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

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

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...

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Veröffentlicht in:Journal of materials science. Materials in medicine 1995-01, Vol.6 (1), p.14-18
Hauptverfasser: Pajam ki, K. J. J., Lindholm, T. S., Andersson, . H., Karlsson, K. H., Vedel, E., Yli-Urpo, A., Happonen, R.-P.
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container_issue 1
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container_title Journal of materials science. Materials in medicine
container_volume 6
creator Pajam ki, K. J. J.
Lindholm, T. S.
Andersson, . H.
Karlsson, K. H.
Vedel, E.
Yli-Urpo, A.
Happonen, R.-P.
description 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.
doi_str_mv 10.1007/BF00121240
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title Bioactive glass and glass-ceramic-coated hip endoprosthesis: experimental study in rabbit
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