EN ISO 7490:2000
(Main)Dental gypsum-bonded casting investments (ISO 7490:2000)
Dental gypsum-bonded casting investments (ISO 7490:2000)
Dentale gipsgebundene Einbettmassen (ISO 7490:2000)
Diese Internationale Norm legt eine Einteilung fest und beschreibt Anforderungenan gipsgebundene Einbettmassen sowie Prüfmethoden, mit denen die Übereinstimmung mit den Anforderungen festgestellt werden kann.
Revêtements à couler dentaires à liant-plâtre (ISO 7490:2000)
Dental gypsum-bonded casting investments (ISO 7490:2000)
General Information
- Status
- Withdrawn
- Publication Date
- 14-Dec-2000
- Withdrawal Date
- 25-Feb-2008
- Technical Committee
- CEN/TC 55 - Dentistry
- Drafting Committee
- CEN/TC 55 - Dentistry
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 26-Feb-2008
- Completion Date
- 26-Feb-2008
Relations
- Effective Date
- 22-Dec-2008
Frequently Asked Questions
EN ISO 7490:2000 is a standard published by the European Committee for Standardization (CEN). Its full title is "Dental gypsum-bonded casting investments (ISO 7490:2000)". This standard covers: Diese Internationale Norm legt eine Einteilung fest und beschreibt Anforderungenan gipsgebundene Einbettmassen sowie Prüfmethoden, mit denen die Übereinstimmung mit den Anforderungen festgestellt werden kann.
Diese Internationale Norm legt eine Einteilung fest und beschreibt Anforderungenan gipsgebundene Einbettmassen sowie Prüfmethoden, mit denen die Übereinstimmung mit den Anforderungen festgestellt werden kann.
EN ISO 7490:2000 is classified under the following ICS (International Classification for Standards) categories: 11.060.10 - Dental materials. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 7490:2000 has the following relationships with other standards: It is inter standard links to EN 27490:1991. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 7490:2000 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dental gypsum-bonded casting investments (ISO 7490:2000)Dentale gipsgebundene Einbettmassen (ISO 7490:2000)Revetements a couler dentaires a liant-plâtre (ISO 7490:2000)Dental gypsum-bonded casting investments (ISO 7490:2000)11.060.10Dental materialsICS:Ta slovenski standard je istoveten z:EN ISO 7490:2000SIST EN ISO 7490:2001en01-november-2001SIST EN ISO 7490:2001SLOVENSKI
STANDARDSIST EN 27490:20001DGRPHãþD
ReferencenumberISO7490:2000(E)©ISO2000INTERNATIONALSTANDARDISO7490Secondedition2000-12-15Dentalgypsum-bondedcastinginvestmentsRevêtementsàcoulerdentairesàliant-plâtreSIST EN ISO 7490:2001
ISO7490:2000(E)PDFdisclaimerThisPDFfilemaycontainembeddedtypefaces.InaccordancewithAdobe'slicensingpolicy,thisfilemaybeprintedorviewedbutshallnotbeeditedunlessthetypefaceswhichareembeddedarelicensedtoandinstalledonthecomputerperformingtheediting.Indownloadingthisfile,partiesacceptthereintheresponsibilityofnotinfringingAdobe'slicensingpolicy.TheISOCentralSecretariatacceptsnoliabilityinthisarea.AdobeisatrademarkofAdobeSystemsIncorporated.DetailsofthesoftwareproductsusedtocreatethisPDFfilecanbefoundintheGeneralInforelativetothefile;thePDF-creationparameterswereoptimizedforprinting.EverycarehasbeentakentoensurethatthefileissuitableforusebyISOmemberbodies.Intheunlikelyeventthataproblemrelatingtoitisfound,pleaseinformtheCentralSecretariatattheaddressgivenbelow.©ISO2000Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeitherISOattheaddressbeloworISO'smemberbodyinthecountryoftherequester.ISOcopyrightofficeCasepostale56CH-1211Geneva20Tel.+41227490111Fax+41227490947E-mailcopyright@iso.chWebwww.iso.chPrintedinSwitzerlandii©ISO2000–AllrightsreservedSIST EN ISO 7490:2001
ISO7490:2000(E)©ISO2000–AllrightsreservediiiContentsPageForeword.ivIntroduction.v1Scope.12Termanddefinition.13Classification.14Requirements.14.1Appearanceofpowder.14.2Fluidityatworkingtime.14.3Settingtime.14.4Compressivestrength.24.5Linearsettingexpansion.24.6Linearthermalexpansion.25Sampling,testconditionsandmixing.25.1Sampling.25.2Testconditions.25.3Mixing.26Testmethods.36.1Visualexamination.36.2Fluidityatworktime.36.3Settingtime.36.4Compressivestrength.56.5Linearsettingexpansion.66.6Linearthermalexpansion.67Manufacturer'sinstructions.88Packaging.88.1Packaging.88.2Mouldlining.89Marking.8SIST EN ISO 7490:2001
ISO7490:2000(E)iv©ISO2000–AllrightsreservedForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote.AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectofpatentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.InternationalStandardISO7490waspreparedbyTechnicalCommitteeISO/TC106,Dentistry,SubcommitteeSC2,Prosthodonticmaterials.Thissecondeditioncancelsandreplacesthefirstedition(ISO7490:1990),whichhasbeentechnicallyrevised.SIST EN ISO 7490:2001
ISO7490:2000(E)©ISO2000–AllrightsreservedvIntroductionTheoriginalnameofthisInternationalStandardwas“Dentalgypsum-bondedcastinginvestmentforgoldalloys”.Inthisrevisionthelimitationtogoldalloyshasbeenremovedandthetitlehasbeenchangedtoreflectthis.SIST EN ISO 7490:2001
INTERNATIONALSTANDARDISO7490:2000(E)©ISO2000–Allrightsreserved1Dentalgypsum-bondedcastinginvestments1ScopeThisInternationalStandardestablishesaclassificationof,andspecifiesrequirementsfor,gypsum-bondedcastinginvestments.Italsospecifiestestmethodstobeusedtodeterminecompliancewiththeserequirements.2TermanddefinitionForthepurposesofthisInternationalStandard,thefollowingtermanddefinitionapplies.2.1dentalgypsum-bondedcastinginvestmentpowdermixtureofcalciumsulfatehemihydrateandsilicaand/orotherrefractorymaterialsNOTEThepowdermayalsocontainsmallquantitiesofmodifyingagents.3ClassificationDentalgypsum-bondedcastinginvestmentsareclassifiedasfollows:Type1:Forcastinginlaysandcrowns.Type2:Forcastingcompleteandpartialdenturebases.Initsclassification,aparticularmaterialneednotberestrictedtoonlyonetype.4Requirements4.1AppearanceofpowderWhenexaminedvisually(6.1),thepowdershallbeofuniformappearanceandfreefromforeignmatterandlumps.4.2FluidityatworkingtimeWhentestedinaccordancewith6.2,thediameterofthesetmaterialshallbeatleast60mmforType1and40mmforType2materials.4.3SettingtimeWhentestedinaccordancewith6.3,theVicattimeshallnotvarybymorethan20%fromthemanufacturer’sclaimedsettingtime.Ifthemanufacturerclaimsarange,thenthesettingtimeshallnotvarybymorethan20%fromthemidpointofthisrange.SIST EN ISO 7490:2001
ISO7490:2000(E)2©ISO2000–Allrightsreserved4.4CompressivestrengthWhentestedinaccordancewith6.4,Type1materialsshallhaveaminimumcompressivestrengthof2,3MPaandType2materialsshallhaveaminimumcompressivestrengthof2,6MPa.4.5LinearsettingexpansionWhendeterminedinaccordancewith6.5,thelinearsettingexpansionshallnotdifferbymorethan20%fromthevalueclaimedbythemanufacturer.Ifthemanufacturerclaimsarangethenthevaluedeterminedshallnotdifferfromthemidpointofthisrangebymorethan20%.4.6LinearthermalexpansionWhendeterminedinaccordancewith6.6,thelinearthermalexpansionofthematerialshallnotdifferbymorethan20%fromthevalueclaimedbythemanufacturer.Ifthemanufacturerclaimsarangethenthevaluedeterminedshallnotdifferfromthemidpointofthisrangebymorethan20%.5Sampling,testconditionsandmixing5.1SamplingSufficientretailpackagesofthematerialofonebatchshallbeobtainedtoprovideatleast5kgofmaterial.Anypackagesthatarenotsealedshallbediscarded.Whenthepowderissuppliedinbulk,itshallbethoroughlyblendedandstoredinamoisture-proofcontainerpriortotesting.5.2TestconditionsAlltestingoftheinvestmentshallbecarriedoutat(232)Cand(5010)%relativehumidityandinaroomfreefromobviousdrafts.Alltestequipmentshallbecleananddry.Thebowlsusedformixingshallbeclean,shallbemoistenedandexcesswatershallbeshakenoff.Beforetestingbegins,equipmentandmaterialshallbeallowedtoequilibratewiththespecifiedtesttemperatureandhumidityatleastfor5hto6h.Somecomponentsofthemixingandtestingequipmentarecleanedbetweentests.Theseitemsshouldbeallowedtoreturntothespecifiedtesttemperaturebeforebeingreused.5.3Mixing5.3.1Apparatus5.3.1.1Cleanapparatusformixingasrecommendedbythemanufacturerintheinstructions[item7d)].5.3.1.2Timingdevicesuchasastopwatch.5.3.2ProcedureMeasure,toanaccuracyof1%,300gofpowderandtherequiredvolumeofwaterasgivenbythemanufacturer’sinstructionsinaccordancewithitem7c).Ifthemanufacturerspecifiesarangeofvolumeforthewater,usethemidpointoftherange.Pourthewaterintothemixingbowlandsifttheinvestmentpowderintothewaterwithin10s,minimizingentrapmentofair.Begintimingfromthemomenttheinvestmentpowderandthewaterfirstmakecontact.Handspatulatefor15sataspeedofabouttwot
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