Preparation and Bioactive Characteristics of Porous Borate Glass Substrates


Whereas silicate-based bioactive glasses and glass-ceramics have been widely investigates for bone repair or as scaffolds for cell-based bone tissue engineering, recent data have demonstrated that silica-free borate glasses also exhibit bioactive behavior. The objectives of this study were to fabricate porous, three-dimensional substrates by in vitro cell culture with human mesenchymal stem cells (hMSCs) and hMSC-derived osteoblasts (hMSC-Obs).Borate glass particles with sizes 212-355 µm were loosely compacted and then sintered at 600⁰C to form porous disc-shaped substrates (porosity ≈40%).Partial or nearly complete conversion of the glass substrates to a calcium phosphate(Ca-P) material was achieved by soaking the substrates for 1 day or 7 days in a 0.25 molar K2HPO4 solution at 37⁰C and at pH of 9.0. Bone marrow derived hMSC-Obs markedly synthesized alkaline phosphatase, an early osteogenic marker. These data indicate strong bioactive characteristics for the borate glass constructs and the potential use of the constructs for bone tissue engineering.

Meeting Name

29th International Conference on Advanced Ceramics and Composites (2005: Jan. 23-28, Cocoa Beach, FL)


Materials Science and Engineering


National Institutes of Health (U.S.)
University of Illinois at Chicago
University of Illinois at Urbana-Champaign
University of Missouri Research Board
Whitaker Foundation


Book Series:Ceramic Engineering and Science Proceedings

International Standard Book Number (ISBN)

978-1574982367; 978-0470291269

Document Type

Article - Conference proceedings

Document Version


File Type





© 2005 American Ceramic Society, All rights reserved.

Publication Date

01 Jan 2005