Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 38, Issue 16, Pages 5545-5553Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.07.048
Keywords
Calcium phosphate bioceramics; Laser micropatterning; Micro-Raman spectroscopy; Phase transformation; Osteoblastic behaviour
Categories
Funding
- JECS Trust [2015106]
- Walloon Region within the BEWARE program - Wallonia [1510392]
- European Union (FP7 - Marie Curie Actions)
- COST (European Cooperation in Science and Technology)
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The present work is an investigation of the biological response to the presence of grooves 3 mu m deep, 15 mu m wide and spaced by 100 mu m, produced with femtosecond laser on beta-tricalcium phosphate (beta- TCP). The heat affected zone generated by the laser irradiation was investigated. Micro-Raman spectroscopy showed a transformation from beta-TCP phase into alpha-TCP phase, localised inside the grooves. The X Ray Diffraction analyses, correlated with micro-Raman data, confirmed that the use of femtosecond pulsed laser enables to limit the thermal impact. A selection of optimised process parameters allowed to obtain beta-TCP micro-patterned surfaces avoiding any phase transformation. The increase of the wettability with the micro-patterning, compared to smooth surfaces, was highlighted. An improvement of the osteoblastic proliferation was also demonstrated. Finally, the tendency of cell elongation along the grooves direction showed the ability of osteoblastic cells to adapt their morphology to the support topography on which they grow.
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