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      Assessment of the tip surface of gutta-percha cones after different cutting methods

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          Abstract

          The surface of gutta-percha cones was evaluated after using five different cutting methods, including a new TipSnip device . The gutta-percha cones were cut off using: 1) TipSnip, 2) a single cut with a scalpel blade using a gauge, 3) two cuts with a scalpel blade using a gauge, 4) a razor blade against a glass slab or 5) scissors. Samples were examined under stereomicroscopy and observed by three highly qualified evaluators. The Kappa coefficient with a 95% confidence interval was used and all scores were tabulated and analyzed statistically using a nonparametric Kruskal-Wallis test with a 5% significance level. Cutting with scissors produced significant irregularities in the cone surface, providing the worst result. TipSnip, two cuts with scalpel blade, and cut with a razor against a glass slab provided the best results. A regular surface on the tips of gutta-percha cones improves apical fit, and may be achieved by means of different cutting methods.

          Translated abstract

          Fue evaluada la superficie de conos de gutapercha después de ser calibrados con cinco diferentes métodos de corte, incluyendo el nuevo dispositivo TipSnip. Los conos de gutapercha fueron cortados con TipSnip, con un corte con hoja de bisturí en regla calibrada, con corte de ida y vuelta con hoja de bisturí en regla calibrada, con hoja de afeitar sobre una platina de vidrio, o con tijeras. Las muestras fueron observadas bajo microscopía estereoscópica y examinadas por tres evaluadores altamente calificados y previamente calibrados utilizado el coeficiente Kappa con intervalo de confianza del 95%; todos los resultados fueron tabulados y analizados estadísticamente mediante el test no paramétrico de Kruskal-Wallis con un nivel de significancia del 5%. El corte con tijeras produjo significativas irregularidades en la superficie del cono, siendo el grupo con peores resultados. El corte con TipSnip, el corte de ida y vuelta con hoja de bisturí, y la hoja de afeitar obtuvieron los mejores resultados. Una superficie regular en la punta de los conos de gutapercha mejora la adaptación apical, y esto puede conseguirse por medio de diferentes métodos de corte.

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          Most cited references 24

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          Filling root canals in three dimensions.

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            Endodontia

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              Long-term sealing ability of resin-based root canal fillings.

              To evaluate the ability of two resin-based filling materials to provide immediate and long-term sealing of the root canal. A total of eighty-two human roots were instrumented and filled with AH Plus/gutta-percha or Epiphany/Resilon. Root filled teeth were sealed coronally either with Coltosol or Clearfil SE Bond/Filtek Z250 or were left unsealed. The quality of root canal sealing was assessed by a fluid filtration method performed at immediate and 180-day time intervals. Mean fluid filtration rates were analyzed by three-way repeated measures anova and Tukey post hoc test. Specimens filled with Epiphany/Resilon exhibited higher leakage than specimens filled with AH Plus/gutta-percha (P 0.05), whilst leakage in teeth without any coronal restoration was significantly higher (P < 0.05). After storage, a significant decrease in leakage (P < 0.05) was observed in all experimental groups. AH Plus/gutta-percha provided superior root canal sealing at both immediate and 180-day time periods. The presence of a coronal seal reduced leakage significantly. Storage of root filled specimens did not disturb the sealing ability of the tested materials.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                aol
                Acta Odontológica Latinoamericana
                Acta odontol. latinoam.
                Sociedad Argentina de Investigación Odontológica (Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina )
                1852-4834
                December 2011
                : 24
                : 3
                : 236-239
                Affiliations
                orgnameSchool of Dentistry of Piracicaba orgdiv1Endodontics Department
                orgnameState University of Campinas orgdiv1School of Dentistry of Piracicaba
                Article
                S1852-48342011000300003

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 25, Pages: 4
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