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WO1999052467A1 - Fabrication d'elements de restauration des dents tels que des bridges tout en ceramique et materiau pour un tel procede - Google Patents

Fabrication d'elements de restauration des dents tels que des bridges tout en ceramique et materiau pour un tel procede Download PDF

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Publication number
WO1999052467A1
WO1999052467A1 PCT/DK1998/000129 DK9800129W WO9952467A1 WO 1999052467 A1 WO1999052467 A1 WO 1999052467A1 DK 9800129 W DK9800129 W DK 9800129W WO 9952467 A1 WO9952467 A1 WO 9952467A1
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WO
WIPO (PCT)
Prior art keywords
substructure
bridge
fact
oxide
thereafter
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/DK1998/000129
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Danish (da)
English (en)
Inventor
Dirk Leonhardt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/DK1998/000129 priority Critical patent/WO1999052467A1/fr
Priority to AU63935/98A priority patent/AU6393598A/en
Publication of WO1999052467A1 publication Critical patent/WO1999052467A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • A61C13/0835—Ceramic coating on metallic body
    • 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
    • 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

Definitions

  • the present invention relates to a method for the fabrication of tooth restorations in the form of all ceramic bridges, which are shaped as a beam, which at each end are supportet by a bridge pillar in the form of a countoured tooth or a surgically inserted metalpin, a so called implant, by the use of a master die made from plaster or metal, of each bridge pillar, which may be mounted in a correct reciprocal position, which bridge consists of a substructure of aluminaoxide and an infiltration material of glass or more layers of glass ceramic,
  • a plaster model is first made from an impression.
  • the model receives a coat of spacer lacquer and a support is built by the use of modelling wax at the connecting linksection, which hereby will act as a support during the later application of the oxide ceramic.
  • a duplicating mould of silicone material is made, which, after the tensions in the silicone mould have been equalized, is cast in special plaster.
  • the new special plaster model is removed from the mould and is glued at the bottom to a fine sintered aluminaoxide plate, and the individual sections of the model, dies and the interconnecting linksection, are separated by sawing the plaster model.
  • a substructure material which contains oxide ceramic, which is applied to the plaster model with a brush, the model is heated to 1120 °C for 8 1/2 hours. After cooling the substructure is removed from the special plaster, and the fit of the substructure is checked on the first plaster model.
  • glass material is applied to the substructure, which then is sintered in a special furnace at 1100 °C for 6 1 / 2 hours. After cooling the surplus glass is removed, and an extra coat of glass ceramic is applied.
  • This known method is very elaborate, technique sensitive and time consuming and hence espensive to use. Since casting on metal cannot be done, this method can not be used for tooth restorations directiy based on implants.
  • Claim 2 deals with a preferred temperature and time for the dry-sintering.
  • Claim 3 deals with a preferred temperature and time for the infiltration sintering.
  • Claim 4 relates to a preferred composition of a separation material according to the invention.
  • Claim 5 relates to a preferred mixing ratio of the components in a separation material according to the invention.
  • Claim 6 relates to a preferred composition of a substructure material according to the invention.
  • Claim 7 relates to a preferred method of production and the mix proportion of the components in a substructure material according to the invention.
  • Claim 8 relates to a first form for oxide ceramic to be used in a substructure material according to the invention.
  • Claim 9 relates to another form of oxide ceramic to be used in a substructure material according to the invention.
  • Claim 10 relates to a third form of oxide ceramic to be used in a substructure material according to the invention.
  • Claim 11 relates to a fourth form of oxide ceramic to be used in a substructure material according to the invention.
  • fig. 1 shows an exploded work model for the use in the method as per the invention, with a number of master dies of plaster with impressions of ground teeth,
  • fig. 2 shows a picture similar to that in fig. 1 , with plate-like pieces cut from an aluminaoxide block, positioned in the space between the impressions of the three ground teeth,
  • fig. 3 shows a master die of plaster with the impression of a ground tooth, on which a coat of spacer material and separation material have been applied,
  • fig. 4 shows a picture similar to that in fig. 3, in which a coat of substructure material has been added,
  • fig. 5 shows a picture similar to that in fig. 2, in which a coat of spacer material, separation material and a coat of substructure material have been applied to each of the ground teeth, and where plate-like pieces of aluminoxide subsequently are positioned in the spaces between the teeth, and the transitions between the teeth and the plate-like pieces are covered by substructure material,
  • fig. 6 shows a finished bridge element, which has been removed from the work model - fig. 5 - after sintering
  • fig. 7 shows a picture similar to that in fig. 1 with master dies of plaster with impressions of metal pins/implants
  • fig. 8 shows a picture similar to that in fig. 7 with a plate-like piece from the work aluminaoxide block, positioned in the space between the implant-impressions,
  • fig. 9 shows a picture similar to that in fig. 8, in which a coat of spacer material, separation material and a coat of substructure material have been applied to the implant impressions, and where plate-like pieces of aluminoxide - 4 -
  • fig. 10 shows a finished bridge element after finished sintering.
  • a number of master dies 8 are mounted in a correct reciprocal position in a holder 2, with which they constitute a work model 1.
  • the impressions of the ground teeth or implants constitute bridge pillars for the bridge construction to be modelled as per the invention.
  • a bridge is to be modelled between teeth 3 and 5 with tooth 4 as an interval support.
  • the bridge pillars can, as shown in fig. 7, also be metal pins, which have been inserted in a jaw bone, so-called implants 7.
  • a plate 6 and/or 6' is adapted, which has been cut from an aluminaoxide block in such a way that the plate 6 or 6' fit precisely in the space between the bridge pillars 3,4 and 4,5 respectively or 7,7 on the work models 1 and 1', fig. 1 and fig. 7.
  • the aluminaoxide plate 6 is further reduced to a plate which has the interlink shape characteristic for all ceramic bridge constructions.
  • the plate 6 is soaked with demineralized water and kept moist, i.e. by staying in contact with water droplets, for later use.
  • the work model 1 and 1' consist of a number of master dies 8, which are mounted in a holder 2.
  • the master dies are applied a coat of spacer material 9, which can consist of modeling/spacer wax and subsequently a coat of separation material 10, which advantageously can consist of completely combustable modelling wax and chloroform in such a mixture that the material is liquid and brushable at 22 °C, but will harden at 20 °C .
  • spacer material 9 can consist of modeling/spacer wax and subsequently a coat of separation material 10 which advantageously can consist of completely combustable modelling wax and chloroform in such a mixture that the material is liquid and brushable at 22 °C, but will harden at 20 °C .
  • alumina powder is mixed with a special liquid by the aid of ultrasound into a paste or substructure material 11 , which is applied to the master dies 8, as shown in fig. 4, by using a suitable modelling instrument.
  • the substructure material 11 can consist of demineralised water, cellulose powder, sugar and an oxide ceramic, and it can be produced by first making a liquid, with a mixing ratio of 75 ml demineralised water to which is added 0,5 g cellulose derivative and stirring it for approx. one minute, whereafter the mixture is passed through a chemical paper filter and adding 1.5 g sugar, whereafter 1,36 ml of this liquid is mixed with 10 g of oxide ceramic.
  • an oxide ceramic can be used either aluminum oxide, zirconium oxide, magnesium oxide, a mixture af aluminum oxide and zirconium oxide, a mixture of magnesium oxide and zirconium oxide, or a mixture of aluminium oxide and magnesium oxide.
  • the separation material 10 prevents the substructure material 11 from drying out during the process of application onto the master die. At the same time the separation material 11 diffunds into both the plaster in the master die and into the substructure material 11 during the dryingprocess, so that the substructure material after the drying process is easy to remove from the master die as an independent substructure unit without damage to the master die.
  • the master dies 8, with the applied substructure material 11 - alumina oxide - are put back in the work model 1 and kept moist, i.e. by staying in contact with water droplets.
  • the plate pieces 6 are thereafter carefully positioned between the bridge pillars 3, 4, 5 or 7, and by adding small vibrations the plate pieces 6 are guided to their final position.
  • the transition areas between the plate pieces 6 and the bridge pillars 3, 4, 5 or 7 are covered and smoothed out, as shown in fig. 5 and 9, with substructure material 11.
  • the work model is hereafter pre-dried in a drying oven at approx. 50 °C for approx. 15 minutes. After pre-drying the work model is placed underneath the muffle of a porcelain furnace, and is heated by the furnace's heat radiation, so that the spacer material 9 melts.
  • the separating material will at the same time dissipate into both the plaster of the master die and the substructure material 11.
  • the bridge element 12 can be removed without damage to the master die, by turning the model and carefully tap the upper part of the holder 2.
  • the finished modelled bridge element 12 is sintered in a porcelain furnace at 1120 °C for approx. 2 hours. During the firing the wax, the binding material and the aluminaoxide material are sintered trough a so-called dry-sintering. Hereafter the sintered bridge element 12 is checked on the work model 1, and the fit is adjusted further by means of suitable grinding tools.
  • infiltration glass is applied to the surface of the bridge element 12, and the bridge element is fired by a so-called infiltration sintering, which preferably takes place at 1140 °C for approx. 40 minutes. After final firing possible excess glass is removed from the finished bridge element.
  • the spacer material 9, the separating material 10 and the substructure material 11 also may be used for fabrication of tooth restorations in the form of individual crowns.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ceramic Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Preparations (AREA)

Abstract

Le procédé de la présente invention consiste à prendre une maquette de travail (1) constituée d'un support (2) dans lequel sont placés des moulages maîtres (8) portant l'empreinte des dents meulées (3, 4, 5) voire des implants (7) sur lesquels ou entre lesquels on doit modeler un bridge en céramique et où les dents (3, 4, 5) voire les implants (7) sont montés en respectant des distances d'écartement appropriées. Le procédé consiste alors à utiliser une plaquette (6 et/ou 6') découpée dans un bloc d'alumine et à l'adapter aux espaces entre les dents. On applique sur la dent une couche de matériau intercalaire (9), en l'occurrence de la cire, puis une couche de matériau d'infrastructure souple (11) tiré de l'alumine. On prend alors la plaquette (6) que l'on place entre les deux dents et que l'on amène en position définitive par vibration. Il en résulte que les zones de transition entre la plaquette et les dents adjacentes se recouvrent d'une couche lisse de matériau d'infrastructure (11). On réalise alors un séchage préalable de la maquette de travail à une température d'environ 50 °C pendant environ 15 minutes. On expose alors la maquette de travail à un rayonnement thermique ce que fait que le matériau intercalaire (9) fond et qu'il est possible d'ôter le bridge de la maquette de travail. On soumet alors le bridge (12) à un frittage à sec et on fait refroidir la couche de glaçure de verre appliquée sur la surface. Il se produit alors un frittage par infiltration. Ce procédé qui est rapide et partant bon marché permet notamment de modeler des bridges sur des piliers de métal, c'est-à-dire des implants.
PCT/DK1998/000129 1998-03-27 1998-03-27 Fabrication d'elements de restauration des dents tels que des bridges tout en ceramique et materiau pour un tel procede Ceased WO1999052467A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/DK1998/000129 WO1999052467A1 (fr) 1998-03-27 1998-03-27 Fabrication d'elements de restauration des dents tels que des bridges tout en ceramique et materiau pour un tel procede
AU63935/98A AU6393598A (en) 1998-03-27 1998-03-27 Method for the fabrication of tooth restaurations in the form of all ceramic bridges and material for carrying out the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DK1998/000129 WO1999052467A1 (fr) 1998-03-27 1998-03-27 Fabrication d'elements de restauration des dents tels que des bridges tout en ceramique et materiau pour un tel procede

Publications (1)

Publication Number Publication Date
WO1999052467A1 true WO1999052467A1 (fr) 1999-10-21

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PCT/DK1998/000129 Ceased WO1999052467A1 (fr) 1998-03-27 1998-03-27 Fabrication d'elements de restauration des dents tels que des bridges tout en ceramique et materiau pour un tel procede

Country Status (2)

Country Link
AU (1) AU6393598A (fr)
WO (1) WO1999052467A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076321A3 (fr) * 2001-03-26 2003-01-09 Wieland Dental & Technik Gmbh Procede de production de pieces moulees dentaires en ceramique pleine a deux elements ou a elements multiples et dispositif approprie
WO2005070322A1 (fr) * 2004-01-27 2005-08-04 Ivoclar Vivadent Ag Materiau composite anorganique-anorganique et procede de fabrication
RU2437634C1 (ru) * 2010-09-08 2011-12-27 Владимир Анатольевич Молочков Способ изготовления керамического протеза
CN101647730B (zh) * 2009-07-08 2012-07-25 上海上远齿科技术有限公司 一种二氧化锆全瓷牙及其制备方法
WO2012148298A1 (fr) * 2011-04-27 2012-11-01 Molochkov Vladimir Anatolyevich Procédé de fabrication de prothèse céramique
WO2018172544A1 (fr) 2017-03-23 2018-09-27 Ivoclar Vivadent Ag Procédé de production d'un corps en céramique vitré
CN112759422A (zh) * 2021-02-01 2021-05-07 云南省第一人民医院 一种制备具有高结合力界面的牙科氧化锆-饰面瓷的方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995035070A1 (fr) * 1994-06-20 1995-12-28 Leonhardt Dirk Procede de production de restaurations dentaires ceramiques et de materiaux d'ecartement, de separation et d'infrastructure associes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995035070A1 (fr) * 1994-06-20 1995-12-28 Leonhardt Dirk Procede de production de restaurations dentaires ceramiques et de materiaux d'ecartement, de separation et d'infrastructure associes

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076321A3 (fr) * 2001-03-26 2003-01-09 Wieland Dental & Technik Gmbh Procede de production de pieces moulees dentaires en ceramique pleine a deux elements ou a elements multiples et dispositif approprie
WO2005070322A1 (fr) * 2004-01-27 2005-08-04 Ivoclar Vivadent Ag Materiau composite anorganique-anorganique et procede de fabrication
US8080189B2 (en) 2004-01-27 2011-12-20 Ivoclar Vivadent Ag Inorganic-inorganic composite material and method for producing the same
US9090511B2 (en) 2004-01-27 2015-07-28 Ivoclar Vivadent Ag Inorganic-inorganic composite material and method for producing the same
CN101647730B (zh) * 2009-07-08 2012-07-25 上海上远齿科技术有限公司 一种二氧化锆全瓷牙及其制备方法
RU2437634C1 (ru) * 2010-09-08 2011-12-27 Владимир Анатольевич Молочков Способ изготовления керамического протеза
WO2012148298A1 (fr) * 2011-04-27 2012-11-01 Molochkov Vladimir Anatolyevich Procédé de fabrication de prothèse céramique
WO2018172544A1 (fr) 2017-03-23 2018-09-27 Ivoclar Vivadent Ag Procédé de production d'un corps en céramique vitré
US11254618B2 (en) 2017-03-23 2022-02-22 Ivoclar Vivadent Ag Process for producing a glazed ceramic body
EP4470995A1 (fr) 2017-03-23 2024-12-04 Ivoclar Vivadent AG Procédé de fabrication d'un corps céramique émaillé
CN112759422A (zh) * 2021-02-01 2021-05-07 云南省第一人民医院 一种制备具有高结合力界面的牙科氧化锆-饰面瓷的方法

Also Published As

Publication number Publication date
AU6393598A (en) 1999-11-01

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