at or for a bridge structure intended or provided for tooth-simulating parts of ceramic presintered material.
  • the bridge structure will be able to be provided with recesses for tooth remnants on which the bridge structure is to be applied.
  • the bridge structure can be formed with outer parts which are applied to the tooth remnants and are to be machined, for example by milling, electroerosion, etc.
  • the bridge structure comprises tooth simulations. It has been proposed that the bridge structure must assume a hard- sintered state during the machining, which imposes strict machining requirements, among other things from the point of view of time. There is also a need for the machining to be able to be performed with less specialized tools, for example drills, and with faster processing times.
  • the object of the invention is to solve this- problem among others. In accordance with the concept of the.
  • the machining of the bridge structure will be able to be performed with the ceramic material in a semi-sintered state.
  • further measures are needed to be able to maintain the manufacturing precision, for example of 0.1 - 0.5 mm.
  • the invention solves this problem too.
  • the invention solves this-problem too.
  • the feature which can principally be regarded as characterizing a method according to the invention is, inter alia, that the presintered bridge structure is released from the blank via the aforementioned sections and is placed in a machining arrangement with a support for the respective bridge structure part and/or tooth- simulating part, and that the bridge structure thus released and supported is machined in the presintered state.
  • the tooth-simulating parts and/or bridge structure parts and/or ' blank are supported against one or more bearing surfaces included or used in or at the machining arrangement.
  • The, central parts of the 'bridge structure and/or parts of the blank are in this way prevented from downward or upward bending tendencies of the parts of the bridge structure when the bridge structure and/or the blank are exposed to actuating forces during the machining.
  • the sections are formed with material recesses or break markings at which the bridge structure is removed from the blank in its presintered state.
  • the presintered bridge structure can be anchored to the blank only via a small number of sections, for example two sections.
  • the blank body can be configured with a rod shape, and the bridge structure and the sections are milled with the aid of a milling tool which is applied in a single direction toward one side of the rod.
  • the break markings can be arranged in close proximity to the bridge structure.
  • the feature which can be regarded as principally characterizing an arrangement according to the invention is that the bridge -structure in its presintered state can be retained in a first stage in the blank by means of retaining sections which extend between the blank and the bridge structure. The latter can be removed from the blank by cutting-off of the sections.
  • the bridge structure in its presintered state can also be placed in a machining arrangement which supports the bridge structure and/or tooth-simulating parts during machining.
  • the bridge structure is assigned a manufacturing precision in the range of 0.1 - 0.5 mm despite the production being carried out in the ceramic material's presintered state. Further characteristics of the arrangement will become evident from the attached dependent claims.
  • the bridge structure can be produced and machined with the desired precision despite the ceramic material assuming only a presintered state.
  • Figure 1 shows a side view of a blank and, profiled in the latter, a bridge structure which is retained in the blank by means of retaining sections,
  • Figure 2 shows a side view of a rod-shaped, blank
  • Figure 3 shows an end view of the rod-shaped blank according to Figure 2
  • Figure 4 shows the bridge structure removed from the blank and mounted on a bearing surface
  • Figure 5 shows, in a ' vertical cross section, the configuration of a retaining section.
  • a rod-shaped blank 1 is shown from the side in Figure 1.
  • a bridge structure 2 Profiled in the blank, for example by milling at right angles to the plane of the paper, there is, on the one hand, a bridge structure 2 and, on the other hand, retaining sections 3 which in a first stage retain the bridge structure in the blank.
  • the number of sections may vary, for example between 2 and 6, preference being given to selecting a small number of sections, for example two, even though Figure 1 shows a greater number.
  • the blank, the bridge structure and the sections are made of a ceramic material, for example zirconium oxide.
  • the ceramic material assumes a presintered state, meaning that it has been sintered in a heating furnace at 800 0 C for 1 - 2 hours. Such presintering means that the original powder composition shrinks by ca. 30%.
  • the milling groove in such presintered material is shown by reference number 4 in Figure 1 and can be produced by a milling tool in a relatively short time, for example a 50% shorter time, and exposes the milling tool to much less wear, for example 75% less wear.
  • the bridge structure comprises a central part 2a and two outer parts 2b and 2c, and web parts 2d and 2e joining the parts 2a-2c together.
  • the blank 1 is mounted on a first bearing surface 5 before the milling takes place.
  • the support and securing/clamping against the flat bearing surface 5 means that the rod is not bent downward or affected by the forces which the machining in question generates.
  • the supporting surface or flat surface 5 is in the present case arranged at right angles to the machining direction, which is shown by the arrow 7 for a tool 6.
  • the rod-shaped ceramic and presintered material is shown from one end in Figure 3.
  • the sintering process, the milling process and the tool used can be of any type known per se and will therefore not be described in detail here.
  • a machining arrangement is indicated symbolically by reference number 8.
  • Figure 4 shows the bridge structure from one end . and released from the blank by cutting-off of said sections 3.
  • the bridge structure can be placed on a support surface in said machining arrangement or in another machining arrangement 8' .
  • the support surface 9 can consist of another support surface or, in an alternative embodiment, can be formed by . the first support surface 5.
  • the bridge structure 2a - 2e can be machined, for example, by electroerosion of a type known per se.
  • the anode of the latter equipment has been designated by 10 in Figure 4, and the direction of action of the anode on the bridge structure has been indicated by 11.
  • the bridge structure is clamped and forced downward toward the surface 9 in Figure 4.
  • the clamping member which cooperates with the top face of the bridge structure is indicated symbolically by reference number 12, and its direction of action on the bridge structure is indicated by reference number 13.
  • the bridge structure is provided with cooperating parts 14, 15, 16, 17 and 18 which cooperate with the support surface 9. Forces F which attack the bridge structure during the machining cannot therefore cause any downward or upward bending tendencies in parts of the bridge structure.
  • the corresponding force for the milling tool 6 in Figure 2 has been indicated by F' .
  • Figure 5 shows a . section 3 in detail.
  • the section has a thickness t and a height H corresponding to the width of the groove 4.
  • the thickness t of the section is chosen as a function of the number of sections and/or the positions of the sections.
  • the section or the sections can be • provided with one or more break markings 19 which facilitate cutting of the section 3 when the bridge structure is removed from the blank.
  • the break marking is placed a short distance L from the bridge structure 2a. This positioning of the break marking means that a remaining part 3a is easily removable upon finishing of the bridge structure, which can be hard-sintered at the finish.
  • a cutting tool is indicated symbolically by 20 and the direction of the cutting tool during cutting of the section 3 in Figure 5 is shown by 21.
  • the tooth simulation in question has a support part that can cooperate with the support surface 9.
  • the reference number 21 designates a grinding or polishing tool, and the arrows 22 and 23 indicate directions of movement for this tool.
  • F'' represents actuating forces for these machining functions.

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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

La présente invention a trait à un procédé pour la production d'une structure de pont avec ou pour des parties de simulation dentaire à partir d'une ébauche en céramique, dans lequel une forme extérieure de la structure de pont est fraisée avec des sections de retenue de la structure de pont dans l'ébauche. La structure de pont préalablement frittée est libérée de l'ébauche par les sections et est placée dans un agencement d'usinage avec un support pour la partie de structure de pont et/ou la partie de simulation dentaire respective. La structure de pont ainsi libérée et supportée est ensuite usinée dans l'état de structure préalablement frittée. L'invention a également trait à un agencement pour une structure de pont prévue ou destinée pour des parties de simulation dentaire et réalisée en un matériau céramique préalablement frittée. Grâce à l'invention, l'usinage peut être effectué sur un matériau relativement plus souple, qui exerce moins de contraintes sur l'usinage et entraîne son accélération.
PCT/SE2005/001202 2004-09-01 2005-08-11 Procede et agencement pour la production d'une structure de pont a partir d'une ebauche en ceramique WO2006025778A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402110-1 2004-09-01
SE0402110A SE0402110L (sv) 2004-09-01 2004-09-01 Förfarande och anordning vid framställning av brostruktur ur keramisk ämneskropp-

Publications (1)

Publication Number Publication Date
WO2006025778A1 true WO2006025778A1 (fr) 2006-03-09

Family

ID=33096061

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/001202 WO2006025778A1 (fr) 2004-09-01 2005-08-11 Procede et agencement pour la production d'une structure de pont a partir d'une ebauche en ceramique

Country Status (2)

Country Link
SE (1) SE0402110L (fr)
WO (1) WO2006025778A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008148495A1 (fr) * 2007-06-07 2008-12-11 Nobel Biocare Services Ag Procédé et dispositif de fabrication d'un bridge
DE102009044460B3 (de) * 2009-11-06 2011-07-14 DeguDent GmbH, 63457 Verfahren zum Heraustrennen eines Formlings aus einem Rohling
US8231825B2 (en) 2007-06-07 2012-07-31 Nobel Biocare Services Ag Method of producing a dental product
EP2147904A3 (fr) * 2008-07-18 2014-12-10 DeguDent GmbH Procédé de sertissage dimensionnel d'une pièce de formage
EP2637598B1 (fr) 2010-11-10 2017-07-19 Heraeus Kulzer GmbH Bridges et superstructures dentaires, et procédés pour fabriquer ceux-ci

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092022A (en) * 1982-11-30 1992-03-03 Francois Duret Method of producing a dental prosthesis
US6599125B1 (en) * 1999-08-27 2003-07-29 University Of Connecticut Prefabricated components for dental appliances

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092022A (en) * 1982-11-30 1992-03-03 Francois Duret Method of producing a dental prosthesis
US6599125B1 (en) * 1999-08-27 2003-07-29 University Of Connecticut Prefabricated components for dental appliances

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008148495A1 (fr) * 2007-06-07 2008-12-11 Nobel Biocare Services Ag Procédé et dispositif de fabrication d'un bridge
EP2014254A1 (fr) 2007-06-07 2009-01-14 Nobel Biocare Services AG Procédé et agencement pour former un bridge
US8231825B2 (en) 2007-06-07 2012-07-31 Nobel Biocare Services Ag Method of producing a dental product
US9561090B2 (en) 2007-06-07 2017-02-07 Nobel Biocare Services Ag Method of producing a dental product
US10449020B2 (en) 2007-06-07 2019-10-22 Nobel Biocare Services Ag Method and arrangement for forming a dental bridge
EP2147904A3 (fr) * 2008-07-18 2014-12-10 DeguDent GmbH Procédé de sertissage dimensionnel d'une pièce de formage
DE102009044460B3 (de) * 2009-11-06 2011-07-14 DeguDent GmbH, 63457 Verfahren zum Heraustrennen eines Formlings aus einem Rohling
EP2637598B1 (fr) 2010-11-10 2017-07-19 Heraeus Kulzer GmbH Bridges et superstructures dentaires, et procédés pour fabriquer ceux-ci

Also Published As

Publication number Publication date
SE0402110L (sv) 2006-03-02
SE0402110D0 (sv) 2004-09-01

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