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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!!!!!!!