Examinando por Materia "Cementos a base de silicato de calcio"

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In vitro study of the compressive strength in the surface microhardness of four cements based on calcium silicate: white portland cement, gray portland cement, added trioxide mineral (MTA Angelus®) and biodentinetm, Lima- 2020.
(Universidad Privada Norbert Wiener, 2021-03-20) Navarro Huamani, Bayoleth Celia; Guillén Galarza, Carlos Enrique
The objective of this study was to determine the compressive strength and surface microhardness of four calcium silicate-based cements: White Portland Cement, Gray Portland Cement, Mineral Trioxide Aggregate, and Biodentine™. This research was experimental, cross-sectional, and prospective with a comparative design. The non-probabilistic sample consisted of 80 calcium silicate-based cement cylinders, divided into 20 cylinders per group. A data collection sheet was used to record the fracture measurements of each sample. The database and statistical analysis were performed using SPSS version 22.0. Results: After 24 hours, the compressive strength and surface microhardness of the Biodentine cement was 33.33 kg/mm², followed by White Portland Cement and Gray Portland Cement with values of 6.18 and 6.81 kg/mm², respectively, and Mineral Trioxide Aggregate (MTA-Angelus) with 5.07 kg/mm². After 48 hours, the compressive strength and surface microhardness of Biodentine was 38.42 kg/mm², followed by White Portland Cement and Gray Portland Cement with values of 7.95 and 8.41 kg/mm², respectively, and Mineral Trioxide Aggregate (MTA-Angelus) with 7.44 kg/mm². These differences between groups were statistically significant (p>0.05). Conclusion: Biodentine cement demonstrated significantly higher compressive strength and surface microhardness compared to MTA, White Portland Cement, and Gray Portland Cement at both 24 and 48 hours.