Cone-beam computed tomographic analysis: Comparison of the efficacy of two rotary retreatment systems for removal of filling material from primary teeth obturated with contemporary endodontic sealers

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dc.contributor.authorMoreira, Camila Said
dc.contributor.authorMartinho, Frederico Canato
dc.contributor.authorCoelho, Marcella Pavanello Batista
dc.contributor.authorCoutinho Júnior, Luis Roberto Manhães
dc.contributor.authorda Silva, Eduardo Galera
dc.contributor.authorTorres, Carlos Rocha Gomes
dc.contributor.authorGomes, Ana Paula Martins
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2022-04-29T08:44:57Z
dc.date.available2022-04-29T08:44:57Z
dc.date.issued2015-07-01
dc.description.abstractIntroduction: This study has used cone-beam computed tomography (CBCT) to evaluate the efficacy of two different nickel titanium (NiTi) rotary retreatment systems for removal of filling material from teeth obturated with contemporary endodontic sealers. The operative time required for removal of root filling materials was also evaluated. Methods: Sixty root canals were randomly divided into three groups according to the sealer used for obturation: AH Plus Jet, mineral trioxide aggregate (MTA) Fillapex, and RoekoSeal Automix (RSA) (all, n = 20). After obturation, each group was subdivided into two subgroups according to the NiTi retreatment rotary system: Mtwo retreatment (Mtwo-R) file subgroup and ProTaper-UR subgroup–both instrumented with Mtwo-R files. Teeth were scanned with a microcomputed tomography before and after obturation. Results: Residual filling material was observed in 100% of the specimens after retreatment. No difference was found between Mtwo-R and ProTaper-UR systems (p > 0.05). The RSA was more effectively removed from dentin walls than AH Plus Jet (p < 0.05), with no difference to MTA Fillapex (p > 0.05). Thus, teeth obturated with RSA required less operative time to be retreated (both, p<0.05). Conclusion: ProTaper-UR and Mtwo-R systems were effective in removing the filling materials after instrumentation, but they could not eliminate them completely. Moreover, teeth obturated with silicone-based sealer RSA showed less residual filling material in dentin walls compared to the epoxy resin-based sealer (AH Plus Jet), which exhibited no difference compared to the salicylate resin-based sealer (MTA Fillapex). Teeth obturated with silicon-based sealer also required less operative time to be retreated despite the NiTi rotary retreatment system tested.en
dc.description.affiliationDepartment of Restorative Dentistry Endodontic Division São José dos Campos Dental School State University of São Paulo
dc.description.affiliationDepartment of Restorative Dentistry Operative Dentistry Division São José dos Campos Dental School State University of São Paulo
dc.format.extent129-137
dc.identifierhttp://dx.doi.org/10.5005/jp-journals-10015-1328
dc.identifier.citationWorld Journal of Dentistry, v. 6, n. 3, p. 129-137, 2015.
dc.identifier.doi10.5005/jp-journals-10015-1328
dc.identifier.issn0976-6014
dc.identifier.issn0976-6006
dc.identifier.scopus2-s2.0-84945246107
dc.identifier.urihttp://hdl.handle.net/11449/231363
dc.language.isoeng
dc.relation.ispartofWorld Journal of Dentistry
dc.sourceScopus
dc.subjectNiTi retreatment system
dc.subjectRetreatment
dc.subjectRoot canal
dc.subjectSealer
dc.titleCone-beam computed tomographic analysis: Comparison of the efficacy of two rotary retreatment systems for removal of filling material from primary teeth obturated with contemporary endodontic sealersen
dc.typeArtigo

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