A Modification of Spherical Particles Calcium Sulfate for Alveolar Bone Defect

Abstract:

Calcium sulfate hemihydrate has been used for many years as a biomaterial. However, too fast a degradation rate and lack of bioactivity have limited its application in orthopaedic field. Herein, α-Calcium sulfate hemihydrate is used as the raw material to prepare spherical particles calcium sulfate with stir method. Microstructures, degradation, and bioactivity of the materials were characterized by XRD, FT-IR and SEM. The effects of solutions of sodium silicate (Na₂SiO₃) on the structure and properties of the materials were analyzed. The results indicate that both the interface structure and the surface crystal binding state of the spherical particles calcium sulfate are changed by the solutions. The bioactivity was significantly improved by the solutions of Na₂SiO₃. With increasing the concentration of solutions in the materials, the degradation rate of the materials is decreased. Si-O network membrane which contains a large amount of Si-OH was formed on the surface of calcium sulfate. Therefore, the degradation rate was decreased and the bioactivity was significantly improved.

• Periodical: Applied Mechanics and Materials (Volume 377)
• Pages: 199-203
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.377.199
• Online since: August 2013
• Authors: Xiao Pei Wu, Wei Bo Zhu, Duan Cheng Wang, Qing Hua Chen
• Keywords: Alveolar Bone, Calcium Sulfate, Sodium Silicate, Spherical Particles

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