advances in dental

8/8/2019 Advances in Dental

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ADVANCES IN DENTALADVANCES IN DENTALRESEARCH WITH OOFRESEARCH WITH OOF

HAINE BECKHAINE BECK

DoctorDoctor in Dentalin Dental SciencesSciences

MScMSc inin EngineeringEngineering andand MaterialsMaterials ScienceScience

SaoSao PauloPaulo BrazilBrazil

[email protected]@las.inpe.br

20062006


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OverviewOverview

FiniteFinite elementelementanalysisanalysis hashas beenbeen

utilizedutilized inin DentstryDentstry

forfor manymany yearsyears

1,0861,086 paperspapers atat thisthis

momentmoment

((www.scirus.comwww.scirus.com))


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ButBut thethe samesameproblemproblem::

TheThe modelingmodeling......

NatureNature: 10: 10

HumainHumain: 5: 5


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OOF:OOF: advantagesadvantages

RealReal imageimage analysisanalysis EasyEasy to useto use

News perspectives toNews perspectives to

studystudy

www.ctcms.nist.gov/oof


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OOF:OOF: disadvantagesdisadvantages

AreAre therethere????

?


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OOF inOOF in DentstryDentstry::PastPast,, PresentPresent && FutureFuture


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TheThe PastPast


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StudyStudy ofofHybridHybridLayerLayer

((butbut...... WhatWhatss hybridhybridlayerlayer?)?)


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UnderstandingUnderstanding thethe hybridhybrid layerlayer

SequenceSequence ofofdentaldentalrestorationrestoration::

ClinicalClinical case:case:

FractureFracture ofofincisorsincisors


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ToTo concludeconclude thisthis case,case,thethe teethteeth waswas etchedetched

withwith 35%35% phosphoricphosphoric

acidacid for 15 s,for 15 s, rinsedrinsed withwithtaptap waterwater for 15 sfor 15 s andand

thethe incisorsincisors waswas slightlyslightly

airair--drieddried for 5 s.for 5 s. SoSo,, wewe havehave aa teethteeth withwith

manymany porousporous ((byby SEM)SEM)


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AA fluidfluid resinresin calledcalledadhesiveadhesive isis

aplicadedaplicaded onon thethe

teethteeth,, andand thetheadhesiveadhesive willwill invadedinvaded

thethe porousporous ofofthethe

teethteeth


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WithWith thethe lightlight--curingcuringunitunit,, thethe adhesiveadhesive willwill

bebe curedcured byby 3030 4040

secondsseconds


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NowNow,, wewe havehave thethehybridhybrid layerlayer,, thethe mostmostimportantimportant stepstep onon thetheaestheticaesthetic dentaldental

restorationrestoration

(AD =(AD = adhesiveadhesive

T =T = dentindentin tubulaltubulal

D =D = dentindentin))


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ThenThen thethe dentaldental restorationrestoration cancan bebe concludedconcluded......


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((AllAll thesethese stepssteps dondontt bebe

soso simplesimple,, ofofcoursecourse))


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OkOk,, butbut therethere areare differentdifferent lightlight--curingcuring unitsunits......

...... andand differentdifferent techniques of restoration.....techniques of restoration.....


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... and, to finish, there are different hybrid layers

... and, to finish, there are different hybrid layers

obtained with different adhesives...obtained with different adhesives...


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Because of this, the strong internal stress (A,B) can make aBecause of this, the strong internal stress (A,B) can make a

deflection of dental structures (C) and the marginal integritydeflection of dental structures (C) and the marginal integrityof the restoration will be failure in a short time (D)of the restoration will be failure in a short time (D)

Versluis, A; Tantbirojn, D; Douglas, WH.Versluis, A; Tantbirojn, D; Douglas, WH.Do dental composites alwaysDo dental composites always

shrink toward the light?shrink toward the light? Journal of Dental ResearchJournal of Dental Research, 77: 1435, 77: 1435--1445,1445,1998.1998.


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With OOF, we study the stress of different hybrid layers inWith OOF, we study the stress of different hybrid layers in

mechanical tests, and we make a clinical study (2 years, April,mechanical tests, and we make a clinical study (2 years, April,

20052005-- April, 2007, 31 patients, 58 teeth), and we will compareApril, 2007, 31 patients, 58 teeth), and we will compare

the results obtained with OOF and the clinical performance ofthe results obtained with OOF and the clinical performance of

the dental restorations. The partial results (6 months and 1the dental restorations. The partial results (6 months and 1

year) showed a fantastic relation of stress level and clinicalyear) showed a fantastic relation of stress level and clinicalperformance.performance.


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TheThe presentpresent


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StudyStudy ofofinterfaceinterface ofoftotaltotal ceramicceramic dentaldental

prothesisprothesis

((AgainAgain...... WhatWhat isis thisthis?)?)


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ExampleExample

TradicionalTradicional metalmetal--ceramicsceramics prothesisprothesis

hashas beenbeen changedchanged forfor

totaltotal ceramicceramicrestorationsrestorations


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ZirconiaZirconia,, aluminaalumina--

zirconiazirconia andand aluminaaluminabasedbased ceramicsceramicsretiredretired thethe metalmetal ofof

dentaldental prothesisprothesis inin thethenewnew DentstryDentstry

TheThe feldspaticfeldspatic

porcelainporcelain ((calledcalledveneerveneer porcelainporcelain) is) isthethe samesame ofofthethe metalmetal--ceramicceramic prothesisprothesis


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ButBut thethe new interfacenew interfaceveneerveneer--porcelainporcelain &&

corecore--porcelainporcelain isis veryvery

criticalcritical ((failuresfailures))


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WithWith OOF,OOF, wewe studystudy thisthis interfaceinterface andand wewe

havehave nownow moremore informationinformation aboutabout thisthis.. SoSo,, weweareare workingworking toto developmentdevelopment a new totala new total

ceramicceramic systemsystem,, withwith aa betterbetter interfaceinterface corecore--

veneerveneer porcelainporcelain.. LetLetss seesee......


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TheThe futurefuture((MyMy perspectives &perspectives & mymy wisheswishes))


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ThatThat OOF openOOF open JpegJpeg,, TiffTiffandand othersothers simplesimple

imageimage formatsformats...... ButBut dondontt worryworry,, ititss onlyonly lawlawofofminorminor workwork......


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OOFOOF runrun onon Microsoft WindowsMicrosoft Windows

+

+

More people, moreresearches, more

results...


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Open DICOM files (traditional files of tomographyOpen DICOM files (traditional files of tomographyand resonance magnetic) like the freeand resonance magnetic) like the free brazilianbraziliansoftware for modeling calledsoftware for modeling called InVesaliusInVesalius

http://http://www.cenpra.gov.br/promed/software.htmwww.cenpra.gov.br/promed/software.htm


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ThanksThanks......

MyMy TeamTeam ofofCenterCenter ofofVirtualVirtual AnalysisAnalysis,, SaoSao Paulo,Paulo,BrazilBrazil ((AndreAndre CasileCasile, Carlos, Carlos HummelHummel andand Sandro Silva)Sandro Silva)

Sorriso Modelo DentalSorriso Modelo Dental ClinicClinic,, SaoSao Paulo,Paulo, BrazilBrazil, for, for thetheclinicalclinical studystudy aboutabout hybridhybrid layerlayer

DepartamentDepartament ofofMaterialsMaterials,, NationalNational InstituteInstitute ofofSpatialSpatialResearchResearch (INPE),(INPE), SaoSao Jose dos Campos,Jose dos Campos, BrazilBrazil, for, for thethestudiesstudies andand thethe developmentdevelopment ofofthethe newnew ceramicceramic systemsystem

andand

OOFOOF TeamTeam (OOF Project is(OOF Project is amazingamazing,, reallyreally...)...)

CONGRATULATIONS!CONGRATULATIONS!!!!!!!

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