Examinando por Materia "Calcium hydroxide"

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(Universidad Privada Norbert Wiener, 2017-12-18) Huallpa Tucto, Elizabeth Evelyn; Malpartida Quispe, Federico Martin
The objective of this study was to evaluate the inhibitory effect of the essential oil of muña mixed with calcium hydroxide, compared to four solutions, against Enterococcus faecalis (ATCC 29212). The agar well diffusion method with 6 mm diameter wells was applied to examine the substances, including saline solution (negative control). The inhibition zones were measured at 24 and 72 hours, with the following results: 16.17 mm and 15.36 mm for the essential oil of muña mixed with calcium hydroxide; 9.18 mm and 8.68 mm for the essential oil of muña; 19.89 mm and 17.09 mm for the 3Mix-MP paste; 21.40 mm (for both time periods) for 2% chlorhexidine gluconate; and 17.89 mm and 15.60 mm for the mixture of 2% chlorhexidine gluconate with calcium hydroxide. The study concluded that the inhibitory effect of the essential oil of muña mixed with calcium hydroxide was lower than that of the 3Mix-MP paste, the 2% chlorhexidine gluconate, and the mixture of 2% chlorhexidine gluconate with calcium hydroxide, but greater than that of the essential oil of muña.
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Antibacterial activity of propolis and its combination with calcium hydroxide on Enterococcus Faecalis. in vitro study 2021.
(Universidad Privada Norbert Wiener, 2022-06-10) Perez Llantoy, Linda Katherine; Vilchez Bellido, Dina
The purpose of this study was to determine the antibacterial activity of 30% propolis extract and its combination with calcium hydroxide against Enterococcus faecalis ATCC 19433 strains. The sample consisted of Enterococcus faecalis ATCC 19433 cultures, divided into four groups of 25 cultures: three experimental pastes (calcium hydroxide "PrevestDenPro" 70%, 30% propolis extract, and calcium hydroxide 70% combined with 30% propolis) and one negative control (distilled water), with inhibition halos measured at 24 and 48 hours. The results showed antibacterial activity in all three experimental pastes (inhibition halos > 0): 70% calcium hydroxide (M: 7.164 and M: 7.664), 70% calcium hydroxide + 30% propolis (M: 7.804 and M: 8.184), and 30% propolis extract (M: 12.848 and M: 13.428) at 24 and 48 hours, respectively. Significant differences were found between the inhibition halos at 24 and 48 hours for each substance (p value < 0.05). Pairwise comparisons showed significant differences between propolis extract and calcium hydroxide (sig: 0.00), and between calcium hydroxide + propolis extract and propolis extract (sig: 0.00), with no significant difference between calcium hydroxide and calcium hydroxide + propolis extract (sig: 0.080 and 0.484 at 24 and 48 hours). In conclusion, there is antibacterial effectiveness of 30% propolis extract and its combination with calcium hydroxide against Enterococcus faecalis ATCC 19433 strains at 24 and 48 hours, with 30% propolis extract showing the highest antibacterial activity.
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Evaluation of the antibacterial capacity of two endodontic cements based on Calcium Hydroxide and Zinc Oxide against Enterococcus Faecalis strains. In vitro study.
(Universidad Privada Norbert Wiener, 2020-11-04) Gonzales Rojas, Heidy Aracely; Ordoñez Lopez, Carmen Jenny
The objective of this study was to determine the antibacterial capacity of two endodontic cements based on calcium hydroxide and zinc oxide against Enterococcus Faecalis strains. In this in vitro, experimental, longitudinal, and prospective research, the sample consisted of 40 specimens divided into two experimental groups and two control groups. The agar diffusion test was used to determine the antibacterial capacity. For this, the Enterococcus Faecalis ATCC 29212 strain was inoculated onto Mueller Hinton agar plates, and four equidistant perforations were made where the materials were placed. The antibacterial capacity was evaluated by measuring the inhibition halos at 2, 24, and 48 hours. It was found that chlorhexidine gluconate produced the largest bacterial growth inhibition halos, which were statistically significant (p<0.05). When comparing the endodontic cements, it was found that the calcium hydroxide-based endodontic cement produced the largest bacterial growth inhibition halos, which were statistically significant compared to the zinc oxide-based endodontic cement (p<0.05). Conclusion: The calcium hydroxide-based endodontic cement demonstrated better antibacterial capacity against Enterococcus Faecalis.