Title of article :
Evaluation of Threshold Values for Root Canal Filling Voids inMicro-CT and Nano-CT Images
Author/Authors :
Dessel, Jeroen Van OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium , Orhan, Kaan OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium , Jacobs, Reinhilde OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium , Celikten, Berkan OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium , Huang, Yan OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium , Vasconcelos, Karla de Faria OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium , Nicolielo, Laura Ferreira Pinheiro OMFS IMPATH Research Group - Department of Imaging & Pathology - Faculty of Medicine - University of Leuven and Oral &Maxillofacial Surgery - University Hospitals Leuven - Leuven, Belgium
Abstract :
Whileseveralmaterialsandtechniqueshavebeenusedtoassessthequalityofrootcanalfillingsinmicro-CTimages,thelackofstandardizationinscanningprotocolshasproducedconflictingresults.Hence,theaimofthisstudywastodetermineacutoffvoxelsizevaluefortheassessmentofrootcanalfillingvoidsinmicro-CTandnano-CTimages.Twentyfreshlyextractedmandibularcentralincisorswereused.RootcanalswerepreparedwithnickeltitaniumfilestoanISOsize40/0.06taperandthenfilledwithasinglecone(40/0.06taper)andAHPlussealer.Theteethwerescannedwithdifferentvoxelsizeswitheithermicro-CT(5.2,8.1,11.2,and16.73μm)ornano-CT(1.5and5.0μm)equipment.ImageswerereconstructedandanalyzedwiththeNReconandCTAnsoftware.Voidproportionandvoidvolumewerecalculatedforeachtoothintheapical,middle,andcoronalthirdsoftherootcanal.Kruskal-WallisandposthocMann–WhitneyUtestswereperformedwithasignificancelevelof5%.Inmicro-CTimages,significantlydifferentresultsweredetectedamongthetestedvoxelsizesforvoidproportionandvoidvolume,whereasnosuchdifferenceswerefoundinnano-CTimages(p>005).Micro-CTimagesshowedhighervoidnumbersovertheentirerootlength,withstatisticallysignificantdifferencesbetweenthevoxelsizeof16.73μmandtheothersizes(p<005).Thevaluesofthedifferentnano-CTvoxelsizesdidnotsignificantlydifferfromthoseofthemicro-CT(5.2,8.1,and11.2μm),exceptforthevoxelsizeof16.73μm(p<005).Alltestedvoxelsizesenabledthedetectionofrootcanalfillingvoidsexceptforthevoxelsizeof16.73μm.Bearinginmindthelimitationsofthisstudy,itseemsthatavoxelsizeof11.2μmcanbeusedasareliablecutoffvaluefortheassessmentofrootcanalfillingvoidsinmicro-CTimaging.
Keywords :
Evaluation , Threshold Values , Root Canal Filling Voids , Micro-CT , Nano-CT Images
