Mechanical and in vitro performance of apatite–wollastonite glass ceramic reinforced hydroxyapatite composite fabricated by 3D-printing |
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Authors: | J Suwanprateeb R Sanngam W Suvannapruk T Panyathanmaporn |
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Affiliation: | (1) National Metal and Materials Technology Center, National Science and Technology Development Agency, Ministry of Science and Technology, 114 Paholyothin Road, Klong 1, Klongluang, Pathumthani, 12120, Thailand |
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Abstract: | In situ hydroxyapatite/apatite–wollastonite glass ceramic composite was fabricated by a three dimensional printing (3DP) technique
and characterized. It was found that the as-fabricated mean green strength of the composite was 1.27 MPa which was sufficient
for general handling. After varying sintering temperatures (1050–1300°C) and times (1–10 h), it was found that sintering at
1300°C for 3 h gave the greatest flexural modulus and strength, 34.10 GPa and 76.82 MPa respectively. This was associated
with a decrease in porosity and increase in densification ability of the composite resulting from liquid phase sintering.
Bioactivity tested by soaking in simulated body fluid (SBF) and In Vitro toxicity studies showed that 3DP hydroxyapatite/A–W
glass ceramic composite was non-toxic and bioactive. A new calcium phosphate layer was observed on the surface of the composite
after soaking in SBF for only 1 day while osteoblast cells were able to attach and attain normal morphology on the surface
of the composite. |
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