Effect of surface roughness of hydroxyapatite-coated titanium on the bone-implant interface shear strength

K. Hayashi, T. Inadome, H. Tsumura, Yasuharu Nakashima, Y. Sugioka

研究成果: ジャーナルへの寄稿記事

90 引用 (Scopus)

抄録

We have investigated the bone-implant interface shear strength of hydroxyapatite (HA)-coated Ti-6AI-4V (HA-coating A) (roughness average, Ra = 3.4±0.5 μm) and HA-coated Ti-6AI-4V with a rougher surface (HA-coating B) (Ra = 8.4 ± 1.8 μm). There was no significant difference between HA-coating A and HA-coating B implants with respect to the bone-implant interface shear strength as determined in push-out tests using the transcortical model in adult dogs. The bone-implant interface shear strength of bead-coated porous Ti-6AI-4V was significantly greater than that of both HA-coating A and HA-coating B implants. The failure site, as determined by scanning electron microscopy, was the coating-substrate interface, not the coating-bone interface. This indicates a need to protect the HA coating from the direct shear forces. HA coating enhances early bone growth into the porous surface of the implant. Long-term fixation should depend on bone anchoring to this porous surface. Hydroxyapatite coatings must be developed which do not obstruct the pores of the surface of the implant.

元の言語英語
ページ(範囲)1187-1191
ページ数5
ジャーナルBiomaterials
15
発行部数14
DOI
出版物ステータス出版済み - 1 1 1994

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Shear Strength
Durapatite
Titanium
Hydroxyapatite
Shear strength
Bone
Surface roughness
Coatings
Bone-Implant Interface
Bone and Bones
Bone Development
Electron Scanning Microscopy

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

これを引用

Effect of surface roughness of hydroxyapatite-coated titanium on the bone-implant interface shear strength. / Hayashi, K.; Inadome, T.; Tsumura, H.; Nakashima, Yasuharu; Sugioka, Y.

:: Biomaterials, 巻 15, 番号 14, 01.01.1994, p. 1187-1191.

研究成果: ジャーナルへの寄稿記事

Hayashi, K. ; Inadome, T. ; Tsumura, H. ; Nakashima, Yasuharu ; Sugioka, Y. / Effect of surface roughness of hydroxyapatite-coated titanium on the bone-implant interface shear strength. :: Biomaterials. 1994 ; 巻 15, 番号 14. pp. 1187-1191.
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