Examinando por Materia "Sodium hypochlorite"

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Acceso abierto
Efficacy of sodium hypochlorite at different concentrations and temperatures on the removal of agitated smear layer with a Navitip FX needle.
(Universidad Privada Norbert Wiener, 2022-05-29) Gutierrez Duno, Ana Gabriela; Huamani Caquiamarca, Yuliana Esther
Objective: To determine the efficacy of sodium hypochlorite at different concentrations and temperatures on the removal of dentin mud agitated with a Navitip FX needle. Methodology: Sixty single-rooted straight teeth were selected and divided into four groups according to the irrigation protocols. Group 1: 1ml of 1% NaOCl at 21ºC for 1 min + 1ml of 17% EDTA for 1 min; Group 2: 1ml of 1% NaOCl at 50ºC for 1 min + 1ml of 17% EDTA for 1 min; Group 3: 1ml of 3% NaOCl at 21ºC for 1 min + 1ml of 17% EDTA for 1 min; Group 4: 1ml of 3% NaOCl at 50ºC for 1 min + 1ml of 17% EDTA for 1 min. In all groups, NaOCl and EDTA were agitated with a Navitip FX needle. The teeth were examined under a scanning electron microscope to evaluate cleanliness in the coronal, middle, and apical thirds. The data were statistically analyzed using SPSS v20.0.0. Descriptive and inferential statistics were applied, and the Shapiro-Wilk test was used to assess the normality of the data. Results: No significant differences were found in the removal of the smear layer in the cervical and middle thirds, while in the apical third, 1% NaOCl heated to 50ºC was more effective (p = 0.0257). Conclusion: No significant differences were found in the removal of the smear layer when using 1% and 3% sodium hypochlorite at 21ºC and 50ºC.
Acceso abierto
Invitro evaluation of the chemical solubility of calcium silicate materials: theracal lc ®, biodentine ® and mta
(Universidad Privada Norbert Wiener, 2023-04-05) Zevallos Meneses, Nicole Fabiola; Huamani Caquiamarca, Yuliana Esther
Objective: To determine the solubility degree of Theracal LC, Biodentine, and MTA in the presence of 2.5% sodium hypochlorite over a period of 30 minutes. Methodology: The study aims to assess and compare the solubility rates of three calcium silicate-based materials, Theracal LC, Biodentine, and MTA, when exposed to 2.5% sodium hypochlorite for 30 minutes. Results: The solubility of the materials will be evaluated by measuring their mass before and after immersion in the sodium hypochlorite solution for the specified time. Conclusion: The results will provide insights into the solubility behaviors of Theracal LC, MTA, and Biodentine when subjected to sodium hypochlorite, an important factor in clinical applications such as root canal treatments.
Acceso abierto
Shear strength comparing three pre-etching agents in tooth enamel in relation to adhesion, in vitro study, Lima-2022
(Universidad Privada Norbert Wiener, 2023-09-30) Alejos Nureña, Paola Rosario; Rojas Ortega, Raúl Antonio
The objective of this study was to 'Determine the shear strength of three enamel pre-etching agents in relation to adhesion.' An in vitro, pure experimental, cross-sectional, prospective, and comparative study was developed. The sample consisted of 30 dental pieces, divided into three groups: Group A: 10 samples with 37% phosphoric acid applied for 15 seconds; Group B: 10 samples with 5.25% sodium hypochlorite applied for 60 seconds; Group C: 10 samples with 5.25% sodium hypochlorite applied for 60 seconds + 37% phosphoric acid applied for 15 seconds. The samples were then subjected to the HTL certified universal testing machine, calibrated and validated, which provides approximately 95% confidence level. According to the ANOVA parametric test, significant differences (p < 0.05) were observed between the three groups. It was found that between 37% phosphoric acid for 15 seconds and 5.25% NaClO for 1 minute, a significant difference (p < 0.05) exists; between 37% phosphoric acid for 15 seconds and 5.25% NaClO + 37% phosphoric acid for 15 seconds, no significant difference (p > 0.05) was found; and between 5.25% NaClO for 1 minute and 5.25% NaClO + 37% phosphoric acid for 15 seconds, significant differences (p < 0.05) were observed. Conclusion: Shear strength exists in enamel deproteinized with 5.25% NaClO prior to etching with 37% phosphoric acid, resulting in a higher average of 33.489, median of 32.44, variance of 48.854, standard deviation of 6.9896, a minimum value of 22.01, and a maximum value of 46.61, demonstrating the increase in adhesion pattern.