vita 氧化锆瓷块word版本

VITAIn-Ceram? YZ

WorkingInstructions

VITAshadetaking VITAshadecommunication VITAshadereproduction VITAshadecontrol

Dateofissue:09.12

VITAshade,VITAmade.

Partiallyyttrium-

stabilizedzirconiumdioxideforhigh-

temperaturesintering

Aspects of material technology 材料方面的技术3 Technicaldata 技术参数5 Advantagesandbenefits 优势和益处6 Indication 7 Informationon preparation 9 Substructuredesign 11 Coloringthesubstructures 13 Sintering inthe high-temperaturefurnace 15 Reworkingafter sintering 17 High-gloss polishing 19 Veneeringwith VITAVM9 21 Informationonbonding/Trepanation 23 Assortments,accessories and equipment 24 Literature 26

Aspectsofmaterialtechnology

)isanoxideceramicwithmanyfascinatingproperties,suchasit Zirconiumdioxide(ZrO

2 stranslucencyinthecaseofthinwallthicknesses,itsbrightcoloranditsout-standingbiocompatibility.Itisnocoincidencethatthismaterialisfrequentlyusedinthefi eldofimplantology.Inadditiontothis,itfeaturesahighdegreeofcrackresistancewhichdi stinguishesitamongoxideceramics.

Thelatterisaresultoftheso-

calledpolymorphismofzirconiumdioxide.Thecrystallatticeisstabilizedinitstetragonalhig h-temperaturephasebymeansofsuitableadditives,e.g.yttrium-oxidewhichalsoavoidsfurthertransformationintothemonoclinicphasewhichwouldother wiseautomaticallyoccurduringthecoolingprocess.Onlywhenapplyinganexternalsource ofenergy,asforexampleinthecaseofabeginningcrack(seefig.1),individualzirconiumdioxi degrainsaretransformedlocallyfromtheirtetragonaltothemonoclinicform,whichisaccom

particles).

-paniedby an increase involume of 3-5% (see fig. 1 green ZrO

2 Thisprocedureisdescribedastransformationstrengthening.Thecompressivestressthati sformedinthestructure(seearrowsinfig.1)preventsunhinderedgrowthof acrackthatwouldleadtothefailureoftheceramic.Thispropertyisalsoreflectedinthelonglife ofzirconiumdioxideunderpermanentloading.

VITAIn-CeramYZisporouslypresintered zirconium dioxide (seefig.

2)partiallystabilizedwithyttriumoxide(Y-TZP,yttriastabilizedtetragonalzirconiapoly-crystal).Fromthismaterial,whichiseasytoprocessinthiscondition,enlargedcrownandbri dgesubstructuresaremilledintheCAD/CAMsystem.

Theshrinkagewhichtakesplaceduringthesubsequentsinteringprocessinaspecialhigh-temperaturefurnace(VITAZYrcomat/VITAZYRCOMAT6000MS)isexactlycalculated.T heendresult:substructureswithahighdegreeofstrengthandmarginalaccuracywhichfeat urealltheadvantagesofthephysicalpropertiesofpartiallystabilizedzirconiumdioxide.Sub structuresmadefromVITAIn-CeramYZareveneeredwiththefine-structureceramicVITAVM9.

Fig.1

Schematicdiagram

ofthephasetransformationprocessofZrO

2

T r a n s m i s s i o n [%]

Fig.2

SEMmicrographofthemicrostructureofnon-sinteredVITAIn-CeramYZ(enlargementx20,000)

Fig.3

SEMmicrographofthemicrostructureofsint eredVITAIn-CeramYZ0(enlargementx20,000)

Flexuralstrength(MPa)

StudybyProf.Dr. R.Giordano,UniversityofBoston,2007

Lighttransmission(%)

Zirconialighttransmissionstudy

(0,7mmthickness)

StudybyVITAResearchandDevelopmentDept.,2010

Technicaldata

Physical dataVITAIn-CeramYZ—物理数据

* Thetechnical/physicalvaluesaretypicalmeasuringresultsandrefertointernalsamplesandmeasurementequipmentavailableonsite.Ifsamplesarepreparedusingdifferentmethodsan dmeasurementequipment,othermeasuringresultsmaybeobtained.

ChemicalcompositionVITAIn-CeramYZ—化学成分

All-ceramicrestorationsmadefromVITAIn-CeramYZofferthefollowingadvantages: Highreliability/strength

Unsurpassed strength(>900MPa)andexcellentfracture

toughness.Approx.10yearsofclinicalexperience.

Excellentfit/quality

Thehighmaterialhomogeneityensuresrestorationswithconsistentlyaccuratefitandwi thoutanydeformation.Theexactdeterminationoftheenlargementfactorandtheintegra tionoftheinformationintothebarcodeoftheblockguaranteecontrolled sinteringshrinkag eandhenceutmostprecision.

Reducedfabricationtime

Manualcoloringcanbecompletelyomittedthroughtheuseoftheindustriallypre-coloredVITAIn-CeramYZColorLL1pblocks.

High-speed sintering

Moreover high-speed sinteringof VITA In-CeramYZis possible (80 minutesonly).The proven material properties andquality standards ofVITA In-Ceram YZremainunchanged.

Homogeneouscoloring

Industriallyprecoloredblocksensureconsistent,homogeneouscoloringandhenceconstantlyh ighandreproducibleestheticsofdentalrestorations.

Wideindicationrange

VITAIn-CeramYZissuitableforallindications-fromcrownsubstructurestomulti-unitbridgesubstructures(withmax.2connectedpontics).

General

?Tooth-colored,metal-freerestoration ?Veryhighresistancetofunctionalloading ?Minimallyinvasiverestorationsarepossible

?Radiopaque

?Primaryelements,conicalandtelescopiccrowns ?Crownsubstructuresintheanteriorandposteriorareas ?Anteriororposteriorbridgesubstructureswithmax.2pontics ?Cantileverbridgesubstructures(cantileverponticnotbiggerthanpremolar) Advantagesforfullyanatomicalrestorations ?Bridgerestorationsintheposteriorarea ?Ceramicindicationalsowhenlimitedocclusalspaceisavailable(0.7mm)

?Time-savingandeconomicfabrication

VITAIn-CeramYZ

1

VITAVM9 VITAPM9 v recommended j possible

1) Connectorsurface:connectorsurfaceabutmentcrown–pontic,orbetween2pontics

2) Cantileverbridgeunitshouldbemodelledapprox.1/3narrowerinitsvestibular/oraldimension.

Contraindication

?parafunction,suchasbruxism

?inadequateoralhygiene

?inadequateresultsofpreparation

?insufficientremainingnaturaltoothsubstance

Generalnotesonpreparation

Achamferorshoulderwitharoundedinneranglearesuitable.Theverticalprepa-rationangleshouldbeatleast3°.Alltransitionsfromtheaxialtotheocclusalor incisalsurfac esshouldberounded.

Homogeneous,smoothsurfacesarerecommended.

Indicated:Shoulderpreparation

Contraindicated: ‖Gutter-

shaped‖preparationmargin

Indicated:Chamferpreparation

Contraindicated:Tangentialprepa-

ration

Minimumwallthicknesses-crown-inmm

occlusal ≥0.7 bottomofthefissure

≥0.7 circumferential ≥0.5 marginal

≥0.2

max.2mm

atleast 1.2mm

atleast0.7mm

atleast1.2mm

atleast1.4mm

atleast0.7mm

atleast1.4mm

atleast 1.5 mm

Preparationofposteriorteeth(forsubstructureandveneer)

? Wallthicknessofthecompletecrown-occlusal:atleast1.4mmOcclusalwallthicknessofthesubstructure:atle ast0.7mmveneer:max.2.0mm

?

Circumferentialwallthicknessofthesubstructure:atleast0.5mm veneer:atleast0.7mm

?

Crownmargin:atleast0.5mm

Preparationofanteriorteeth(forsubstructureandveneer)

? Wallthicknessofthesubstructure-incisal:atleast0.7mmveneer:max.2.0mm

? Circumferentialwallthicknessofthesubstructure:atleast0.5mm veneeringmaterial:atleast0.7mm ?

Crownmargin:atleast0.5mm

atleast0.5mm

≥0.7mm

Preparationofposteriorteethforfullyanatomicalrestorations ≥0.7mm

≥0.2mm

Mind.0,5 mm

Mind.0,5 mm

Mind.0,7 mm

Mind.0,5 mm

Mind.0,5mm

Mind.0,7mm

Substructuredesign

InordertoensurelastingclinicalsuccessofrestorationsmadeofVITAIn-CeramYZ,theminimumwallthicknessesoffullyanatomicalandreducedres torationsmustbeadheredto. Sharpedgesontheframeworkshouldgenerallybeavoided.

Substructuredesignforveneeredrestorations ?Reducedtoothshape

?Cuspsupported

?Thicknessofveneermax.2mm

Frameworkdesignforfully anatomicalrestorations

atleast.

0.7mm

atleast.0.7mm

atleast.

0.5mm atleast.0.5mm atleast.0.5mm

atleast.0.5mm

Heighth Heighth Heighth ? ? Aspectswhichshouldbetakenintoaccountwhendesigningtheconne ctorsurfacesofbridgesubstructures:

1. The heighthoftheconnectorsurfacesshouldbeaslargeaspossible.

2. Theheighthshouldbelargerthan,oratleastequalwiththewidthb.

Theconnector surfaces ofbridge substructures must be concavely

rounded.Sharpcornersandedgesaretobeavoided.

Important! Stabilityandfunctionshouldbegivenpriorityoveresthetics.

Note:

Wepointoutthat,dependingonthefabricationprocessoftheabutments,sharpedgesma yexistwhichmaycausefractureoftherespectivesubstructuresofzirconiumdioxidecrow nsandbridgesduringtheperiodofwearing. Sharpedgesmustgenerallybeavoidedforceramicrestorations.

Reworkingthemilledrestoration

Aftercompletionofthemillingprocessandbeforesintering,therestorationmustbecutoffan dground(fig.1)withadiamondmillingtool.Themorethicklymilledmarginsmustbereduced(f ig.3).

Fig.1

Fig.2

Important:

Sincedustisformedwhengrinding

dentalceramicproducts,alwayswearafacemaskorgrin dwhenwet.

Additionally,itisrecommendedtoworkbehindasafetyshieldand useanextractionunit.

Dependingonthesoftware,varioustypesofsinteringsupportsarerequiredforlarge-spanbridgestructurestoensuresinteringwithoutanydeformation.However,ifthissu pportconsistsonlyofaremainingpieceoftheblock/disc,

thevolumeshouldbereducedtoguaranteeevenheatingupduringthesinteringprocess.

Inordertofacilitatehigh-glosspolishingofsinteredfullyanatomicalrestorations,itisrecommendedtosmoothenthe milledrestorationwiththedarkgreysmoothingwheel(VI-R22WG)includedintheVITAIn-CeramProcessingSettechnical(availablefrom October2012).

Fig.3

Note:

Subsequentprocessingofthesinteredsubstructuresh ouldgenerallybeavoided.

Thesurfacestructureofceramicmaterialsisdecisivefortheirflexuralstrength.Subsequent processingofsinteredVITAIn-CeramYZrestorationswithabrasiveinstrumentsistobeavoided,particularlyintheconnect orareaofbridges.Mechanicalsurfaceprocessingmaycausedamagetothestructureinthes interedcondition.Thiscanleadtophasetransformationoveralargeareaofthe

ZrO 2,andtosurfacetensionsduetodistortionofthecrystallatticeandtocracksandlatecrack sintheveneerafterseatingtherestoration.Therefore,surfacesthataretobeindividualized withVITAVM9(layeringtechnique)mustnotbesandblasted.

ColoringthesubstructureswithVITAIn-Ceram?YZCOLORINGLIQUID

Applicationarea

LiquidforcompleteorpartialcoloringofmilledVITAIn-CeramYZ substructuresbe-

foresintering.YZCOLORINGLIQUIDis availablein4differentcolorsandmatchedin

awaytoenablethereproductionofallVITASYSTEM3D-MASTERandVITAclassicalA1–

D4shadeswiththeVITAVM9veneeringmaterial.

Pleaseobservetheinformationonthefollowingpages.

Note:

Thephysicalmaterialproperties,suchasflexuralstrength,fracturetough-

nessandWeibullcoefficientarenotadverselyaffectedbytheuseofthe YZCOLORI

NGLIQUIDs.

Use

Makesurethatthesurfaceoftherestorationisnottoosmoothinordernottoaffectthepenetrati

onoftheColoringLiquid.Toachieveconsistentcoloringresults,anydustorgreasemustbe

removedfromthesubstructurebefore

theuse.Thenacleaningcycleinadentalfurnaceisrequiredtoremovecoolantsorlubricantsfr

omtheporousstructure.

Cleaning firing inthe VITAVACUMAT?

Therestorationisimmersedinthecoloringliquidaccordingtotheshadetobereproduced.T

hesubstructureisplacedintheliquidinawaytoavoidbubblesandtoensurecompletecovera

gewithliquid.Therecommendedimmersiontimeis2minutes.When immersingthe

substructure, vacuumor pressure (2bars)can beusedadditionally.

SubsequentlyremoveexcessYZCOLORINGLIQUIDwithapapertissue.Makesuretoavo

idpuddlesingaps.Thenleavetodryforashortperiod.Donotsinterinwetcondition!

Observespecialinformationforhigh-speedsintering.

Colorclassification

Thebasiccolorslight/paleandmediumarematchedwiththeshadereproductionwithVITAVM9.

*The additionalcolor intense is usedfor makingthetwo basiccolors moreintensive (more chromatic). The additional color neutral isused to reduce the intensity ofthetwobasiccolors(lesschromatic).Bothcolorscanalsobeusedintheirpureform:intensetoachieveaveryhighdegreeofshadeintensity;neutral,

e.g. todecreasethelightnessofVITAIn-CeramYZ.TheshaderesultsincombinationwithVITAVM9maydiffersignificantlyfromtheshadesample.

Forindividualcharacterization,YZCOLORINGLIQUIDcanalsobeappliedinathin,homoge

neouslayerwithabrushontotheareasoftherestorationtobecolored.Thesubstructurecanb ecoloredfromwithinandwithoutatthemarginsinordertoensurecompletepenetrationofthe color.

Importantinformation: TheapplicationbrushshouldonlybeusedfortheapplicationofYZCOLORING LIQUID.Do notuseforlayeringtheceramic:dangerofdiscoloration!Cleanthebrushonlywithdistilll edwater.Thebrushshouldnotcontainanymetaltoavoidreactions.

Pleaseobservealso the instructions foruse of theVITAIn-

CeramYZ COLORINGLIQUIDS. Shakegentlytopressthebridgesubstructuresintothebedofbeadstoensureocclusalorin

cisalsupportduringsintering.Sinteringbeadsintheproximalareashouldberemovedbef oresintering.

Toensureunhinderedburningoutoforganiccomponents,restorationscoloredwithYZCOLO RINGLIQUIDmustbesinteredonlyinasinteringcruciblewithanair vent(Prod. No.

E38011/E38014). Asan alternative,thelid canbeomitted. RestorationscoloredwithYZCOLORINGLIQUIDcanbesinteredinthehigh-speedmode

inthe VITAZYRCOMAT6000MS.Priortosinterfiring, predrying ofthecoloredrestorationsismandatory.OnlytheMSsinteringdishmaybeusedinthehigh-speedmode.

Thenprocessing iscontinued.

Sinteringinthehigh-temperaturefurnaceVITAZYrcomat

Sinteringparameters

ThesinteringprogramforVITAIn-CeramYZhasbeenpredetermined:?SwitchontheVITAZYrcomatfurnaceandcontrolunit.?Usetheliftkeytolowertheliftcompletely.?Placethesinteringdishinthecenterofthefiringtrayandcoverwithsinteringcrucible .…Two-

storied―sinteringbystackingcruciblesandthesinteringdishesispossible(seefig.).

?Closetheliftusingtheliftkey.Holdthekeypresseduntilthefiringchamberiscompletel yclosed.

?Press…START―keyto startthesinterfiring.?Thesinteringprogramwillthenrunautomatically:Durationoftheprogramcycl eincludingcoolingdownto200°C:approx.7.5h.

?Risingtime:1.5h

?Endtemperature:1530°C ?Holdingtimeatendtemperature:2h

?Coolingdownto400°Cwithfiringchamberbeingclosed(liftkeyca

nonlybeoperatedfromatemperatureof400°C)

Note

Donotopenthefurnaceuntilthetemperatureisbelow200°C! Thiswillincreasetheservicelifeofthesinteringdishandthecrucible.

Sinteringinthehigh-speedsinteringfurnaceVITAZYRCOMAT6000MS

Sinteringprograms

TheVITAsintering programsare prestored undertheIn-Ceram

materialkey.Thefollowingprogramscanbeselected:

?In-CeramUniversalprogram:conventionalsinteringin7h20min

(incl.coolingdown)

?In-

CeramYZSpeedprogram:HighSpeedsinteringin80min(inkl.coo

lingdown)

Pleasenote:PlacethespecialMSsinteringdishinthecenteroftherecessonthefiringtray.

IMPORTANT:Duringhighspeed sintering,…tw o-

storied―sintering bystackingcruciblesandthesinteringdishesisnotpossible!

Note:

Bridgeswithupto7unitscanbesinteredintheMSsinteringdish. Bridgesorbridgesubstructureswith8or9unitsareplaceddirectlyinthecenterofthefiringtra ywithoutsinteringdishandsinteringbeadsusingthecorrespondingsinteringsupports(acc ordingtotheinstructionsofthemanufacturerofthesystemorsoftware).

Generalinformationonsinteringinhigh-temperaturefurnaces

Placeanteriorcrownsubstructuresintothesinteringdishwiththelabialorlingualsurfacefa cingdownward;ideally,anteriorbridgesubstructuresshouldbeplacedontheincisalsurfac eandposteriorcrownandbridgesubstructureswiththeocclusalsurfacefacingdownward. Itisrecommendedtosinterbridgesubstruc-

turesinthesinteringdish.Makesurethattheentiresurfaceofthesubstructureissupported bythefiringsupporttoavoiddeformation.Careshouldbetakento preventsinteringbeadsfrom becoming…jammed―intheconnectorareas.Thefitofthesubstr ucturecanbecheckedafterasinteringprocessandacoolingphaseofapprox.10min.

Important

VITAIn-CeramYZ canbesinteredinallhigh-temperaturefurnaces,whichcan beoperatedwiththesinteringparametersindicatedabove.Theusermustobservetheresp ectiveinstructionsofthefurnacemanufacturer. VITAdoesnotgrantawarrantyoracceptanyliabilityfordamageresultingfromsinteringVIT AIn-CeramYZinfurnacesofothermanufacturers.

Reworking and surface treatment aftersintering

Milledrestorationsshouldpreferablybeadjustedbeforesintering.However,ifreworkin gisrequired,thefollowingbasicaspectsneedtobeobserved:

?Correctionsneedtobemadewithdiamondinstrumentsforwetgrindingunderwatercool ingandatalowpressure.

?Usenewfine-graineddiamondswithredcolorcoding

(fine=27-76μm)orless(extra-fine,yellow10-36μmorultra-fine,white4-

14μm).

?Itisalsopossibletoprocessthesubstructureusingsoft,diamondrubberpolishersan dahandpiecewithslowspeedsandlowpressure.Makesuretouse only PU-

bonded (polyurethane) polishers. This material

canbeeasilyremovedandburnsoutwithoutleavinganyresidue.

Silicone-

bondedpolisherscannotbecompletelyremoved.Thismayaffectthebondingareatowards theveneeringmaterial.

?Theinstrumentmustlieflatonthesurfaceandchatteringmustbeavoided.

?Toavoidphasetransformation,surfacestobeveneeredmustnotbesandbla sted.

Important:

Aftergrindingwerecommendthermaltreatment(regenerationfiring)ofthesubstructuretor everseanyphasetransformationsonthesurface.

Any microcrackswhichhavearisencannotberegenerated.

Recommendationforsurfacetreatmentoffullyanatomical

VITAIn-CeramYZrestorations

?Doubleglazelayer;previouslyhigh-

glosspolishingofareas/surfaceswhichareinocclusionisrequired ?Occlusalcut-

backandindividualizationwithVITAVM9materials(layeringtechnique)

Whyis glazing recommended?

High-gloss polished zirconiumoxidedoesnot causelossofsubstance(= abrasion)ontheantagonistandisnotabradedbytheantagonisteither.Abrasion,however,a lwaysoccursinthenaturaldentition.Byapplyingaglazelayertothezirconiumoxide,natural abrasionisimitated.Thiswayprematurecontactsinthezirconiumoxiderestorationareavoi ded.

VITAAKZENTGlazeSprayisrecommendedforglazing.

High-glosspolishing

Carefullhigh-glosspolishingoftheocclusalsurfaceisalwaysurgentlyrequiredfortheoverallfunctionaleff ectoftherestorationsincethesurfaceroughnessofunpolished zirconiumoxidecausesincreasedloss ofsubstance(abrasion)ontheantagonist.High-glosspolishedzirconiumoxide,however,doesnotcauseanyloss ofsubstanceontheantagonistsinceitdoesnothaveabrasivepropertiesandevenresistspla que.*)

High-glosspolishingmustalsoalwaysbecarriedoutbeforecharacterizationoftheshade(staining technique).

Reason:Iftheceramicthathasbeenfusedtothesubstructureissubjecttoabrasionorhasbe engroundoff,thezirconiumoxideisexposed.Ifitishighglosspolished,itwillnothaveanyabra siveproperties.

*)StudybyDr.Rosentritt,UniversityofRegensburg

VITAIn-CeramYZProcessing/PolishingSets*

?VITAIn-

CeramYZProcessingSettechnical(indirect)withinstrumentsforthehandpie

ce

?VITAIn-CeramYZPolishingSetclinical(direct)withinstruments

forthecontra-angle

Thesesetsareparticularlysuitableforefficientandtime-savingprocessingorpolishingfullyanatomicalVITAIn-CeramYZrestorationsandcompriseall

instrumentsforwell-

coordinatedprocessingandpolishing(technical:indirect)orpolishing(clinical:direct). High-gloss polishing(technical)

1. Prepolishingthegroundareas/surfaceswiththespecialdiamond-

coated,pinkrubberpolishersoftheVITAIn-CeramYZProcessingSettechnicalata speedof7,000 –12,000rpm.

2. High-glosspolishingiscarriedoutwiththediamond-

coated,greyrubberpolishersoftheVITAIn-

CeramYZProcessingSettechnicalatareducedspeedof5,000 –10,000rpm. Itismandatorytoavoidgenerationofheat!