Publications in Scientific Journals:

R. Gmeiner, G. Mitteramskogler, J. Stampfl, A. Boccaccini:
"Stereolithographic Ceramic Manufacturing of High Strength Bioactive Glass";
International Journal of Applied Ceramic Technology, 12 (2015), 1; 38 - 45.

English abstract:
Bioactive glasses and glass ceramics like the 45S5 formulation have been studied toward biocompatibility and biodegradability
for years. Nevertheless, clinical applications as bone substitute or scaffold material are highly limited because of the often poor
mechanical behavior of bioactive glasses. In this study, we are able to provide a new production alternative for 45S5 bioactive
glass structures resulting in parts with high density and strength. Using the stereolithographic ceramic manufacturing (SLCM)
process, it is possible to additively produce solid bulk glass ceramics as well as delicate scaffold structures. Recent developments
in SLCM slurry preparation together with an appropriate selection of raw materials led to 3D parts with a very homogeneous
microstructure and a density of about 2.7 g/cm³. Due to the low number and small size of defects, a high biaxial bending
strength of 124 MPa was achieved. Weibull distribution also underlines good process control showing a Weibull modulus of 8.6
and a characteristic strength of 131 MPa for the samples tested here. By reaching bending strength values of natural cortical
bone, bioactive glasses processed with SLCM could eventually advance to be an interesting bone substitute material even in loadbearing
applications, valuing the huge efforts undertaken to understand their bioactive behavior.

stereolithography, additive manufacturing, bioglass, 45S5, bioactive glass ceramic, SLCM, bioactive glass, biodegradable

"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)

Created from the Publication Database of the Vienna University of Technology.