EP1627088A1 - Gold alloy and method for manufacturing a dental restoration - Google Patents

Gold alloy and method for manufacturing a dental restoration

Info

Publication number
EP1627088A1
EP1627088A1 EP04748587A EP04748587A EP1627088A1 EP 1627088 A1 EP1627088 A1 EP 1627088A1 EP 04748587 A EP04748587 A EP 04748587A EP 04748587 A EP04748587 A EP 04748587A EP 1627088 A1 EP1627088 A1 EP 1627088A1
Authority
EP
European Patent Office
Prior art keywords
alloy
gold
porcelain
temperature
metal
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Withdrawn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
EP04748587A
Other languages
German (de)
English (en)
French (fr)
Inventor
Joseph Maria Van Der Zel
Theodorus Jacobus Grinwis
Bastiaan Philip Van Dijk
Adrianus Jacobus De Wit
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.)
Elephant Dental BV
Original Assignee
Elephant Dental BV
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 Elephant Dental BV filed Critical Elephant Dental BV
Publication of EP1627088A1 publication Critical patent/EP1627088A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/02—Alloys based on gold
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
    • A61K6/844—Noble metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
    • H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
    • H01L2224/45001—Core members of the connector
    • H01L2224/45099—Material
    • H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
    • H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
    • H01L2224/45144—Gold (Au) as principal constituent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/42—Wire connectors; Manufacturing methods related thereto
    • H01L24/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
    • H01L24/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01014—Silicon [Si]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01019—Potassium [K]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01046—Palladium [Pd]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/0105—Tin [Sn]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01077—Iridium [Ir]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01078—Platinum [Pt]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01079—Gold [Au]

Definitions

  • the invention relates to a gold alloy and more in particular to a gold alloy having a high gold content.
  • the invention further relates to a method for manufacturing a metal-ceramic dental restoration.
  • gold alloys with a high gold content have been used in dental restorations, particularly because of their biological and chemical inertia and their attractive deep yellow color.
  • This pressing procedure comprises the following steps: a supporting structure from a metal alloy is, either provided with a thin coating layer or not, pressed over with a press ceramic by use of the "lost wax method". During the burning out or drying out of the wax, while heating for a long time at a relatively high temperature, with many alloys, a thick oxide layer is formed on the alloy. In many cases, this oxide layer results in a dark edge or contour.
  • steps need to be taken to form as little oxide as possible on the surface of the structure from the metal alloy.
  • an alloy with a high gold content a so-called “high gold alloy” has now been found which remains yellow upon oxidation, which alloy is suitable for use in a metal -ceramic system, in which a gold alloy with an aesthetic yellow color is fired on or pressed on with a dental ceramic or porcelain tailored thereto.
  • the alloy according to the invention has a high degree of biocompatibility.
  • This alloy according to the invention comprises 0.01-0.05 wt.% zinc; 0.01-0.05 wt.% indium; 0.01-0.05 wt.% silver and 0.01-0.05 wt.% manganese in a gold base.
  • the gold base substantially consists of gold, but may contain small amounts of pollutants, as long as they produce no adverse color effects and do not affect the biocompatibility.
  • the alloy according to the invention comprises at least 99 wt.% gold.
  • a very suitable alloy substantially consists of 99.80 wt.% gold; 0.05 wt.% zinc; 0.05 wt.% indium; 0.05 wt.% silver and 0.05 wt.% manganese.
  • the alloy according to the invention provides a stable, very thin, possibly monomolecular oxidation layer which is so light in color than no adverse color effects occur.
  • the oxidation layer is sufficiently strongly bound to the underlying alloy and appears to be capable of a very good metal-press glass or metal-porcelain binding.
  • manganese provides a good bond.
  • Tin and indium ensure a reinforcement of the oxide.
  • the gold alloy according to the invention does not have a very great strength, but this has not been found necessary for the applications for which this alloy is intended.
  • the alloys according to the invention have a solidus temperature of between 1030 and 1100°C; for the preferred alloys, the solidus temperature is between 1045 and 1065°C.
  • the coefficient of thermal expansion (measured from 25 to 500°C) is between 14.5 and 15.5 ⁇ m/m.°C; and for the preferred alloys between 14.8 and 15.3 ⁇ m/m.°C.
  • DE-OS 44 19 408 describes a dental alloy with 95-98 wt.% gold; 1-4 wt.% titanium; and 0.05-1.5 wt.% of one or more elements from the group of Re, Rh, Ru, Ir and Ta.
  • US-A-5,922,276 relates to a dental alloy with an excellent oxide color, which alloy contains at least 99.5 wt.% gold, 0.1-0.25 wt.% zinc, 0.1-0.25 wt.% indium and up to 0.3 wt.% Rt, Pd, Rh, Ir, Re or combinations thereof. It is explicitly stated that elements like copper, manganese and iron should be avoided because they produce dark or colored oxides.
  • the invention relates to a method for manufacturing a metal-ceramic dental restoration, comprising pressing, with heating, a tooth-colored press glass onto a wholly or partly supporting structure from the alloy according to the invention, with the press glass having a coefficient of thermal expansion (CTE) of between 12.5 and 14.5, and preferably between 13.0 and 14.5 km/m.K, measured in the range from 25°C to 500°C or to the glass transformation temperature, depending on which of the two is the lowest, and with the press glass having a pressing temperature which is at least 50°C lower than the solidus temperature of the alloy.
  • CTE coefficient of thermal expansion
  • the press glass is pressed with heating in a mold manufactured by use of the "lost wax" method.
  • Such a method is much more effective and economical than the conventional method in which porcelain was applied layer by layer.
  • fewer bubbles and cracks are formed during pressing compared to applying the porcelain layer by layer.
  • the alloy according to the invention can also be coated with this conventional method.
  • a wax model of one or more teeth and/or molars is made, which model is embedded in a fire-resistant material, for instance Carrara ® Universal Dustless Investment (ex Elephant Dental B.V., Hoorn, The Netherlands). Then, after curing of the die from fire-resistant material, the wax is burnt out. After this, a closed pellet of press glass is brought, on the connecting channels, to the mold, by pressing the glass therein with a fire-resistant cylinder with thermal plasticization.
  • the structure from the high gold alloy according to the invention is present, as stated. This structure may, for instance, be formed by CAD/CAM methodologies.
  • the press glass is available in a tooth color.
  • the coloring of porcelain is known to a skilled person. A suitable method is described in DE-OS- 1999 04 522, which document is understood to be inserted in this specification for the description of the coloring method.
  • a so-called liner may be applied onto the alloy.
  • This liner will, as a rule, have a melting point which is less than 50°C lower than the pressing temperature of the press glass.
  • a suitable liner consists of 58.5 wt.% Si ⁇ , 12.6 wt.% AI2O3, 11.0 wt.% K 2 O, 7.1 wt.% Na 2 O, 10.4 wt.% CeO 2 , 0.4 wt.% LiO 2 .
  • This liner can be applied as a single coating in a thickness of 20-40 ⁇ m and be burnt up at about 900°C.
  • a suitable press glass may have the following (preferred) composition: 7-15 wt.% AI2O3; 13-23 wt.% (K 2 O + Na 2 O), 1-3 wt.% (BaO + CaO), 1-3 wt.% (Sb2 ⁇ 3 + LA2O) and 0.2-1.2 wt.% fluorine, rest Si ⁇ 2 including coloring compositions.
  • the powder formed from these glass compositions preferably has a particle size smaller than 106 ⁇ .
  • This powder is granulated with a binder and uniaxially dry -pressed at room temperature and sintered at a temperature of, for instance, 800-1000°C, preferably 900-960°C, for 1 minute to 1 hour, preferably 1-30 minutes.
  • the invention relates to a method for manufacturing a metal-ceramic dental restoration, comprising firing a dental porcelain onto a supporting structure from the alloy according to any one of claims 1-3, with the porcelain having a coefficient of thermal expansion of between 12.5 and 14.5 ⁇ m/m.K, measured in the range from 25°C to 500°C or to the glass transformation temperature, depending on which of the two is the lowest, and with the porcelain having a firing temperature which is at least 50 °C lower than the solidus temperature of the alloy.
  • a suitable firing ceramic has the following (preferred) composition: 64.1-67.0% Si ⁇ 2, 11.0-12.5% AI2O3, 10.1-11.6% K 2 O, 6.6-8.6% Na 2 O, 0.7-1.1% CaO, 0.4-1.3% BaO, 0-2.1% Sb2 ⁇ 3, 0-0.2% L12O, and 0-0.6% fluorine with pigments.
  • a more preferred firing ceramic has the following composition: 64.1% Si ⁇ 2, 14.2% AI2O3, 11.1% K 2 O, 6.6% Na O, 1.1% CaO, 0.4% BaO, 1.4% Sb 2 O 3 , 0.2% Li 2 O and 0.6% F2 with pigments.
  • Every CTE described in this specification or the claims is measured in the range from 25°C to 500°C or to the glass transformation temperature, depending on which of the two is the lowest. Also, every percentage is a weight percentage related to the weight of the total composition, unless indicated otherwise.
  • the pressing or firing temperature needs to be at least 50°C lower than the solidus temperature of the alloy in order to avoid deformation of the metal structure during pressing.
  • the CTE of the press glass or porcelain needs to be such that the CTE of the alloy is 0.5-2.0 ⁇ m/m.K higher than that of the press glass or porcelain.
  • the alloys were then cast in an electric casting device at 1200 °C into a graphite -containing, phosphate-bound embedding mass die, which had been preheated to 750°C. After oxidation, the alloy has a grey-yellow color.
  • the binding with porcelain is given in Table 3.
  • Example 2 In the same manner as in Example 1, an alloy was produced with the following composition: 98.2 wt.% gold, 1.2 wt.% platinum, 0.1 wt.% zinc,
  • Example 2 In the same manner as in Example 1, an alloy was produced with the following composition: 99.8 wt.% gold, 0.05% zinc, 0.05% indium, 0.05% silver, 0.05% manganese. After oxidation, the alloy has an intensely yellow color.
  • Example 3 In the same manner as in Example 1, an alloy was produced with the following composition: 99.7 wt.% gold, 0.1% zinc, 0.2% indium (see US-A-5,922,276). After oxidation, the alloy has an intensely yellow color, but did not have the good bond of Example 3.
  • a round disk of the alloys was cast with a diameter of 25 mm and a thickness of 1.0 mm. After casting, the casting pieces were ground with coarse and fine aluminum oxide. The metal-ceramic disk was then deformed from the top, with the porcelain downwards, by a stamp with a spherical end. The disk was bent 0.4 mm in the centre to achieve a consistent deformation of the disk and removal of the ceramic with minimal cracks in the metal. After the breaking off of the porcelain, loose particles of porcelain were removed from the surface of fracture with a nylon brush, after which the surface of fracture was placed in an ultrasonic bath for 10 minutes.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Metallurgy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Ceramic Engineering (AREA)
  • Dental Prosthetics (AREA)
  • Ceramic Products (AREA)
  • Dental Preparations (AREA)

Abstract

De onderhavige uitvinding heeft betrekking op een legering met een hoog goudgehalte. Deze legering omvat bij voorkeur meer dan 99 gew.% goud. Voorts betreft de uitvinding een werkwijze voor het vervaardigen van een metaal-keramische dentaalrestauratie door oppersen of opbakken van een geschikt porselein. De porseleinen die hierbij worden toegepast, hebben een bepaalde maximale verwerktemperatuur en een thermische uitzettingscoëfficiënt in een bepaald traject.
EP04748587A 2003-05-19 2004-05-18 Gold alloy and method for manufacturing a dental restoration Withdrawn EP1627088A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1023458A NL1023458C2 (nl) 2003-05-19 2003-05-19 Goudlegering alsmede een werkwijze voor het vervaardigen van een dentaalrestauratie.
PCT/NL2004/000344 WO2004101835A1 (en) 2003-05-19 2004-05-18 Gold alloy and method for manufacturing a dental restoration

Publications (1)

Publication Number Publication Date
EP1627088A1 true EP1627088A1 (en) 2006-02-22

Family

ID=33448527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04748587A Withdrawn EP1627088A1 (en) 2003-05-19 2004-05-18 Gold alloy and method for manufacturing a dental restoration

Country Status (8)

Country Link
EP (1) EP1627088A1 (nl)
JP (1) JP2007527955A (nl)
KR (1) KR20050118301A (nl)
CN (1) CN1777688A (nl)
BR (1) BRPI0408748A (nl)
CA (1) CA2520131A1 (nl)
NL (1) NL1023458C2 (nl)
WO (1) WO2004101835A1 (nl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7279054B2 (en) 2004-05-14 2007-10-09 The Argen Corporation Dental prosthesis method and alloys
CN104367383A (zh) * 2013-08-16 2015-02-25 刘俐旻 含有纳米金的瓷牙结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2922226B2 (ja) * 1989-10-16 1999-07-19 株式会社徳力本店 装飾用白色金合金
NL9200564A (nl) * 1992-03-26 1993-10-18 Elephant Edelmetaal Bv Dentaallegering en dentaalporselein voor tandheelkundige doeleinden.
DE19525361A1 (de) * 1995-02-16 1996-08-22 Herbst Bremer Goldschlaegerei Edelmetall-Legierung und Verwendung derselben
US5922276A (en) * 1998-02-17 1999-07-13 The Argen Corporation Gold alloy for porcelain/metal dental restorations
ATE291103T1 (de) * 2000-09-29 2005-04-15 Cendres & Metaux Sa Aufbrennfähige, hochgoldhaltige dentallegierung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004101835A1 *

Also Published As

Publication number Publication date
WO2004101835A1 (en) 2004-11-25
KR20050118301A (ko) 2005-12-16
NL1023458C2 (nl) 2004-11-22
JP2007527955A (ja) 2007-10-04
CA2520131A1 (en) 2004-11-25
CN1777688A (zh) 2006-05-24
BRPI0408748A (pt) 2006-03-28

Similar Documents

Publication Publication Date Title
EP0475528B2 (en) A dental porcelain, a method of producing a dental restoration, a dental alloy
US4104798A (en) Porcelain fused to metal crown
JP5590999B2 (ja) リンケイ酸ガラスセラミック
US5362438A (en) Powder of dental metal, a process for the preparation thereof, a process for the manufacture of a substructure for a dental restoration and a process for the manufacture of a dental restoration
PL198929B1 (pl) Stop dentystyczny zawierający srebro, zastosowanie tego stopu oraz część protezy dentystycznej zawierająca ten stop
WO2008033355A2 (en) Palladium-cobalt based alloys and dental articles including the same
JP3249149B2 (ja) 歯冠または歯橋などの歯の補綴物の基台の製造方法
US6325839B1 (en) Method for manufacturing dental restorations
US6656420B2 (en) Dental alloys
WO2004101835A1 (en) Gold alloy and method for manufacturing a dental restoration
JPH11507850A (ja) 超耐熱性型が粉末金属含有組成物で被覆される歯科用修復物を製造する方法
NL9200564A (nl) Dentaallegering en dentaalporselein voor tandheelkundige doeleinden.
JP4368343B2 (ja) 歯科陶材焼付用銀パラジウム合金
NL9200566A (nl) Dentaallegeringen.
US4608229A (en) Palladium metal base dental alloy
KR820002313B1 (ko) 치과용 비금속합금
US20240050206A1 (en) Cobalt-platinum based dental alloy materials
CA1151446A (en) Dental constructions and dental alloys
JP3258242B2 (ja) 歯科用オペーク陶材
CN101172089A (zh) 在制造牙齿修复物时用于形成牙齿套筒的材料
JPH111738A (ja) 歯科鋳造用陶材焼付貴金属合金
JPH0575810B2 (nl)
CA1112916A (en) Dental constructions and dental alloys
JPH10146646A (ja) ロストワックス法による金合金製品の製造方法
JPH0293033A (ja) 歯科用パラジウム合金

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20051011

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20061201