The influence of precursor addition order on the porosity of sol–gel bioactive glasses. Issue 9 (September 2018)

• Record Type: Journal Article
• Authors: Fernando, Delihta; Colon, Pierre; Cresswell, Mark; Journet, Catherine; Pradelle-Plasse, Nelly; Jackson, Phil; Grosgogeat, Brigitte; Attik, Nina
• Is Part Of: Dental materials. Volume 34:Issue 9(2018)
• Page Start: 1323
• Page End: 1330
• Publication Date: 2018-09
• Subjects: Bioactive glass -- Sol–gel -- Porosity -- Surface area -- Mesoporous -- Network modifiers -- Precursors order; Dentistry -- Periodicals; Dental materials -- Periodicals; 617.695
• DOI: 10.1016/j.dental.2018.06.003
• Languages: English
• ISSNs: 0109-5641

Abstract

Highlights: Network modifying precursor order addition affects the sol-gel bioactive glass textural properties. Significant increase of surface area and pore volume was achieved by modulating the precursor sequence addition. This simple and straightforward route enables us to improve the surface properties of bioactive glasses. For all those reasons, a possible application in restorative dentistry is proposed for the elaborate bioactive glasses. Abstract: Objective: The superior textural properties of sol–gel derived bioactive glasses compared to conventional melt quench glasses accounts for their accelerated bioactivity in vitro . Several studies have explored ways to improve the surface properties of sol–gel glasses in order to maximise their efficiency for bone and tooth regeneration. In this study, we investigated the effect of order of network modifying precursor addition on the textural properties of sol–gel derived bioactive glasses. Methods: The effect of precursor addition order on the glass characteristics was assessed by switching the order of network modifying precursor (calcium acetate monohydrate and sodium acetate anhydrous) addition for a fixed composition of bioactive glass (75SiO2 :5CaO:10Na2 O:10P2 O5 ). Results: The results of this study showed that the order of precursor addition does influence the porosity of these glasses. For the glasses of a fixed composition and preparation conditions we achieved a doubling of surface area, a 1.5 times increase in pore volume and a 1.2 times decrease in pore size just by the mixing the network modifying precursors and adding them together in the sol–gel preparation. Significance: This simple and straightforward route adaptation to the preparation of bioactive glasses would allow us to enhance the textural properties of existing and novel composition of bioactive glasses and thus accelerate their bioactivity.