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17.11.2023 | Original Article

Mechanical properties of simulated dentin caries treated with metal cations and l-ascorbic acid 2-phosphate

verfasst von: Mohammad Ali Saghiri, Julia Vakhnovetsky, Amir Abdolmaleki, Elham Samadi, Fatereh Samadi, Salvatore Napoli, Michael Conte, Steven M. Morgano

Erschienen in: Odontology | Ausgabe 2/2024

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Abstract

This pH cycling study aimed to investigate the effects of l-Ascorbic acid 2-phosphate (AA2P) salts of Mg, Zn, Mn, Sr, and Ba on the surface microhardness, compressive strength, diametral tensile strength (DTS), and solubility of root canal dentin. 186 cylindrical dentin specimens from 93 teeth were fortified with optimal concentrations of AA2P salts of Mg (0.18 mM), Zn (5.3 µM), Mn (2.2 × 10^–8 M), Sr (1.8 µM), and Ba (1.9 µM). Saline was used as the control group. These dentin specimens underwent a 3-day cycling process simulating dentin caries formation through repeated sequences of demineralization and remineralization. Surface microhardness at 100 and 500 µm depths (n = 10/subgroup), scanning electron microscopy (n = 3/group), compressive strength (n = 10/group), DTS (n = 6/group), and solubility (n = 5/group) tests were performed to analyze the dentin specimens. Data were analyzed using Kolmogorov–Smirnov, one-way ANOVA, and Post Hoc Tukey tests (p < 0.05). The control group had significantly lower microhardness at both depths (p < 0.001), reduced DTS (p = 0.001), decreased compressive strength (p < 0.001), and higher weight loss (p < 0.001) than all other groups. The Sr group had the highest compressive strength and microhardness among all the groups. The microhardness was significantly higher for the 500 µm depth than the 100 µm depth (p < 0.001), but the difference in microhardness between depths across groups was not significant (p = 0.211). All fortifying solutions provided some protection against artificial caries lesions. Therefore, these elements might have penetrated and reinforced the demineralized dentin against acid dissolution.

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Titel: Mechanical properties of simulated dentin caries treated with metal cations and l-ascorbic acid 2-phosphate
verfasst von: Mohammad Ali Saghiri
Julia Vakhnovetsky
Amir Abdolmaleki
Elham Samadi
Fatereh Samadi
Salvatore Napoli
Michael Conte
Steven M. Morgano
Publikationsdatum: 17.11.2023
Verlag: Springer Nature Singapore
Erschienen in: Odontology / Ausgabe 2/2024
Print ISSN: 1618-1247
Elektronische ISSN: 1618-1255
DOI: https://doi.org/10.1007/s10266-023-00868-z

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Mechanical properties of simulated dentin caries treated with metal cations and l-ascorbic acid 2-phosphate

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