Effect of Surfactants on Physicochemical Properties of Amorphous Calcium Phosphate Filled Composites
Joseph M. Antonucci, Drago Skrtic
Our recent research on amorphous calcium phosphate (ACP) dental materials has resulted in biocompatible composites with high remineralizing ability and moderate mechanical strength. However, as a result of the uncontrolled agglomeration of ACP fillers within resin matrices, these bioactive composites have diminished strength and durability. In this study, we assess the role of non-ionic and anionic surfactants on particle size distribution (PSD), compositional and structural properties of ACP fillers, with special emphasis on the mechanical stability of the composites made with such fillers. Introducing surfactants during the spontaneous formation of ACP from supersaturated calcium and phosphate solutions stabilized the solid phase, but had very little or no effect on the PSD or the water content of ACP.The surfactant-ACP/Bis-GMA/ TEGDMA composites showed no improvement in their dry strength but showed drastic reduction in strength after prolonged aqueous exposure. Further studies are needed on ACP fillers to establish the role that critical parameters, e.g. particle size, surface treatment and water content, play in achieving optimal dispersion of ACP in matrix resins, and, ultimately, clinically suitable ACP composites.
and Skrtic, D.
Effect of Surfactants on Physicochemical Properties of Amorphous Calcium Phosphate Filled Composites, Society for Biomaterials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852568
(Accessed June 9, 2023)