EP2934370A1 - Procédé et agencement pour revêtir des couronnes et bridges et support de cuisson pour ceux-ci - Google Patents

Procédé et agencement pour revêtir des couronnes et bridges et support de cuisson pour ceux-ci

Info

Publication number
EP2934370A1
EP2934370A1 EP13737793.3A EP13737793A EP2934370A1 EP 2934370 A1 EP2934370 A1 EP 2934370A1 EP 13737793 A EP13737793 A EP 13737793A EP 2934370 A1 EP2934370 A1 EP 2934370A1
Authority
EP
European Patent Office
Prior art keywords
metal plate
firing
bridges
kiln
crowns
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Withdrawn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
EP13737793.3A
Other languages
German (de)
English (en)
Inventor
Claudia Petroll
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.)
Selection - Dental GmbH
Original Assignee
Selection - Dental 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 Selection - Dental GmbH filed Critical Selection - Dental GmbH
Publication of EP2934370A1 publication Critical patent/EP2934370A1/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Withdrawn legal-status Critical Current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
    • A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
    • 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
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
    • F27B17/025—Furnaces of a kind not covered by any preceding group specially designed for laboratory use for dental workpieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0043—Supports specially adapted for dental prosthesis

Definitions

  • the invention relates to a method for veneering of dental alloys, zirconium and / or ceramic materials existing crowns and bridges with ceramic materials in a kiln and an arrangement therefor, comprising a kiln and a Brenngutieri- metal plate and at least one retaining pin made of metal, wherein the retaining pin is provided for holding the crowns and bridges to be veneered. Furthermore, the invention relates to a firing tray for it.
  • the metallic dental alloys, zirconium and / or ceramic materials are also hereafter
  • dental materials in summary, called dental materials from which the dental workpieces, especially crowns and bridges are made.
  • Ceramic compounds is applied to the dentures scaffold in a suitable way
  • Nano-ceramic a broader particle size distribution, resulting in a coarser and therefore for expelled constituents, such as water vapor, much more permeable mass adjusted.
  • the crowns and bridges made of dental materials for porcelain veneering are prepared so that they are placed on a firing tray, which is designed in the form of a ceramic honeycomb plate.
  • plug-in retaining pins are provided in the ceramic honeycomb plate, which are fixed against slipping by insertion into the honeycomb plate and on its upper side, for example, tapered cylindrical shape or hook shape, so that on the prepared crowns and / or bridges can be securely supported.
  • These retaining pins are made of metal or ceramic.
  • DE 103 25 524 A1 shows a firing tray for dental ceramic dentures made of metal.
  • the support plate has a hole pattern in the correspondingly shaped retaining pins can be inserted for the crowns / bridges to be machined.
  • DE 1 963 886 U also shows a metallic firing tray, which is equipped with insertion holes for corresponding retaining pins.
  • the retaining pins have so-called support collars, so that the pins occupy a defined depth of penetration into the insertion holes provided in the firing tray.
  • US Pat. No. 4,184,840 shows a retaining pin for dental ceramic prostheses, which has the shape of a conical mandrel. Again, the retaining pins are inserted in provided in the firing tray holes.
  • No. 3,861,867 A shows a firing tray made of a heat-resistant alloy, with receiving openings, here with therein
  • the plug-in or screw-in retaining pins may have different shape, for example, conical shape.
  • For a ceramic coating is on the off the dental material
  • the object of the invention is to provide a method and an arrangement of the type described with a kiln and a firing tray for it, with a ceramic facing faster, less prone to damage and thus in always repeatable good quality is possible. This object is achieved by a method according to claim 1.
  • the object is achieved with an arrangement according to claim 6 or a firing tray according to claim 12.
  • Thermal radiation causes a drying out of the ceramic material applied with the carrier liquid from the outside to the inside, which leads to errors in the ceramic firing at too fast heating time, too thick order and / or other deviations from the ideal parameters.
  • Heat absorption capacity of the Brenngutieri-metal plate and subsequent heat conduction over the retaining pins to the dental crown created from the dental material and bridges uniform drying of the ceramic material can be achieved from the inside out.
  • frog eyes Heating via heat conduction from the inside to the outside does not cause blisters (frog eyes). These frog eyes are likely to occur when drying the ceramic in the previous process whenever the ceramic dries faster from the outside, as the inside evaporates the carrier liquid, in particular the water content. Accordingly, it is believed that the frog eyes hydrothermal vents are those modified by the invention
  • the retaining pins can be positioned anywhere on the Brennguta metal plate by simply setting up. Nevertheless, should be different during the firing process thermal expansions of the
  • Compensate for thermal expansion differences This is an excessive stress on the support pins placed dental workpiece (framework) and thus the risk of distortion, for example, on large-span bridges, the subsequent adjustment in the patient or even a
  • the Brennguty-metal plate is an integral part of the kiln, this can be heated by heat conduction in the kiln, but the placement of the Brennguty metal plate must be done with the crowns and bridges to be coated on the open kiln. If the Brenngutieri-metal plate is formed actively heated, the heating of the Brennguty-metal plate in the kiln, for example, can be supported inductively active, so that the heating time further reduced and provided by heat transfer heat input from the inside can be further increased in the dentures. For example, the Brenngutieri-metal plate is heated electrically in the kiln.
  • an actively heatable Brenngutieri-metal plate can be made removable from the kiln, for example, if it contains an electric heating wire, which is contacted via electrical contacts during insertion of the Brenngutieri-metal plate in the kiln.
  • the retaining pin has a mandrel, which is raised when used properly from the firing tray metal plate, for holding the crowns and bridges, a secure and substantially stress-free retention of the dental pieces is achieved.
  • the mandrel has a concave tapering towards the top
  • Truncated cone shape to reliably avoid unwanted distortion of the mandrel in the crown or bridge.
  • the crown or bridge should rest only on the mandrel, but have the largest possible contact surface for good heat conduction.
  • the firing metal plate is due to heat radiation due to its high mass faster than the ceramic material is heated in the kiln, the heat is dissipated via heat conduction evenly over the retaining pins to the bridge or crown.
  • the Brenngutieri- metal plate introduced into the kiln total mass according to the predetermined density is sufficiently large to absorb thermal energy transmitted by heat radiation and to forward to the crowns or bridges can.
  • the fuel tray metal plate does not absorb too much heat when introduced into the kiln, so that the firing process can still be carried out economically. Possibly.
  • the massive firing tray can also be introduced preheated in the kiln.
  • the fuel tray metal plate In order to achieve the lowest possible release of ions from the fuel tray metal plate, it consists of a metal alloy with one or more of the following elements cobalt, chromium, molybdenum, manganese, tin, gallium, indium, silicon, tungsten, gold and / or platinum. In particular, the material must be free of arsenic and sulfur. If the firing metal plate and / or the retaining pins with an intermetallic-ceramic glass phase (such as
  • Fig. 1 shows an inventive arrangement in a partially sectioned view
  • Fig. 2 a firing tray according to the invention in a three-dimensional view.
  • a kiln 1 is shown.
  • the kiln 1 has a
  • cylindrical combustion chamber 1 1 which is shown in Fig. 1 cut.
  • heating elements 13 are arranged.
  • the combustion chamber 1 1 has an opening which is closed with a closure plate 12 during the firing process.
  • Kiln 1 is mounted on a console 15 for the kiln 1 liftable and lowered, as shown by arrow Z.
  • a console 15 for the kiln 1 liftable and lowered, as shown by arrow Z.
  • a closure plate 12 On the closure plate 12 is a
  • Burning base 14 arranged for example of fireclay, on the one
  • Firing tray 2 rests, which in turn carries with a ceramic veneer to be provided dental workpieces, namely crowns or bridges 3 with set up on the firing tray 2 retaining pins 21.
  • FIG. 2 shows, in a three-dimensional view, the firing tray 2 in the form of a flat cuboid firing metal plate 2.
  • the Brenngutieri- metal plate 2 is flat ground at its top and has a
  • the retaining pin 21 has a downwardly widening base 22, which is formed flat and level on its underside to a possible good thermal contact with the fuel tray metal plate 2, to achieve a secure footing on this and a displacement on the Brenngutmé metal plate 2.
  • Each retaining pin 21 has a mandrel 23 which rises in approximately cylindrical shape substantially normal from the surface of the Brenngutieri- metal plate 2.
  • the mandrel 23 may also be conical or hook-shaped for special applications.
  • the mandrel 23 has a truncated cone shape tapering concavely upward in order to avoid an undesirable distortion of the mandrel 23 in the crown or bridge 3. The crown or bridge 3 is thus only on the mandrel 23.
  • the stump of the truncated cone shape has the largest possible support and contact surface.
  • the mandrel 23 is eccentrically on the base 22 substantially normal to the flat surface of the Brennguta metal plate 2 above, so that two juxtaposed support pins 21 with their spikes 23 despite the larger feet 22 can be placed as close to each other.
  • the retaining pins 21 are placed on the Brenngutaji-metal plate 2 in the desired arrangement and placed on it to be veneered dental workpieces, crowns and bridges 3 in a conventional manner.
  • the distances between two or more thorns 23 of the retaining pins 21 can be arbitrarily moved by the simple placement on the flat surface of the Brenngutaki- metal plate 2 without regard to a grid, as in the known ceramic honeycomb panels.
  • Holding pins 21 are coated with the crowns or bridges 3, which are coated in the appropriate form with ceramic masses, the firing tray 2 is centered on the fuel base 14 of the kiln 1 and turned off the
  • the heating elements 13 of the kiln 1 are activated, so that the combustion chamber temperature, for example, with a heating rate of 200 to 250 ° C / min, increases.
  • the Brenngut approximately metal plate 2 takes due to the high density and determined by the plate size and thickness mass prevailing in the kiln 1 heat, especially by radiant heat quickly and gives them on the base 22 of the retaining pins 21 via the mandrel 23 to the resting thereon Crown or bridge 3 by heat conduction on.
  • the dental work piece (crown or bridge) from the outside through in the
  • Combustion chamber 1 1 prevailing heat radiation heated. Nevertheless, it has been shown that the amount of heat coupled via heat conduction from the fuel tray metal plate 2 into the dental workpiece held thereon is greater than the heat quantity supplied externally by heat radiation. Accordingly, the ceramic material spread over the dental workpiece dries from the inside to the outside, so that hydrothermal vents, which become visible in the form of frog eyes, are completely avoided. Likewise, stresses due to different thermal expansion or shrinkage are largely avoided.
  • Burning time savings of about 50% compared to conventional methods can be achieved.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Clinical Laboratory Science (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un procédé pour revêtir des couronnes et bridges (3) composés d'alliages dentaires métalliques, de zirconium et/ou autres matières céramiques, par des matières céramiques dans un four à cuire (1), caractérisé en ce que, pour chauffer les couronnes et les bridges (3) dans le four à cuire (1), les couronnes et les bridges (3) sont chauffés par contact conducteur de chaleur de l'intérieur. En outre, l'invention concerne un agencement pour revêtir des couronnes et bridges (3) composés d'alliages dentaires métalliques, de zirconium et/ou autres matières céramiques, par des matières céramiques, comprenant un four à cuire (1), une plaque métallique de support de cuisson (2) et au moins une goupille de retenue (21) en métal, la goupille de retenue (21) étant prévue pour maintenir les couronnes et bridges (3) à revêtir, caractérisé en ce que la plaque métallique de support de cuisson (2) est formée plate/fermée à sa face supérieure et la goupille de retenue (21) présente un support (22) ayant une face inférieure plate. L'invention concerne en outre une plaque métallique de support de cuisson (2) à cet effet.
EP13737793.3A 2012-12-20 2013-06-07 Procédé et agencement pour revêtir des couronnes et bridges et support de cuisson pour ceux-ci Withdrawn EP2934370A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201220104979 DE202012104979U1 (de) 2012-12-20 2012-12-20 Anordnung zum Verblenden von Kronen und Brücken sowie Brenngutträger dafür
PCT/DE2013/100205 WO2014094725A1 (fr) 2012-12-20 2013-06-07 Procédé et agencement pour revêtir des couronnes et bridges et support de cuisson pour ceux-ci

Publications (1)

Publication Number Publication Date
EP2934370A1 true EP2934370A1 (fr) 2015-10-28

Family

ID=47711265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13737793.3A Withdrawn EP2934370A1 (fr) 2012-12-20 2013-06-07 Procédé et agencement pour revêtir des couronnes et bridges et support de cuisson pour ceux-ci

Country Status (3)

Country Link
EP (1) EP2934370A1 (fr)
DE (1) DE202012104979U1 (fr)
WO (1) WO2014094725A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014101887U1 (de) 2014-04-22 2014-05-05 Selection Gmbh Brenngutträgerhalter
DE102014113148A1 (de) * 2014-09-12 2016-03-31 Amann Girrbach Ag Sinterrohling
DE102015112494B4 (de) * 2015-07-30 2018-04-12 Selection Gmbh - Dental - Verfahren und Anordnung zum Verblenden von Kronen und Brücken
CN106322983A (zh) * 2016-04-28 2017-01-11 郑州科佳电炉有限公司 一种义齿软质合金烧结炉

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1963886U (de) 1967-03-29 1967-07-13 Karl Dr Hintenberger Brennguttraeger fuer aufbrennarbeiten, insbesondere fuer zahnkeramische zwecke.
US3861867A (en) 1973-08-29 1975-01-21 Kenneth R Ouhl Tray for oven-firing porcelain dental bridges and like dental appliances
US4184840A (en) 1978-04-28 1980-01-22 Aida Gamberg Rotatable supporting structure
DE9217191U1 (de) * 1992-12-16 1993-04-01 Gebr. Kümmerle GmbH Präzisions-Feindrehteile, 7888 Rheinfelden Vorrichtung zum Fixieren von dentalkeramischen Verbindungen beim Brennen in Hochtemperaturöfen
DE9412732U1 (de) * 1994-08-06 1994-10-06 Shenpaz Industries Ltd., Tel Aviv Brenngutträger
US6252202B1 (en) * 1998-02-10 2001-06-26 Jeneric/Pentron, Inc. Furnace for heat treatment of dental materials
DE10022559B4 (de) 2000-05-10 2004-07-22 Petroll, Claudia Mittel zur haftfesten Verbindung von Dentalkeramiken mit Metallsubstraten
DE10325524B4 (de) 2002-10-18 2014-11-27 Klaus Fleischfresser Brenngutträger für dentalkermischen Zahnersatz
ES2528005T3 (es) * 2011-03-02 2015-02-03 Ivoclar Vivadent Ag Horno dental de cocción o de prensado

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014094725A1 *

Also Published As

Publication number Publication date
WO2014094725A1 (fr) 2014-06-26
DE202012104979U1 (de) 2013-01-11

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