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Evaluating the effect of increasing ceramic content on the mechanical properties, material microstructure and degradation of selective laser sintered PCL/b-TCP materials

Authors: Doyle, Heather; Lohfeld, Stefan; McHugh, Peter E.;

Evaluating the effect of increasing ceramic content on the mechanical properties, material microstructure and degradation of selective laser sintered PCL/b-TCP materials

Abstract

Orthopaedic scaffold materials were fabricated from polycaprolactone (PCL) and composite PCL‐β‐tricalcium phosphate (PCL/β‐TCP) powders using selective laser sintering (SLS). Incorporating β‐TCP particles is desirable to promote osteogenesis. The effects of increasing β‐TCP content on the material’s mechanical properties and microstructure were evaluated. The wt% of β‐TCP and PCL particle sizes were found to influence material microstructure and mechanical properties, with increasing ceramic content causing a small but significant increase in stiffness but significant reductions in strength. Degradation of materials was achieved using accelerated ageing methods. The influence of β‐TCP content on degradation at seven weeks was evaluated through changes in mechanical properties and microstructure, and the ceramic particles were found to reduce elastic modulus and increase strength. The results of this study highlight the influence of ceramic content on mechanical properties and degradation behaviour of PCL/β‐TCP SLS materials, and indicate that these changes must be considered in the design of scaffolds for critical‐sized defects.

Country
Ireland
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Keywords

Polycaprolactone, β-Tricalcium phosphate, Degradation, Selective laser sintering, Biomedical Engineering, FOS: Mechanical engineering, Mechanical properties, Biomedical engineering, Mechanical engineering, Bone tissue engineering, Accelerated ageing

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green