Bioactive glass/polymer composite materials with mechanical properties matching those of cortical bone

Journal of Biomedical Materials Research. Part a
Veronika A KoleganovaAmin S Rizkalla

Abstract

Stress shielding resulting from mismatch in dynamic mechanical properties contributes to the reduced stability of osseous implants. Our objective was to develop biocompatible composites having mechanical properties similar to those of cortical bone. Polymers of urethane dimethacrylate (UDMA) and 2-hydroxyethyl methacrylate (HEMA, 0-20%) and composites containing bioactive glass particles (70% SiO(2), 25% CaO, and 5% P(2)O(5)), with or without silane treatment were prepared. Young's moduli of composites containing silane-treated glass (16 GPa) were significantly greater than those of composites containing untreated glass (12-13 GPa) or of unfilled polymers (5-6 GPa). Bioactive glass reduced water sorption by the composites and incorporation of silane-treated glass prevented HEMA-induced increases in water sorption. Osteoblast-like cells attached equally well to UDMA polymer and composite containing silane-treated bioactive glass. Thus, silane treatment improved the mechanical properties of bioactive glass composites without compromising biocompatibility. This material has a Young's modulus comparable to that of cortical bone. Therefore, silane-treated bioactive glass composites, when used as implant or cement materials, would re...Continue Reading

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Citations

Jan 31, 2012·Journal of Materials Science. Materials in Medicine·Ana C MendesRui L Reis
Apr 17, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Selma A SaadaldinAmin S Rizkalla
May 3, 2016·Medical Engineering & Physics·Julia KulkovaPekka K Vallittu
Nov 1, 2018·Frontiers of Medicine·Bo LeiPeter X Ma
Jan 30, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Leonie DeilmannDominik Eder

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