Bioactive glasses are more promising than biopolymers in fabricating scaffolds for bone tissue repair because they convert to hydroxyapatite, when implanted in vivo. Both direct and indirect selective laser sintering (SLS) methods of 13-93 bioactive glass were considered in this research to study the feasibility of fabricating scaffolds for bone repair applications. Stearic acid was used as the binder in the indirect method to fabricate the scaffolds. The green scaffolds underwent binder burnout and sintering at various soaking conditions between 675⁰C and 700⁰C, achieving a maximum compressive strength of 23.6 MPa, which is higher than that of the human cancellous bone. The sintered scaffolds had a pore size varying between 300 μm and 800 μm with 50% apparent porosity.
K. C. Kolan et al., "Selective Laser Sintering of 13-93 Bioactive Glass," Proceedings of the 21st Annual International Solid Freeform Fabrication Symposium (2010, Austin, TX), pp. 504-512, University of Texas at Austin, Aug 2010.
21st Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2010: Aug. 9-11, Austin, TX)
Mechanical and Aerospace Engineering
Materials Science and Engineering
Keywords and Phrases
3D printers; Binders; Biopolymers; Compressive strength; Laser heating; Manufacture; Scaffolds; Scaffolds (biology); Sintering; Apparent porosity; Bone repair; Bone tissue; Cancellous bone; Indirect methods; Maximum compressive strengths; Selective laser sintering; Soaking conditions; Bioactive glass
Article - Conference proceedings
11 Aug 2010