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Bioactive glass and glass-ceramic-coated hip endoprosthesis: experimental study in rabbit

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Abstract

Co−Cr−Mo endoprostheses with a dual bioactive glass (BG) coating and titanium implants coated with a bioactive glass-ceramic (BGC) were studied under lead-bearing conditions in the rabbit hip. The dual BG coating contained an inner layer of high durability and an outer bioactive layer. Each type of coating improved the stabilization of prosthesis during the experiment period of 8 weeks compared to non-coated control implants. EDXA analysis confirmed the ability of BG and BGC coatings to bond chemically to bone. The BGC coating on titanium alloy proved superior to the dual BG coating on Co−Cr−Mo prosthesis with regard to bone formation on the surface of the implant. The bioactive top layer of the dual BG coating showed resorption, especially in the areas without direct bone contact. This is explained by partial crystallization of the glass during firing. Thermal discrepancy between BGC coating and titanium core caused cracking of the coating, which remains a major obstacle to its use as a bioactive coating.

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Authors and Affiliations

  1. Department of Clinical Medicine, University of Tampere, Finland

    K. J. J. Pajamäki & T. S. Lindholm

  2. Department of Chemical Engineering, Åbo Akademi University, Finland

    Ö. H. Andersson & K. H. Karlsson

  3. Department of Prosthodontic Dentistry, Institute of Dentistry, University of Turku, Finland

    E. Vedel & A. Yli-Urpo

  4. Department of Oral and Mascillofacial Surgery, Institute of Dentistry, University of Turku, Finland

    R.-P. Happonen

Authors
  1. K. J. J. Pajamäki
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  2. T. S. Lindholm
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  3. Ö. H. Andersson
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  4. K. H. Karlsson
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  5. E. Vedel
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  6. A. Yli-Urpo
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  7. R.-P. Happonen
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Pajamäki, K.J.J., Lindholm, T.S., Andersson, Ö.H. et al. Bioactive glass and glass-ceramic-coated hip endoprosthesis: experimental study in rabbit. J Mater Sci: Mater Med 6, 14–18 (1995). https://doi.org/10.1007/BF00121240

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  • DOI: https://doi.org/10.1007/BF00121240

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