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A protocol to develop crack-free biomimetic coatings on Ti6Al4V substrates

Published online by Cambridge University Press:  31 January 2011

Sahil Jalota ,
Sutapa Bhaduri ,
Sarit B. Bhaduri  and
A. Cuneyt Tas
Sahil Jalota*
Affiliation:
School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634
Sutapa Bhaduri
Affiliation:
School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634
Sarit B. Bhaduri
Affiliation:
School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634
A. Cuneyt Tas
Affiliation:
Department of Biomedical Engineering, Yeditepe University, Kayisdagi/Kadikoy, Istanbul 34755, Turkey
*
a)Address all correspondence to this author. e-mail: sahil.jalota@gmail.com
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Abstract

Biomimetic coating of titanium and related alloys with carbonated apatitic calcium phosphate is an important area of research in implantology. While this paper specifically refers to coating Ti6Al4V, the results are valid with other related alloys as well. One step in the protocol involves an intermediate alkali treatment of Ti6Al4V to form a sodium titanate layer on the alloy surface. This pretreatment enhances the formation of the coating from simulated body fluid (SBF) solutions. Many papers in the biomimetic coating literature demonstrate the presence of cracks in coatings, irrespective of the SBF compositions and placement of the substrates. The presence of cracks may result in degradation and delamination of coatings. To the best of our knowledge, this issue remains unresolved. Therefore, the aim of this study was: (i) to examine and understand the reasons for cracking and (ii) based on the results, to develop a protocol for producing crack-free apatitic calcium phosphate coatings on Ti6Al4V substrates. In this study, the authors focused their attention on the alkali treatment procedure and the final drying step. It is hypothesized that these two steps of the process affect the crack formation the most. In the first case, the surfaces of alkali-treated substrates were examined with/without water-soaking treatment before immersing in SBF. This water treatment modifies the sodium titanate surface layer. In the second case, two different drying techniques (after soaking in SBF) were used. In one procedure, the coated substrates were dried rapidly, and in the other they were dried slowly. It was observed that the water treatment, irrespective of the drying method, provides a surface, which on subsequent soaking in SBF forms a crack-free apatitic calcium phosphate coating. Based on these results, the authors suggest a protocol incorporating a water-soaking treatment after the alkali treatment and prior to the SBF soaking treatment to obtain crack-free coatings.

Keywords

CeramicCoatingTi
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 6 , June 2007 , pp. 1593 - 1600
Copyright
Copyright © Materials Research Society2007

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References

REFERENCES

1Yan, W-Q., Nakamura, T., Kawanabe, K., Nishigochi, S., Oka, M.Kokubo, T.: Apatite layer-coated titanium for use as bone bonding implants. Biomaterials 18, 1185 1997CrossRefGoogle ScholarPubMed
2Yan, W-Q., Nakamura, T., Kobayashi, M., Kim, H-M., Miyaji, F.Kokubo, T.: Bonding of chemically treated titanium implants to bone. J. Biomed. Mater. Res. 37, 267 19973.0.CO;2-B>CrossRefGoogle ScholarPubMed
3Li, P., Kangasniemi, I., de Groot, K.Kokubo, T.: Bone-like hydroxyapatite induction by a gel-derived titania on a titanium substrate. J. Am. Ceram. Soc. 77, 1307 1994CrossRefGoogle Scholar
4Kokubo, T., Miyaji, F., Kim, H-M.Nakamura, T.: Spontaneous formation of bone-like apatite layer on chemically treated titanium metals. J. Am. Ceram. Soc. 79, 1127 1996CrossRefGoogle Scholar
5Kim, H-M., Miyaji, F., Kokubo, T.Nakamura, T.: Apatite forming ability of alkali-treated Ti metal in body environment. J. Ceram. Soc. Jpn. 105, 111 1997CrossRefGoogle Scholar
6Tas, A.C.Bhaduri, S.B.: Rapid coating of Ti6Al4V at room temperature with a calcium phosphate solution similar to 10× simulated body fluid. J. Mater. Res. 19, 2742 2004CrossRefGoogle Scholar
7Takadama, H., Kim, H-M., Kokubo, T.Nakamura, T.: TEM-EDX study of mechanism of bonelike apatite formation on bioactive titanium metal in simulated body fluid. J. Biomed. Mater. Res. 57, 441 20013.0.CO;2-B>CrossRefGoogle ScholarPubMed
8Jalota, S., Bhaduri, S.B.Tas, A.C.: Effect of carbonate content and buffer used in SBF solutions on calcium phosphate formation on Ti6Al4V. J. Mater. Sci. Mater. Med. 17, 697 2006CrossRefGoogle Scholar
9Kokubo, T.: Surface chemistry of bioactive glass-ceramics J. Non-Cryst. Solids 120, 138 1990CrossRefGoogle Scholar
10Oyane, A., Onuma, K., Ito, A., Kim, H-M., Kokubo, T.Nakamura, T.: Formation and growth of clusters in conventional and new kinds of simulated body fluids. J. Biomed. Mater. Res. 64A, 339 2003CrossRefGoogle Scholar
11Kim, H-M., Kishimoto, K., Miyaji, F., Kokubo, T., Yao, T., Suetsugu, Y., Tanaka, J.Nakamura, T.: Composition and structure of apatite formed on organic polymer in simulated body fluid with a high content of carbonate ion. J. Mater. Sci. Mater. Med. 11, 421 2000CrossRefGoogle ScholarPubMed
12Bayraktar, D.Tas, A.C.: Chemical preparation of carbonated calcium hydroxyapatite powders at 37 °C in urea-containing synthetic body fluids. J. Eur. Ceram. Soc. 19, 2573 1999CrossRefGoogle Scholar
13Tas, A.C.: Synthesis of biomimetic Ca-hydroxyapatite powders at 37 °C in synthetic body fluids. Biomaterials 21, 1429 2000Google ScholarPubMed
14Kim, H-M., Takadama, H., Miyaji, F., Kokubo, T., Nishiguchi, S.Nakamura, T.: Formation of bioactive functionally graded structure on Ti6Al4V alloy by chemical surface treatment. J. Mater. Sci. Mater. Med. 11, 555 2000CrossRefGoogle ScholarPubMed
15Barrere, F., van Blitterswijk, C.A., De Groot, K.Layrolle, P.: Influence of ionic strength and carbonate on the Ca–P coating formation from SBF X 5 solution. Biomaterials 23, 1921 2002CrossRefGoogle Scholar
16Wei, M., Kim, H-M., Kokubo, T.Evans, J.H.: Optimizing the bioactivity of alkaline-treated titanium alloy. Mater. Sci. Eng., C 20, 125 2002CrossRefGoogle Scholar
17Jonasova, L., Muller, F.A., Helebrant, A., Strnad, J.Greil, P.: Hydroxyapatite formation on alkali-treated titanium with different content of Na+ in the surface. Biomaterials 23, 3095 2002CrossRefGoogle Scholar
18Nishiguchi, S., Fujibayashi, S., Kim, H-M., Kokubo, T.Nakamura, T.: Biology of alkali- and heat-treated titanium implants. J. Biomed. Mater. Res. 67A, 26 2003CrossRefGoogle Scholar
19Kokubo, T., Kim, H-M., Kawashita, M.Nakamura, T.: Bioactive metals: Preparation and properties. J. Mater. Sci. Mater. Med. 15, 99 2004CrossRefGoogle ScholarPubMed
20Jonasova, L., Muller, F.A., Helebrant, A., Strnad, J.Greil, P.: Biomimetic apatite formation on chemically treated titanium. Biomaterials 25, 1187 2004CrossRefGoogle ScholarPubMed
21Habibovic, P., Barrère, F., van Blitterswijk, C.A., de Groot, K.Layrolle, P.: Biomimetic hydroxyapatite coating on metal implants. J. Am. Ceram. Soc. 85, 517 2002CrossRefGoogle Scholar
22Bharati, S., Sinha, M.K.Basu, D.: Hydroxyapatite coating by biomimetic method on titanium alloy using concentrated SBF. Bull. Mater. Sci. 28, 617 2005CrossRefGoogle Scholar
23Yin, X.Stott, M.J.: Biological calcium phosphates and Posner’s cluster. J. Chem. Phys. 118, 3717 2003CrossRefGoogle Scholar
24Onuma, K.Ito, A.: Cluster growth model for hydroxyapatite. Chem. Mater. 10, 3346 1998CrossRefGoogle Scholar
25Treboux, G., Layrolle, P., Kanzaki, N., Onuma, K.Ito, A.: Existence of Posner’s cluster in vacuum. J. Phys. Chem. A 104, 5111 2000CrossRefGoogle Scholar
26Gomez-Vega, J.M., Saiz, E., Tomsia, A.P., Oku, T., Suganuma, K., Marshall, G.W.Marshall, S.J.: Novel bioactive functionally graded coatings on Ti6Al4V. Adv. Mater. 12, 894 20003.0.CO;2-4>CrossRefGoogle Scholar
27Uchida, M., Kim, H-M., Kokubo, T., Fujibayashi, S.Nakamura, T.: Effect of water treatment on the apatite-forming ability of NaOH-treated titanium metal. J. Biomed. Mater. Res. 63, 522 2002CrossRefGoogle ScholarPubMed