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Characterisation of bioactive glass coatings on titanium substrates produced using a CO2 laser

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Abstract

Titanium and its alloys are widely used in load-bearing bioinert implants. Bioactive glasses (BAGs) form a chemical bond with bone, but they are not suitable for load-bearing applications. Creating a BAG coating on a titanium implant could combine the best properties of both materials. The results tend to be poor when conventional firing methods are applied to coat titanium with BAG. A local application of heat to melt the glass can be achieved by a CO2 laser. A new method is introduced to create BAG coatings on titanium locally in a controlled manner, with a focused CO2 laser beam. The coatings produced by this method precipitate calcium phosphate in vitro. Processing parameters (number of coated layers, laser power, and processing atmosphere) providing a firm attachment of the glass and good in vitro bioactivity were identified. XRD analysis showed no crystallisation of the glass due to processing with the laser. EDXA indicated the formation of a calcium phosphate layer, which FTIR suggested to be a hydroxyapatite. The results show CO2 laser processing to be a promising technique for the manufacture of 30–40 μm BAG coatings on titanium.

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Authors and Affiliations

  1. Institute of Dentistry/Biomaterials Research, Finland

    N. Moritz, M. Jokinen & A. Yli-Urpo

  2. Turku Centre for Biomaterials, University of Turku, Itäinen Pitkäkatu 4B, FIN-20520, Turku, Finland

    N. Moritz & M. Jokinen

  3. Process Chemistry Group, aring;bo Akademi University, Piispankatu 8, FIN-20500, Turku, Finland

    E. Vedel, H. Ylänen & M. Hupa

Authors
  1. N. Moritz
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  2. E. Vedel
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  3. H. Ylänen
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  4. M. Jokinen
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  5. M. Hupa
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  6. A. Yli-Urpo
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Correspondence to N. Moritz.

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Moritz, N., Vedel, E., Ylänen, H. et al. Characterisation of bioactive glass coatings on titanium substrates produced using a CO2 laser. Journal of Materials Science: Materials in Medicine 15, 787–794 (2004). https://doi.org/10.1023/B:JMSM.0000032819.64994.42

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  • DOI: https://doi.org/10.1023/B:JMSM.0000032819.64994.42

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