Study on bioactivity of NiTinol after surface treatment

• Autorzy: Chrzanowski A. , Walke W. , Armitage D. , Knowles J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the work was to assess bioactive properties and corrosion resistance of nickel titanium alloy after alkali treatment and spark oxidation in Hank’s Balance Salt Solution. Design/methodology/approach: Surfaces of samples were prepared by chemical treatment in NaOH followed by heat treatment, and spark oxidation. Corrosion resistance was investigated using potentiodynamic method. Chemical composition of the samples surface was measured using SEM EDX. Surface roughness and topography was analyzed using AFM. Bioactive properties were analyses on the basis of the chemical composition of the samples immersed in HBSS for 14 days. Findings: The chemical composition analysis of the samples showed that alkali treatment increased significantly nickel content in top layer and also increase in roughness was observed. Spark oxidation results also in roughness increase. Corrosion test showed insignificant increase of the corrosion resistance after oxidation while alkali treatment caused drop of the resistance. Bioactivity study revealed that both applied treatments did not improve bioactive properties of the NiTinol when compared with simply ground samples. Research limitations/implications: Two types of the treatment applied for nickel titanium and intended to improve bioactive properties were investigated. There was no improvement in bioactivity observed after surface treatment. However, alternation in chemical composition, corrosion resistance, and topography were observed. Further analysis of biocompatibility and mechanical properties are required. Practical implications: Both chemical and electrochemical treatment, as presented in the paper, gave promising results in terms of wetting ability, topography and apatite film formation, however further study are required to confirm suitability of the treatments for medical applications. Originality/value: The obtained results revealed unsuitability of the alkali treatment intended to improve bioactivity of the Nitinol. Nevertheless, obtained results for spark oxidised samples were found promising in terms of the chemistry and topography and further biological studies are planned.

Słowa kluczowe

EN

nickel titanium; spark oxidation; bioactivity; AFM; XPS; corrosion resistance

PL

utlenianie iskrowe; AFM; XPS; odporność korozyjna

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 31, nr 1
• Strony: 5--8
• Opis fizyczny: Bibliogr. 21 poz.

Twórcy

autor

Chrzanowski A.

autor

Walke W.

autor

Armitage D.

autor

Knowles J.

• Division of Biomedical Engineering, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] R.D. Barrett, S.E. Bishara, J.K. Quinn, Biodegradation of Orthodontic Appliances. 1. Biodegradation of Nickel and Chromium Invitro, American Journal of Orthodontics and Dentofacial Orthopedics 103/1 (1993) 8-14.
• [2] Y. Cheng, Y.F. Zheng, Deposition of TiN coatings on shape memory NiTi alloy by plasma immersion ion implantation and deposition, Thin Solid Films 515/4 (2006) 1358-1363.
• [3] Y. Cheng, Y.F. Zheng, Surface characterization and electrochemical studies of biomedical NiTi alloy coated with TiN by PIIID, Materials Science and Engineering A (2006) 438-440.
• [4] B. Grosgogeat, E. Jablonska, J.M. Vernet, N. Jaffrezic, M. Lissac, L. Ponsonnet, Tribological response of sterilized and un-sterilized orthodontic wires, Materials Science and Engineering C 26/2-3 (2006) 267-272.
• [5] S. Kobayashi, Y. Ohgoe, K. Ozeki, K. Sato, T. Sumiya, K.K. Hirakuri et al., Diamond-like carbon coatings on orthodontic archwires, Diamond and Related Materials 14/3-7 (2005) 1094-1097.
• [6] J.W. Wang, N.X. Li, G.B. Rao, E.H. Han, W. Ke, Stress corrosion cracking of NiTi in artificial saliva, Dental Materials 23/2 (2007) 133-137.
• [7] Z.D. Cui, M.F. Chen, L.Y. Zhang, R.X. Hu, S.L. Zhu, X.J. Yang, Improving the biocompatibility of NiTi alloy by chemical treatments: An in vitro evaluation in 3T3 human fibroblast cell, Materials Science and Engineering C (in press).
• [8] S.D. Plant, D.M. Grant, L. Leach, Behaviour of human endothelial cells on surface modified NiTi alloy, Biomaterials 26/26 (2005) 5359-5367.
• [9] N. Shevchenko, M.T. Pham, M.F. Maitz, Studies of surface modified NiTi alloy, Applied Surface Science 235/1-2 (2004) 126-131.
• [10] C. Wirth, B. Grosgogeat, C. Lagneau, N. Jaffrezic-Renault, L. Ponsonnet, Biomaterial surface properties modulate in vitro rat calvaria osteoblasts response: Roughness and or chemistry?, Materials Science and Engineering C (in press).
• [11] K.W.K. Yeung, R.W.Y. Poon, X.M.Liu, P.K. Chu, C.Y. Chung, X.Y. Liu et al, Nitrogen plasma-implanted nickel titanium alloys for orthopedic use, Surface and Coatings Technology 201/9-11 (2007) 5607-5612.
• [12] J. Marciniak, W. Chrzanowski, Z. Paszenda, J. Szade, W. Wniarski, Carbon layers on the Ti6Al7Nb implants surface, Biomaterials Engineering 46 (2007) 12-15.
• [13] J. Marciniak, W. Chrzanowski, J. Zak, B. Rajchel, Structure modification of surface layers of Ti6Al4V ELI implants, Key Engineering Materials 254-256 (2007) 387-390.
• [14] W. Chrzanowski, E. Abou Neel, D. Armitage, J. Knowles, Surface preparation of bioactive Ni-Ti alloy using alkali, thermal treatments and spark oxidation, Journal of Materials Science: Materials in Medicine 19/4 (2008) 1553-1557.
• [15] Y.W. Gu, B.Y. Tay, C.S. Lim, M.S. Yong, Characterization of bioactive surface oxidation layer on NiTi alloy, Applied Surface Science 252/5 (2005) 2038-2049.
• [16] B. O'Brien, W.M. Carroll, M.J. Kelly, Passivation of nitinol wire for vascular implants - a demonstration of the benefits, Biomaterials 23 (2002) 1739-1748.
• [17] C.L. Chu, C.Y. Chung, J. Zhou, Y.P. Pu, P.H. Lin, Fabrication and characteristics of bioactive sodium titanate/titania graded film on NiTi shape memory alloy. Journal of Biomedical Materials Research A 75/3 (2005) 595-602.
• [18] D.J. Waver, A.G. Veldhuizen, J.d Vereis, H.J. Busscher, D.R.A. Ugas, J.R. Horn, Electrochemical and surface characterization of nickel-titanium alloy, Biomaterials 19 (1998) 761-769.
• [19] W. Chrzanowski. Corrosion behavior of Ti6Al7Nb alloy after different surface treatments, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 67-71.
• [20] T. Kokubo Apatite formation on surfaces of ceramics, metals and polymers in body environment, Acta Materialia 46/7 (1998) 2519-2527.
• [21] D.A. Armitage, W. Chrzanowski. Surface preparation of Ni-Ti alloy using alkali, thermal treatments and spark oxidation, Proceedings of European Society for Biomaterials 2007.