Counterclockwise or clockwise reciprocating motion for oval root canal preparation: a micro-CT analysis

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dc.contributor.authorEspir, C. G. [UNESP]
dc.contributor.authorNascimento-Mendes, C. A. [UNESP]
dc.contributor.authorGuerreiro-Tanomaru, J. M. [UNESP]
dc.contributor.authorFreire, L. G.
dc.contributor.authorGavini, G.
dc.contributor.authorTanomaru-Filho, M. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-11-26T17:49:04Z
dc.date.available2018-11-26T17:49:04Z
dc.date.issued2018-05-01
dc.description.abstractAimTo evaluate oval root canal preparation using one or two instruments in counterclockwise or clockwise reciprocating motion. MethodologyThe radiographic diameter of mandibular human incisors was evaluated, and oval canals were selected (2Diameter Ratio4). Fifty-seven teeth were assigned to root canal preparation (n=19): Reciproc 40 (R40) in a counterclockwise reciprocating motion; Mtwo size 40, .06 taper (M 40.06) in a clockwise reciprocating motion or Mtwo size 20, .06 taper and size 40, .06 taper (M 20/40.06) in a clockwise reciprocating motion. Mtwo instruments were coupled to an ENDO DUAL motor, turning 150 degrees clockwise and 30 degrees counterclockwise. Scanning was performed before and after root canal preparation using a SkyScan 1176 micro-computed tomography. Volume, percentage of debris and percentage of uninstrumented surface were analysed in the entire root canal and in each third of the canal. Data were compared using anova and Tukey's tests or Kruskal-Wallis and Dunn tests. ResultsThe Reciproc and Mtwo systems using different kinematics were associated with a similar increase in root canal volume. Additionally, both system had similar percentage of uninstrumented surface (P>0.05). Mtwo size 20, .06 taper and size 40, .06 taper was associated with significantly lower debris (P<0.05) in the middle third (0.56%) when compared to R40 (1.31%) and M size 40, .06 taper (1.54%). ConclusionsThe conventional reciprocation motion for R40 and the clockwise reciprocation motion for Mtwo resulted in similar root canal preparations. Less remaining debris was present in the middle third when two instruments with different diameters were used.en
dc.description.affiliationSao Paulo State Univ, Dept Restorat Dent, Araraquara Dent Sch, Araraquara, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Dept Dent, Sao Paulo Dent Sch, Sao Paulo, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Dept Restorat Dent, Araraquara Dent Sch, Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2015/03437-6
dc.format.extent541-548
dc.identifierhttp://dx.doi.org/10.1111/iej.12776
dc.identifier.citationInternational Endodontic Journal. Hoboken: Wiley, v. 51, n. 5, p. 541-548, 2018.
dc.identifier.doi10.1111/iej.12776
dc.identifier.issn0143-2885
dc.identifier.urihttp://hdl.handle.net/11449/164086
dc.identifier.wosWOS:000429544400006
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofInternational Endodontic Journal
dc.relation.ispartofsjr1,791
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectmicro-computed tomography
dc.subjectreciprocating motion
dc.subjectroot canal preparation
dc.titleCounterclockwise or clockwise reciprocating motion for oval root canal preparation: a micro-CT analysisen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-Blackwell

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