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.

Meeting Name

21st Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2010: Aug. 9-11, Austin, TX)


Mechanical and Aerospace Engineering

Second Department

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

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type




Publication Date

11 Aug 2010