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Data associated with 'Sintering of calcium phosphates with a femtosecond pulsed laser for hard tissue engineering'

Anastasiou, Antonios and Jha, Animesh and Mathieson, Robert and Andrew, Brown (2016) Data associated with 'Sintering of calcium phosphates with a femtosecond pulsed laser for hard tissue engineering'. University of Leeds. [Dataset]

Dataset description

Direct laser sintering on hard tissues is likely to open new pathways for personalised medicine. To minimise irradiation damage of the surrounding soft tissues, lasers operating at wavelengths that are ‘safe’ for the tissues and biomaterials with improved optical properties are required. In this work laser sintering is demonstrated with the use of an ultrafast, femtosecond (100 fs) pulsed laser operating at a wavelength of 1045 nm and the optical properties of two existing calcium phosphate minerals (brushite and hydroxyapatite) have been improved after doping with iron (10% mole). Femtosecond laser irradiation caused transformation of the Fe3+-doped brushite and Fe3+-doped HAp samples into β-calcium pyrophosphate and calcium-iron-phosphate, respectively, with simultaneous evidence for microstructural sintering and densification. After estimating the temperature profile at the surface of the samples we suggest that soft tissues over 500 μm from the irradiated zone would be safe from thermal damage. This novel laser processing provides a means to control the phase constitution and the morphology of the finished surfaces. The porous structure of β-pyrophosphate might be suitable for applications in bone regeneration by supporting osteogenic cell activity while, the densified Fe3+-rich calcium-iron-phosphate may be promising for applications like dental enamel restoration.

Keywords: selective laser sintering, femtosecond lasers, heat dissipation, phase transformations, calcium phosphates
Subjects: A000 - Medicine & dentistry > A200 - Pre-clinical dentistry
H000 - Engineering > H100 - General engineering > H160 - Bioengineering, biomedical engineering & clinical engineering
Divisions: Faculty of Engineering and Physical Sciences > School of Chemical and Process Engineering > Institute for Materials Research
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License: Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited: 12 May 2016 16:37



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