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1.
Rev. cient. odontol ; 8(3): e28, sept.-dic. 2020. tab
Article in Spanish | LILACS, LIPECS | ID: biblio-1253434

ABSTRACT

Objetivo: El propósito del estudio in vitro fue comparar la precisión de la longitud de trabajo de Root ZX mini, Proper Pixi, Woodpex III y Raypex 6 utilizando limas de acero inoxidable VDW C-Pilot n.º 15 y de níquel-titanio Maillefer n.º15. Materiales y métodos: Este estudio fue experimental in vitro. La muestra fue de treinta y cinco conductos mesiovestibulares de primeras molares inferiores, con cuatro localizadores apicales electrónicos Root ZX mini, Proper Pixi, Woodpex III y Raypex6. La longitud real se determinó con un calibrador Vernier digital y la medición electrónica se realizó utilizando limas de acero inoxidable y de níquel-titanio. Resultados: Al comparar la longitud real y longitud electrónica, no se encontró diferencias estadísticamente significativas (p < 0,05). Conclusiones: Se halló diferencias estadísticamente significativas al comparar la precisión de Root ZX mini, Proper Pixi, Woodpex III y Raypex 6 con limas de acero inoxidable; mientras que la precisión con limas de níquel-titanio no se vio afectada. (AU)


Objective: The purpose of this study was to compare the precision of the working length of Root ZX mini, Proper Pixi, Woodpex III and Raypex 6 using VDW C-Pilot No. 15 with Maillefer nickel titanium No. 15 and stainless steel files in mesiovestibular ducts of first lower molars. Materials and methods: This was an experimental in vitro study, including 35 mesiobuccal canals of lower first molars. The real length of 4 electronic apical locators, Root ZX mini, Proper Pixi, Woodpex III and Raypex6, was determined with a digital Vernier caliper, and electronic measurements were recorded using stainless steel and nickel titanium files. Results: There were no statistically significant differences between the real and the electronic lengths of the different tools studied (p <0.05). Conclusions: Statistically significant differences were obtained when comparing the precision of Root ZX mini, Proper Pixi, Woodpex III and Raypex 6 with stainless steel files, while the precision of nickel titanium files was not affected. (AU)


Subject(s)
Humans , Titanium , Dental Materials , Molar , Nickel , In Vitro Techniques
2.
Braz. dent. sci ; 23(1): 1-6, 2020. tab
Article in English | LILACS, BBO | ID: biblio-1049407

ABSTRACT

Objective: this study aimed to evaluate the effects of irrigants and dry canal on the accuracy of electronic apex locator (EAL) in locating simulated root perforations. Material and methods: twenty singlerooted, mandibular premolars were decoronated at CEJ, and the contents were removed with a barbed broach. The canals were instrumented up to a size of 15 K-file. The roots were artificially perforated at 4 mm from the anatomic apex. The actual length (AL) up to the perforation site was determined. The electronic length (EL) of perforations was obtained by Root ZX mini and iRoot in the dry canal and in the presence of 5.2% NaOCl, SmearOff, and 0.9% sodium chloride using a size 20 K-file. The differences between the EL and AL of the perforations were calculated. Statistical analyses using Friedman and Wilcoxon signed-rank tests were used to analyse the data with the level of significance set at p <0.05. Results: there were significant differences in different canal conditions with both Root ZX mini and i Root. Measurements in dry canals were significantly longer for both apex locators (p <0.05). Measurements with NaOCl were significantly shorter for both apex locators (p < 0.05). Both apex locators produced significantly accurate values for Saline and Smear OFF (p < 0.05). Conclusions: in this study, both Root ZX mini and i Root were affected by different canal conditions. The most accurate measurements were seen in the presence of saline and SmearOFF. (AU)


Objetivo: este estudo teve como objetivo avaliar os efeitos de irrigantes e canal seco na precisão do localizador apical eletrônico (EAL) em localizar perfurações radiculares simuladas. Material e métodos: vinte pré-molares inferiores unirradiculares tiveram suas coroas removidas na altura da JEC e o tecido pulpar removido com um extirpa nervos. Os canais foram instrumentados até a largura de uma lima k 15. As raízes foram perfuradas artificialmente a 4 mm do ápice anatômico. O comprimento real (AL) até o local da perfuração foi determinado. O comprimento eletrônico (EL) das perfurações foi obtido pelo Root ZX mini e iRoot no canal seco e na presença de 5,2% de NaOCl, SmearOff e 0,9% de cloreto de sódio usando uma lima K tamanho 20. As diferenças entre o EL e o AL das perfurações foram calculadas. Análises estatísticas, utilizando os testes de sinais por postos de Friedman e Wilcoxon, foram realizadas para analisar os dados com o nível de significância estabelecido em p < 0,05. Resultados: houve diferenças significativas nas diferentes condições do canal, tanto no Root ZX mini quanto no i Root. As medidas em canais secos foram significativamente maiores nos dois localizadores apicais (p < 0,05). As medidas com NaOCl foram significativamente mais curtas para os dois localizadores apicais (p<0,05). Ambos os localizadores apicais produziram valores significativamente precisos para Saline e Smear OFF (p < 0,05). Conclusões: neste estudo, tanto o Root ZX mini quanto o i Root foram afetados por diferentes condições do canal. As medidas mais precisa foram observadas na presença de soro fisiológico e SmearOFF. (AU)


Subject(s)
Sodium Hypochlorite , Bicuspid , Dental Equipment , Oral and Dental Hygiene Products
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