Characteristics and osteoconductivity of three different plasma-sprayed hydroxyapatite coatings
Surface and Coatings Technology, ISSN: 0257-8972, Vol: 58, Issue: 2, Page: 107-117
1993
- 65Citations
- 11Captures
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Article Description
Plasma-sprayed hydroxyapatite coating (HAC) on a bioinert metal substrate was used clinically to increase the fixation of an orthopaedic implant. This study aimed to clarify in vitro various characteristics of plasma-sprayed HACs, and to evaluate in vivo the effect of coating characteristics on the osteoconductivity of HACs. Three different HACs on Ti-6A1-4V substrate were prepared by varying the plasma spraying parameters; these were then characterized in detail. Subsequently, in the cortex of canine femur, a quantitative histologic evaluation was performed. This was done to determine the osteoconductivity of HACs, represented as the new bone healing index (NBHI), after 2, 4, 6, and 12 weeks of implantation. The results in vitro demonstrated that the microstructure, phase composition, crystallinity, OH-ion content, and calcium to phosphorus molar ratio of the HACs varied with the spraying parameters. The HAC with denser microstructure and less thickness showed a higher bonding strength at the HAC-Ti-6A1-4V interface. However, this denser HAC underwent adverse biological degration in terms of NBHI after 12 weeks of implantation because of other characteristics of the coating. Based on the results of the study, it can be concluded that an HAC with both high bonding strength and good osteoconductivity is difficult to acheive.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/025789729390181M; http://dx.doi.org/10.1016/0257-8972(93)90181-m; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0027907765&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/025789729390181M; http://linkinghub.elsevier.com/retrieve/pii/025789729390181M; http://api.elsevier.com/content/article/PII:025789729390181M?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:025789729390181M?httpAccept=text/plain; http://dx.doi.org/10.1016/0257-8972%2893%2990181-m; https://dx.doi.org/10.1016/0257-8972%2893%2990181-m
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