Deposition of sol-gel derived hydroxyapatite-titania coatings on ti6al4v alloy used for medical implants
Abstract
Calcium hydroxyapatite (HA) coatings are widely used for modifying of metal implants surface due to their chemical similarity to bone tissue and good biocompatibility to soft tissue. Besides, hydroxyapatite coatings limit toxic influence of metals. However deposition of HA coatings on titanium alloy directly, without any intermediate layer often leads to the formation of micro cracks either directly after deposition or during following implants operation under the influence of mechanical loading. This leads to deterioration of the implants biocompatibility used due to the penetration of ions through the microcracks of the base alloy coating, and as a consequence, decreases the bioactivity of HA coatings. In this paper a new method of deposition of hybrid hydroxyapatite - titania coatings proposed. Scanning electron microscopy and X-ray diffractometry have been used to study morphology and phase structure.
Downloads
References
2. Bioactive Coatings of Glass-Ceramics on Metals / J. Carsten, P. Wange, G. Grimm [et al.] // Glass Sci. Technol. – 1995. – V 68. – P. 117–22.
3. Lange G. L. Interface between Bone Tissue and Implants of Hydroxyapatite or Hydroxyapatite-coated Titanium Implants / G. L. Lange, K. Donath // Biomaterials. – 1999. – V. 10. – P. 121–25.
4. Bone Tissue Reactions to an Electrophoretically Applied Calcium Phosphate Coating / M. Gottlander, C. B. Johansson, A. Wennerberg [et al.] // Biomaterials. – 1997. – V. 18. – P. 551–57.
5. Preparation and characterization of titania/hydroxyapatite composite coatings obtained by sol-gel process / E. Milella, F. Cosentino, A. Licciulli, C. Massaro // Biomaterials. – 2001. – V. 22(11). – P. 1425–1431.
6. Hydroxyapatite and titania sol-gel composite coatings on titanium for hard tissue implants; Mechanical and in vitro biological performance / H.-W. Kim, H.-E. Kim, V. Salih, J. C. Knowles // Journal of Biomedical Materials Research. – 2005. – V. 72B(1). – P. 1–8.
7. Hydroxyapatite coating on titanium substrate with titania buffer layer processed by sol-gel method / H.-W. Kim, Y.-H. Koh, L.-H. Li [et al.] // Biomaterials. – 2004. – V. 25(13). – P. 2533–2538.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
