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Preparation and analysis of chemically gradient functional bioceramic coating formed by pulsed laser deposition

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Abstract

Bioactive ceramic coatings based on calcium phosphates yield better functionality in the human body for a variety of metallic implant devices including orthopaedic and dental prostheses. In the present study chemically and hence functionally gradient bioceramic coating was obtained by pulsed laser deposition method. Calcium phosphate bioactive ceramic coatings based on hydroxyapatite (HA) and tricalcium phosphate (TCP) were deposited over titanium substrate to produce gradation in physico-chemical characteristics and in vitro dissolution behaviour. Sintered targets of HA and α-TCP were deposited in a multi target laser deposition system. The obtained deposits were characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray analysis. Inductively coupled plasma spectroscopy was used to estimate the in vitro dissolution behaviour of coatings. The variation in mechanical property of the gradient layer was evaluated through scratch test and micro-indentation hardness. The bioactivity was examined in vitro with respect to the ability of HA layer to form on the surface as a result of contact with simulated body fluid. It could be inferred that chemically gradient functional bioceramic coating can be produced by laser deposition of multiple sintered targets with variable chemical composition.

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Acknowledgments

The authors gratefully acknowledge The Director and Head, Biomedical Technology Wing, SCTIMST for extending the research facilities to successfully carry out this work. Rajesh P acknowledges Kerala State Council for Science Technology and Environment (KSCSTE) for the research fellowship.

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Authors and Affiliations

  1. Bioceramics Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Trivandrum, 695012, Kerala, India

    P. Rajesh, S. Sureshbabu, Manoj Komath & Harikrishna Varma

  2. Division of Artificial Internal Organs, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Trivandrum, 695012, Kerala, India

    C. V. Muraleedharan

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  1. P. Rajesh
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  2. C. V. Muraleedharan
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  3. S. Sureshbabu
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  4. Manoj Komath
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  5. Harikrishna Varma
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Correspondence to Harikrishna Varma.

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Rajesh, P., Muraleedharan, C.V., Sureshbabu, S. et al. Preparation and analysis of chemically gradient functional bioceramic coating formed by pulsed laser deposition. J Mater Sci: Mater Med 23, 339–348 (2012). https://doi.org/10.1007/s10856-011-4501-6

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  • DOI: https://doi.org/10.1007/s10856-011-4501-6

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