Effects of NaOCl, EDTA and MTAD when applied to dentine on stress distribution in post-restored roots with flared canals

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dc.contributor.authorBelli, S.
dc.contributor.authorEraslan, O.
dc.contributor.authorEraslan, O.
dc.contributor.authorEskitascioglu, M.
dc.contributor.authorEskitascioglu, G.
dc.date.accessioned2020-03-26T18:50:23Z
dc.date.available2020-03-26T18:50:23Z
dc.date.issued2014
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractAimTo evaluate the effect of NaOCl, EDTA and MTAD on the stress distribution and levels in roots with flared canals and three different aesthetic post systems using finite element stress analysis (FEA). MethodologyThree-dimensional (3D) FEA models simulating a maxillary incisor with excessive structural loss and flared root canals were created. The dentine of the first models of each post group was assumed as homogenous, whereas the others were deemed as having their elastic modulus affected up to 100m deep as a result of irrigation protocol (5.25 NaOCl, 17% EDTA and MTAD for 2h). A sound incisor tooth model was used as the control. Restorations were created according to the post system used (pre-fabricated fibre post (PFP)), polyethylene fibre (Ribbond) post and core build-up (RBP), and one-piece milled zirconia post and core (ZP). Ceramic crowns were added to the models. A 300-N static load was applied at the centre of the palatal surface of the models to calculate the stress distributions. The SolidWorks/Cosmosworks structural analysis programmes were used for FEA analysis. Results were presented by considering von Mises criteria. ResultsThe analysis of the von Mises stresses revealed that RBP created less stress in the remaining root dentine when compared to PFP and ZP. ZP maintained the stresses inside its body and reduced stress on the palatal surface of the root; however, it forwarded more stress towards the apical area. NaOCl-, EDTA- and MTAD-treated dentine increased the stresses within the root structure regardless of the effect of the post system used (11-15.4 MPa for PFP, 9.5-13.02 MPa for RBP and 14.2 MPa for ZP). Amongst the irrigation solutions used, EDTA and MTAD increased the stresses more than NaOCl in all models. All the irrigation solutions showed the same stress levels and distributions in the ZP model. ConclusionNaOCl-, EDTA- and MTAD- treated dentine and a rigid post with high elastic modulus may increase fracture risk in roots with flared canals by increasing the stresses within root dentine. Therefore, solutions that alter the elastic modulus of dentine less (such as NaOCl) or an individually shaped post-core system constructed with a material that has an elastic modulus close to dentine (polyethylene fibre) should be used in weak roots.en_US
dc.description.sponsorshipScientific Research Projects Coordination Center (BAP) of Selcuk University, Konya, TurkeySelcuk Universityen_US
dc.description.sponsorshipThis study was performed in the Research Center of the Dental Faculty, Selcuk University and supported in part by Scientific Research Projects Coordination Center (BAP) of Selcuk University, Konya, Turkey.en_US
dc.identifier.doi10.1111/iej.12260en_US
dc.identifier.endpage1132en_US
dc.identifier.issn0143-2885en_US
dc.identifier.issn1365-2591en_US
dc.identifier.issue12en_US
dc.identifier.pmid24506847en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1123en_US
dc.identifier.urihttps://dx.doi.org/10.1111/iej.12260
dc.identifier.urihttps://hdl.handle.net/20.500.12395/30802
dc.identifier.volume47en_US
dc.identifier.wosWOS:000345323700005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherWILEYen_US
dc.relation.ispartofINTERNATIONAL ENDODONTIC JOURNALen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectEDTAen_US
dc.subjectfibre posten_US
dc.subjectfinite element analysisen_US
dc.subjectMTADen_US
dc.subjectNaOClen_US
dc.subjectone-piece milled zirconia posten_US
dc.titleEffects of NaOCl, EDTA and MTAD when applied to dentine on stress distribution in post-restored roots with flared canalsen_US
dc.typeArticleen_US

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