Apatite formation on CO2 laser irradiated titanium oxide films

Ghaith, El-Sayed; Hayakawa, Tomokatsu; Kasuga, Toshihiro; Nogami, Masayuki

doi:10.1016/j.matlet.2005.08.030

Cited by 10 publications

(11 citation statements)

References 24 publications

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“…Moritz et al reported that CO2 laser treatment induced the formation of calcium phosphate locally on TiO2 coatings on titanium. 6) Ghaith et al also confirmed the effectiveness of laser irradiations (CO2 laser 7) or the Nd:YAG laser 8) ) on apatite formation on TiO2 films derived from the sol-gel method. These laser treatments promoted the crystallization of TiO2 (e.g.…”

Section: Introductionmentioning

confidence: 89%

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Enhancement of in vitro apatite-forming ability of thermally oxidized titanium surfaces by ultraviolet irradiation

Shozui

Tsuru

Hayakawa

et al. 2008

J. Ceram. Soc. Japan

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Ultraviolet (UV) light was irradiated in air for 1 h on titania (rutile) films prepared by thermal oxidation of titanium substrates from 300°C up to 800°C, coded as HT300UV, HT400UV, HT500UV, HT600UV, HT700UV, and HT800UV, respectively. All samples were then soaked in a simulated body fluid (SBF, Kokubo solution) and their in vitro apatite-forming ability was evaluated. It was found that bone-like apatite particles were deposited on HT500UV, HT600UV, and HT700UV within 7 d whereas that was not the case with others during the same period. Moreover, the apatite particles were deposited more on HT500UV than on the others. Therefore, the ultraviolet light irradiation enhanced the in vitro apatite-forming ability of the thermally oxidized titanium.

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Section: Introductionmentioning

confidence: 89%

“…These laser treatments promoted the crystallization of TiO2 (e.g. from amorphous kinds to anatase 7) and to rutile 8) ). Moreover, they also changed the submicron-scale surface topography and morphology.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of in vitro apatite-forming ability of thermally oxidized titanium surfaces by ultraviolet irradiation

Shozui

Tsuru

Hayakawa

et al. 2008

J. Ceram. Soc. Japan

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“…Ti peaks are shown due to the deposition (crystallisation) of titanium oxide. These results suggest that the metal surface was fused due to the thermal effect of the laser power; the titania sol appears to be crystallised and blended with hydroxyapatite to form apatie-TiO 2 spheres which are embedded into the metal surface matrix [6][7][8][9][10][11][12][13]17]. This indicates that the laser energy density plays the major role for the deposited coating thickness.…”

Section: Surface Morphologymentioning

confidence: 96%

“…The titania sol was obtained by hydrolysis of titanium (IV) n-butoxide with water at room temperature in the presence of acetyl acetone as a chelating agent and ethanol as a solvent. The molar ratio was maintained at a ratio of 1:1:26.5:1 titanium (IV) n-butoxide:acetyl acetone:ethanol:water [7].…”

Section: Sample Preparationmentioning

confidence: 99%

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Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite–titanium oxide composite

Ghaith

Hodgson

Sharp

2015

J Mater Sci: Mater Med

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Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite-titanium oxide composite. Abstract: Laser surface alloying (LSA) is a powerful technique for improving the mechanical and chemical properties of engineering components. In this study, Laser surface irradiation process employed in the surface modification off 316 L stainless steel substrate using hydroxyapatite-titanium oxide to provide a composite ceramic layer for the suitability of applying this technology to improve the biocompatibility of medical alloys and implants. Fusion of the metal surface incorporating hydroxyapatite-titania ceramic particles using a 30 W Nd:YAG laser at different laser powers, 40 %, 50% and 70 % power and a scan speed of 40 mms-1 was observed to adopt the optimum condition of ceramic deposition. Coatings were evaluated in terms of microstructure, surface morphology, composition biocompatibility using XRD, ATR-FTIR, SEM and EDS. Evaluation of the in vitro bioactivity by soaking the treated metal in SBF for 10 days showed the deposition of biomimetic apatite.Response to Reviewers: All fingers comments have been done. Thank you Powered by Editorial Manager® and ProduXion Manager® from Aries Systems CorporationLaser surface alloying of 316 L stainless steel coated with a bioactive hydroxyapatite-titanium oxide composite AbstractLaser surface alloying (LSA) is a powerful technique for improving the mechanical and chemicalproperties of engineering components. In this study, Laser surface irradiation process employed in the surface modification off 316 L stainless steel substrate using hydroxyapatite-titanium oxide to provide a composite ceramic layer for the suitability of applying this technology to improve the biocompatibility of medical alloys and implants. Fusion of the metal surface incorporating hydroxyapatite-titania ceramic particles using a 30 W Nd:YAG laser at different laser powers, 40 %, 50% and 70 % power and a scan speed of 40 mms -1 was observed to adopt the optimum condition of ceramic deposition. Coatings were evaluated in terms of microstructure, surface morphology, composition biocompatibility using XRD, ATR-FTIR, SEM and EDS. Evaluation of the in vitro bioactivity by soaking the treated metal in SBF for 10 days showed the deposition of biomimetic apatite.

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