Enhancement of adhesive strength of hydroxyapatite films on Ti-29Nb-13Ta-4.6Zr by surface morphology control

Junko Hieda; Mitsuo Niinomi; Masaaki Nakai; Ken Cho; Tatsuya Gozawa; Hirokazu Katsui; Rong Tu; Takashi Goto

doi:10.1016/j.jmbbm.2012.11.013

Enhancement of adhesive strength of hydroxyapatite films on Ti-29Nb-13Ta-4.6Zr by surface morphology control

Junko Hieda, Mitsuo Niinomi, Masaaki Nakai, Ken Cho, Tatsuya Gozawa, Hirokazu Katsui, Rong Tu, Takashi Goto

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Hydroxyapatite (HAp) films were deposited on a Β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr (TNTZ), by metal organic chemical vapor deposition (MOCVD) in order to improve its hard-tissue compatibility. The surface morphologies of TNTZ substrates were changed by acid treatments and mechanical polishing prior to the HAp film deposition. The adhesive strength of the HAp films formed on TNTZ substrates treated with an HF solution increased to twice that of the HAp film deposited on a TNTZ substrate with a mirror-like finish. Complex microstructures with deeply etched grain boundaries, formed on the TNTZ substrates after immersion in the HF solution, were responsible for the increase in the adhesive strength of the HAp film caused by an interlocking effect. The HAp films on TNTZ substrates treated with a H₂SO₄ solution exhibited lower adhesive strength than HAp films on TNTZ substrates treated with HF solution, regardless of the surface roughness of the substrates. Additionally, acid treatments using HNO₃ and H₂O₂ solutions did not change the surface morphologies of the TNTZ substrates. The complex microstructures with deeply etched grain boundaries and nanosized asperities formed on the TNTZ substrates are important factors in the improvement of the adhesive strengths of HAp films deposited on TNTZ substrates.

Original language	English
Pages (from-to)	232-239
Number of pages	8
Journal	Journal of the Mechanical Behavior of Biomedical Materials
Volume	18
DOIs	https://doi.org/10.1016/j.jmbbm.2012.11.013
Publication status	Published - 2013 Feb

Keywords

Acid treatment
Adhesive strength
Hydroxyapatite film
Surface morphology
Β-type titanium alloy

ASJC Scopus subject areas

Biomaterials
Biomedical Engineering
Mechanics of Materials

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10.1016/j.jmbbm.2012.11.013

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Enhancement of adhesive strength of hydroxyapatite films on Ti-29Nb-13Ta-4.6Zr by surface morphology control. / Hieda, Junko; Niinomi, Mitsuo; Nakai, Masaaki; Cho, Ken; Gozawa, Tatsuya; Katsui, Hirokazu; Tu, Rong; Goto, Takashi.

In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 18, 02.2013, p. 232-239.

Research output: Contribution to journal › Article › peer-review

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title = "Enhancement of adhesive strength of hydroxyapatite films on Ti-29Nb-13Ta-4.6Zr by surface morphology control",

abstract = "Hydroxyapatite (HAp) films were deposited on a Β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr (TNTZ), by metal organic chemical vapor deposition (MOCVD) in order to improve its hard-tissue compatibility. The surface morphologies of TNTZ substrates were changed by acid treatments and mechanical polishing prior to the HAp film deposition. The adhesive strength of the HAp films formed on TNTZ substrates treated with an HF solution increased to twice that of the HAp film deposited on a TNTZ substrate with a mirror-like finish. Complex microstructures with deeply etched grain boundaries, formed on the TNTZ substrates after immersion in the HF solution, were responsible for the increase in the adhesive strength of the HAp film caused by an interlocking effect. The HAp films on TNTZ substrates treated with a H2SO4 solution exhibited lower adhesive strength than HAp films on TNTZ substrates treated with HF solution, regardless of the surface roughness of the substrates. Additionally, acid treatments using HNO3 and H2O2 solutions did not change the surface morphologies of the TNTZ substrates. The complex microstructures with deeply etched grain boundaries and nanosized asperities formed on the TNTZ substrates are important factors in the improvement of the adhesive strengths of HAp films deposited on TNTZ substrates.",

keywords = "Acid treatment, Adhesive strength, Hydroxyapatite film, Surface morphology, Β-type titanium alloy",

author = "Junko Hieda and Mitsuo Niinomi and Masaaki Nakai and Ken Cho and Tatsuya Gozawa and Hirokazu Katsui and Rong Tu and Takashi Goto",

note = "Funding Information: This study was supported in part by a Grant-in-aid for Scientific Research from the Japan Society for the Promotion of Science ( /♯24246111 ), ( /♯24656401 ) and the Global COE program “Materials Integration International Center of Education and Research, Tohoku University” , Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan; the Tohoku Leading Women's JUMP UP Project, Tohoku University; the interuniversity cooperative research program “Innovative Research for Biosis-Abiosis Intelligent Interface”, MEXT; and the cooperative research program of the Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University.",

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AU - Cho, Ken

AU - Gozawa, Tatsuya

AU - Katsui, Hirokazu

AU - Tu, Rong

AU - Goto, Takashi

N1 - Funding Information: This study was supported in part by a Grant-in-aid for Scientific Research from the Japan Society for the Promotion of Science ( /♯24246111 ), ( /♯24656401 ) and the Global COE program “Materials Integration International Center of Education and Research, Tohoku University” , Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan; the Tohoku Leading Women's JUMP UP Project, Tohoku University; the interuniversity cooperative research program “Innovative Research for Biosis-Abiosis Intelligent Interface”, MEXT; and the cooperative research program of the Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University.

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N2 - Hydroxyapatite (HAp) films were deposited on a Β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr (TNTZ), by metal organic chemical vapor deposition (MOCVD) in order to improve its hard-tissue compatibility. The surface morphologies of TNTZ substrates were changed by acid treatments and mechanical polishing prior to the HAp film deposition. The adhesive strength of the HAp films formed on TNTZ substrates treated with an HF solution increased to twice that of the HAp film deposited on a TNTZ substrate with a mirror-like finish. Complex microstructures with deeply etched grain boundaries, formed on the TNTZ substrates after immersion in the HF solution, were responsible for the increase in the adhesive strength of the HAp film caused by an interlocking effect. The HAp films on TNTZ substrates treated with a H2SO4 solution exhibited lower adhesive strength than HAp films on TNTZ substrates treated with HF solution, regardless of the surface roughness of the substrates. Additionally, acid treatments using HNO3 and H2O2 solutions did not change the surface morphologies of the TNTZ substrates. The complex microstructures with deeply etched grain boundaries and nanosized asperities formed on the TNTZ substrates are important factors in the improvement of the adhesive strengths of HAp films deposited on TNTZ substrates.

AB - Hydroxyapatite (HAp) films were deposited on a Β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr (TNTZ), by metal organic chemical vapor deposition (MOCVD) in order to improve its hard-tissue compatibility. The surface morphologies of TNTZ substrates were changed by acid treatments and mechanical polishing prior to the HAp film deposition. The adhesive strength of the HAp films formed on TNTZ substrates treated with an HF solution increased to twice that of the HAp film deposited on a TNTZ substrate with a mirror-like finish. Complex microstructures with deeply etched grain boundaries, formed on the TNTZ substrates after immersion in the HF solution, were responsible for the increase in the adhesive strength of the HAp film caused by an interlocking effect. The HAp films on TNTZ substrates treated with a H2SO4 solution exhibited lower adhesive strength than HAp films on TNTZ substrates treated with HF solution, regardless of the surface roughness of the substrates. Additionally, acid treatments using HNO3 and H2O2 solutions did not change the surface morphologies of the TNTZ substrates. The complex microstructures with deeply etched grain boundaries and nanosized asperities formed on the TNTZ substrates are important factors in the improvement of the adhesive strengths of HAp films deposited on TNTZ substrates.

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KW - Hydroxyapatite film

KW - Surface morphology

KW - Β-type titanium alloy

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JO - Journal of the Mechanical Behavior of Biomedical Materials

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SN - 1751-6161

ER -

Enhancement of adhesive strength of hydroxyapatite films on Ti-29Nb-13Ta-4.6Zr by surface morphology control

Abstract

Keywords

ASJC Scopus subject areas

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