Researches Concerning the Phenomena at the Interface for the Sintered Compacts of Titan-Hydroxyapatite

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Abstract:

The behaviour of metallic powders is very important for manufacturing parts and for realize the prototypes. Manufacturing of the orthopaedic implants by selective laser sintering process can be used in medicine. The powders necessary for SLS process are biomaterials who must assure a good osteointegration of endobone implants like the Ti powder (Ti-6Al-4V) and the hydroxyapatite powder. The conditioned powders is a very important process and is necessary in SLS to obtain medical prothesis and influence the final properties of prothesis. Materials must present a gradient for porosity and one for composition (presents of a bioactive phase in titan matrix). The exterior porosity, in the contact zones with the bone tissue, favors the incipient cellular processes (the adhesion and attachment of osteoblastes, proliferation and cellular differentiation and nucleation of mineral bone). The pores must be open and with a specific surface more great. Its preferred the exterior intercommunicating porosity. The presence of phosphates of calcium in the contact zone of the implant with bone favors the mineral kernel on bone. The report Ca/P of phosphates mineral bone has an ascending evolution towards 10/6 according to hydroxyapatite.

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164-168

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December 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] D. Ratner Buddy, S. Hoffman, F. Schoen, J. Lemons, Biomaterials Science, An introduction to materials in medicine, Academic Press, (1996).

Google Scholar

[2] P. Berce, M. Ancau, N. Balc, C. Caizer, S. Comsa, H. Chezan, Rapid Prototyping Manufacturing, Editura Tehnica, Bucharest 2000, pg. 20-30.

Google Scholar

[3] W. Schatt, K.P. Wieters, Powder Metallurgy – Processing and materials EPMA, (1997).

Google Scholar

[4] N. Patel, S.M. Best, I.R. Gibson, K.A. Bonfield, Preparation and characterization of hydroxiapatite and carbonate substituted hydroxyapatite granules, Bioceramics 13, pg 192-195, (2001).

DOI: 10.4028/www.scientific.net/kem.192-195.7

Google Scholar

[5] E. Bouyer, F. Gitzhofer, F. Boulos, Suspension Plasma Spraying for Hydroxyapatite Powder Preparation by RF Plasma, IEEE Transactions on Plasma Science, (1997).

DOI: 10.1109/27.649627

Google Scholar