Zn-doping of silicate and hydroxyapatite-based cements: Dentin mechanobiology and bioactivity. (February 2021)

• Record Type: Journal Article
• Authors: Toledano, Manuel; Osorio, Raquel; Vallecillo-Rivas, Marta; Osorio, Estrella; Lynch, Christopher D.; Aguilera, Fátima S.; Toledano, Raquel; Sauro, Salvatore
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 114(2021)
• Publication Date: 2021-02
• Subjects: Zinc -- Cement -- Dentin -- Remineralization -- Bioactivity; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2020.104232
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: The objective was to state zinc contribution in the effectiveness of novel zinc-doped dentin cements to achieve dentin remineralization, throughout a literature or narrative exploratory review. Literature search was conducted using electronic databases, such as PubMed, MEDLINE, DIMDI, Embase, Scopus and Web of Science. Both zinc-doping silicate and hydroxyapatite-based cements provoked an increase of both bioactivity and intrafibrillar mineralization of dentin. Zinc-doped hydroxyapatite-based cements (oxipatite) also induced an increase in values of dentin nano-hardness, Young's modulus and dentin resistance to deformation. From Raman analyses, it was stated higher intensity of phosphate peaks and crystallinity as markers of dentin calcification, in the presence of zinc. Zinc-based salt formations produced low microleakage and permeability values with hermetically sealed tubules at radicular dentin. Dentin treated with oxipatite attained preferred crystal grain orientation with polycrystalline lattices. Thereby, oxipatite mechanically reinforced dentin structure, by remineralization. Dentin treated with oxipatite produced immature crystallites formations, accounting for high hydroxyapatite solubility, instability and enhanced remineralizing activity. Graphical abstract: Image 1 Highlights: Zn-doped silicate cements facilitate functional remineralization of dentin. Zn-loaded hydroxyapatite cements remineralize and seal root dentin. Zn promotes amorphous and stoichiometric apatites formation at dentin.