EP0312525A1 - Revetement en ionomere vitreux radiopaque en deux pates a utiliser avec des composites dentaires selon la technique du sandwich - Google Patents

Revetement en ionomere vitreux radiopaque en deux pates a utiliser avec des composites dentaires selon la technique du sandwich

Info

Publication number
EP0312525A1
EP0312525A1 EP87901094A EP87901094A EP0312525A1 EP 0312525 A1 EP0312525 A1 EP 0312525A1 EP 87901094 A EP87901094 A EP 87901094A EP 87901094 A EP87901094 A EP 87901094A EP 0312525 A1 EP0312525 A1 EP 0312525A1
Authority
EP
European Patent Office
Prior art keywords
liner
glass
glass ionomer
composites
cement
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Withdrawn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
EP87901094A
Other languages
German (de)
English (en)
Inventor
Parkash S. Photay
Avtar S. Photay
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.)
DENTAL COMPOSITE Ltd
Original Assignee
DENTAL COMPOSITE Ltd
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 DENTAL COMPOSITE Ltd filed Critical DENTAL COMPOSITE Ltd
Publication of EP0312525A1 publication Critical patent/EP0312525A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • A61K6/889—Polycarboxylate cements; Glass ionomer cements

Definitions

  • This invention relates to the use of lining materials for use with composite restorative materials by the "sandwich technique".
  • the application of composites alone has produced microleakage at the gingival margin, which is probably caused by polymerisation shrinkage forces of the composite creating a channel between the composite and the gingival margin which allows access to bacteria.
  • shrinkage forces are greater than the forces of adhesion between the composite and dentine, necessitating the development of either a new technique or other material to eliminate the channel.
  • Previous workers have utilised glass ionomer cements as a primary layer at the cavity floor or gingival wall prior to the placement of the composite.
  • Glass ionomers adhere strongly to dentine, and their curing mechanism does not create shrinkage forces as great as those for the setting of composites, so reducing the likelihood of microleakage. Moreover, the use of glass ionomers as linings has the desirable effect of continuous fluoride release into adjacent tooth structure, especially relevant in cases of high caries rate and susceptibility.
  • Ceramic/acrylic fillings are transparent to X-rays. As a result, it is impossible for the dentist to inspect restorations, and to detect decalcified dentine, caries, overhanging margins, defects and voids when examining radiographs of teeth restored with non-metallic fillings.
  • the first three problems can be overcome by using a glass ionomer/acrylic cement containing a filler to confer radiopacity, such as barium glass or barium sulphate.
  • the glass ionomer cement would minimiue dontine decalcification and secondary caries if a high fluoride ion-leachable glass were used, together with its constituent calcium salt content.
  • a radiopaque cement should enable detection of defects and voids, it is desirable to reduce their occurrence as far as possible.
  • Other desirable criteria which this liner should meet include:
  • the glass ionomer cement of this invention comprises an ionleachable fluoroaluminosilicate glass together with 15 to 30%, preferably about 20% by weight of barium glass or other suitable radiopaquer agents, to provide radiopacity. Blended with the glass is 0.1 to 10.0%, suitably 3 to 5% by weight of an organic peroxide, preferably benzoyl peroxide. Both glasses are in the form of fine powders, having a wet film thickness of less than about 15 ⁇ when dispersed in water.
  • the frit of the ion-leachable glass has a ternary oxide composition consisting of chemically combined oxides of calcium, aluminium and silicon, wherein:
  • alumina comprises 15-30% by weight of the total glass composition
  • (b) calcium oxide comprises up to 50% by weight of the total glass composition
  • silica comprises from 10-65% by weight of the total glass composition
  • the glass comprises less than 14% by weight of fluorine, introduced by the addition of aluminium fluoride, calcium fluoride and/or fluorine containing minerals such as cryolite.
  • the composition of the glass helps to control the setting time of the cement, which should be between one and ten minutes, and preferably two to five minutes, to allow the dentist adequate working time to mould the cement into the desired shape.
  • BIS-GMA bisphenol A and glycidyl methacrylate usually referred to as BIS-GMA;
  • aqueous solution of a polycarboxylic acid preferably poly (acrylic acid), of concentration 30-50% by weight
  • the polycarboxylic acid solution should contain a maximum of 5% by weight of an amine activator.
  • Representative amines include N,N-dimethyl-p-toluidine, N,N-diethyl-p-toluidine, N,N-dihydroxyethyl-p-toluidine, N,N-dimethyl-3,5-xylldine and p-(dimethylamino) phenylacetic acid, with N,N-dihydroxyethyl-p-toluidine being the preferred activator. Setting occurs by two mechanisms, namely:
  • An alternative embodiment of this invention is the subsitution of the chemical curing agents with a visible light curing systemo
  • a suitable photosensitising system comprises two components, namely an ⁇ -diketone photosensitive species together with an amine reducing agent.
  • Representative ⁇ -diketones include biacetyl, camphoroquinone, 2,2' - furil, p-toluil, ⁇ -and ⁇ -naphthil, benzil, phenanthraquinone and naphthoquinone, with camphoroquinone being the preferred photoinitiator.
  • amines include tripropylamine, tributylamine, N-alkyl dialkanolamines and 2-(dimethylamino) ethyl methacrylate with the latter being the most preferred.
  • Either or both components may be incorporated into either or both pastes, although it is preferred that both pastes contain both components.
  • the quantity of both ingredients is carefully controlled within the range 0.01 to 0.2% by weight of the paste, and most preferably within the range 0.03 to 0.08% by weight.
  • hardening should occur in 5 to 60 seconds, and suitably in 10 to 20 seconds.
  • the set glass ionomer cement of this invention is acid-etched with a 30-40% by weight aqueous solution of orthophosphoric acid for 30 to 60 seconds, washed with water and dried. It is then optionally treated with a dentinal bonding agent prior to the application of a composite restoration.
  • Suitable composites include two-paste chemically cured or single paste visible light cured formulations for the restoration of either anterior or posterior teeth.
  • the two components are thoroughly blended by spatulation for about 30 seconds and immediately placed on the glass ionomer liner, shaped, and allowed to set.
  • the composite With light cured composites, the composite is shaped in the lined cavity, and exposed to an intense beam of light of wavelength 420-450nm for 10 to 60 seconds preferably 10 to 20 seconds, to induce hardening.
  • the composite adhered fairly strongly to the glass ionomer liner as separation was difficult.

Abstract

Nouvelles matières de revêtement ionomères acryliques à utiliser pour les reconstitutions effectuées à l'aide de composites selon la technique du sandwich. Il s'agit de systèmes constitués de deux pâtes de faible viscosité, qui peuvent être polymérisés soit par un procédé chimique, soit par la lumière. Les revêtements contiennent une matière vitreuse à base de fluorosilicates alumineux, qui contribue à minimiser la décalcification de la dentine et les caries secondaires. Ces revêtements adhèrent à la dentine et aux composites et sont radiopaques, ce qui permet le détection des défauts par radiographie aux rayons X.
EP87901094A 1987-02-04 1987-02-04 Revetement en ionomere vitreux radiopaque en deux pates a utiliser avec des composites dentaires selon la technique du sandwich Withdrawn EP0312525A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1987/000085 WO1988005651A1 (fr) 1987-02-04 1987-02-04 Revetement en ionomere vitreux radiopaque en deux pates a utiliser avec des composites dentaires selon la technique du sandwich

Publications (1)

Publication Number Publication Date
EP0312525A1 true EP0312525A1 (fr) 1989-04-26

Family

ID=10610257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87901094A Withdrawn EP0312525A1 (fr) 1987-02-04 1987-02-04 Revetement en ionomere vitreux radiopaque en deux pates a utiliser avec des composites dentaires selon la technique du sandwich

Country Status (2)

Country Link
EP (1) EP0312525A1 (fr)
WO (1) WO1988005651A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU618772B2 (en) * 1987-12-30 1992-01-09 Minnesota Mining And Manufacturing Company Photocurable ionomer cement systems
AU2773789A (en) * 1988-01-15 1989-07-20 Kerr Manufacturing Company Dual curing glass ionomer dental cement
JPH0627047B2 (ja) * 1988-12-16 1994-04-13 而至歯科工業株式会社 歯科用グラスアイオノマーセメント組成物
DE3934803A1 (de) * 1989-10-19 1991-04-25 Voco Chemie Gmbh Verfahren zur herstellung eines dentalen zementes
US5154762A (en) * 1991-05-31 1992-10-13 Minnesota Mining And Manufacturing Company Universal water-based medical and dental cement
EP0623017A1 (fr) * 1991-12-31 1994-11-09 Minnesota Mining And Manufacturing Company Adhesif a base d'eau pour amalgame
GB9223068D0 (en) * 1992-11-04 1992-12-16 British Tech Group Command-curable composition
DE19638068A1 (de) * 1996-09-18 1998-03-19 Ernst Muehlbauer Zusammensetzung und Methode zur Zahnrestaurierung
JP4083257B2 (ja) * 1997-03-19 2008-04-30 株式会社ジーシー 歯科充填用レジン組成物
DE19726103A1 (de) * 1997-06-19 1998-12-24 Muehlbauer Ernst Kg Alumofluorosilicatglas
JP4467672B2 (ja) * 1999-08-10 2010-05-26 株式会社ジーシー 歯科用グラスアイオノマーセメントの硬化方法
US6818682B2 (en) 2001-04-20 2004-11-16 3M Innovative Properties Co Multi-part dental compositions and kits
US6742456B1 (en) * 2002-11-14 2004-06-01 Hewlett-Packard Development Company, L.P. Rapid prototyping material systems
DE102009016025B4 (de) 2009-04-02 2014-12-11 Voco Gmbh Kunststoffmodifizierter Glasionomerzement, seine Verwendung sowie Verfahren zu seiner Herstellung
EP3338756B1 (fr) 2016-12-21 2020-02-26 VOCO GmbH Ciment au verre ionomère stable au stockage, modifié par une résine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA746187B (en) * 1973-09-28 1975-11-26 Lee Pharmaceuticals X-ray opaque filler useful in dental and medical restorative compositions
US3971754A (en) * 1973-12-10 1976-07-27 Pennwalt Corporation X-ray opaque, enamel-matching dental filling composition
GB1532955A (en) * 1974-10-24 1978-11-22 Nat Res Dev Fluoraluminosilicate glasses
CH629664A5 (en) * 1977-04-19 1982-05-14 Espe Pharm Praep Polymerisable composition for dental purposes
WO1979000521A1 (fr) * 1978-01-17 1979-08-09 Nat Res Dev Compositions durcissables

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8805651A1 *

Also Published As

Publication number Publication date
WO1988005651A1 (fr) 1988-08-11

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