Abstract
Two groups of resins reinforced by different ratios of nano-hydroxyapatite were used to produce the novel dental composite, with the main purpose of measuring the water sorption (WS) and solubility (SO) of the prepared nanocomposites. Ten experimental specimens were prepared in disk-shaped with and without filler materials, in two groups, each group was classified according to filler contents (0, 1, 2, 3, and 4) wt. % of nano-hydroxyapatite. Each specimen was stored for 7 days in water, proceeding to measure the mass of each specimen. After drying process, the specimen masses were determined. Then WS and SO were calculated from these determinations. The results showed that values of water sorption after 1 week for group A composite and group B composite ranged (9.66 to 13.07 mg/mm3) and (5.11 to 8.52) mg/mm3, respectively, while solubility was (2.97 to 3.25) mg/mm3 for group A and (1.83 to 2.26 mg/mm3)for the composites specimens of group B, respectively. For composite with different filler contents the results showed a high filler contents of 4% for each group with high value of water sorption (WS) and solubility (SO). It could be concluded that the percentage of sorption and solubility of composite based on acrylic and amide were significantly lower than that based on acrylate.
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