Effect of hot water and heat treatment on the apatite-forming ability of titania films formed on titanium metal via anodic oxidation in acetic acid solutions

Cui, Xinyu; Kim, Hyun Min; Kawashita, Masakazu; Wang, Longbao; Xiong, Tao; Nakamura, Takashi

doi:10.1007/s10856-007-3314-0

Cited by 33 publications

(34 citation statements)

References 30 publications

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“…The results demonstrated that the surface roughness of treated samples was improved by the formation of sodiumtitanate layer over the modified surface and it was useful for the enhancement of biocompatibility of alkali-heat treated Ti alloy 70 . Cui et al 71 transformed the amorphous titania layer into a crystalline structure by treating with hot water and heat. The capability of the formation of apatite layer was studied through SEM and XRD analysis.…”

Section: Alkali-heat Treatmentmentioning

confidence: 99%

Surface Modification of Titanium and its Alloys for the Enhancement of Osseointegration in Orthopaedics

John

Jaganathan²,

Supriyanto³

et al. 2016

Current Science

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Titanium (Ti) and Ti-based alloys are the best promising orthopaedic metal transplants. The Young's modulus of Ti and bone are nearer and so Ti implants are known as osseointegrated implants. However, the need for enhancing the osseointegration, corrosion resistance and biocompatibility cannot be ruled out in promoting the Ti as a golden standard. This review describes various surface modifications like acid etching, sand blasting, surface coating, alkali-heat treatment, plasma treatment and ion implantation of Ti-based implants which are the best solutions to promote biocompatibility, osseointegration and ultimately the longevity of implants. In addition, it gives an outline to accomplish the risky task in orthopaedics like recovering skeletal function by replacing the damaged bone for human being survival and it will assist the energetic collaboration of specialists in materials science, chemistry and biology for the quality enhancement.

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Section: Alkali-heat Treatmentmentioning

confidence: 99%

Surface Modification of Titanium and its Alloys for the Enhancement of Osseointegration in Orthopaedics

John

Jaganathan²,

Supriyanto³

et al. 2016

Current Science

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“…To date, titanium materials have been pretreated with water, acidic and alkaline chemicals, thermal and electrochemical oxidation, or their combination to improve apatite deposition. 4,6,[8][9][10][11] Other technologies, such as single-and multiple-layer splat…”

Section: Introductionmentioning

confidence: 99%

UV photofunctionalization promotes nano-biomimetic apatite deposition on titanium

Saita

Ikeda²,

Yamada³

et al. 2016

IJN

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Background Although biomimetic apatite coating is a promising way to provide titanium with osteoconductivity, the efficiency and quality of deposition is often poor. Most titanium implants have microscale surface morphology, and an addition of nanoscale features while preserving the micromorphology may provide further biological benefit. Here, we examined the effect of ultraviolet (UV) light treatment of titanium, or photofunctionalization, on the efficacy of biomimetic apatite deposition on titanium and its biological capability. Methods and results Micro-roughed titanium disks were prepared by acid-etching with sulfuric acid. Micro-roughened disks with or without photofunctionalization (20-minute exposure to UV light) were immersed in simulated body fluid (SBF) for 1 or 5 days. Photofunctionalized titanium disks were superhydrophilic and did not form surface air bubbles when immersed in SBF, whereas non-photofunctionalized disks were hydrophobic and largely covered with air bubbles during immersion. An apatite-related signal was observed by X-ray diffraction on photofunctionalized titanium after 1 day of SBF immersion, which was equivalent to the one observed after 5 days of immersion of control titanium. Scanning electron microscopy revealed nodular apatite deposition in the valleys and at the inclines of micro-roughened structures without affecting the existing micro-configuration. Micro-roughened titanium and apatite-deposited titanium surfaces had similar roughness values. The attachment, spreading, settling, proliferation, and alkaline phosphate activity of bone marrow-derived osteoblasts were promoted on apatite-coated titanium with photofunctionalization. Conclusion UV-photofunctionalization of titanium enabled faster deposition of nanoscale biomimetic apatite, resulting in the improved biological capability compared to the similarly prepared apatite-deposited titanium without photofunctionalization. Photofunctionalization-assisted biomimetic apatite deposition may be a novel method to effectively enhance micro-roughened titanium surfaces without altering their microscale morphology.

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“…This has been attributed to an abundance of surface hydroxyl groups and high specific surface area [15][16][17]. However, poor crystallinity of such TiO 2 layers may limit their PCA, and while subsequent heat treatments may improve the crystallinity, such treatments eradicate beneficial hydroxyl groups and reduce the specific surface area [18,19]. Direct H 2 O 2 -oxidation of Ti is also known to produce a Ti-peroxy gel with associated superoxide radicals (Ti(IV)O 2 -) [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Stability and prospect of UV/H2O2 activated titania films for biomedical use

Unosson

Welch

Persson

et al. 2013

Applied Surface Science

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Biomedical implants and devices that penetrate soft tissue are highly susceptible to infection, but also accessible for UV induced decontamination through photocatalysis if coated with suitable surfaces. As an on-demand antibacterial strategy, photocatalytic surfaces should be able to maintain their antibacterial properties over repeated activation. This study evaluates the surface properties and photocatalytic performance of titania films obtained by H 2 O 2 -oxidation and heat treatment of Ti and Ti-6Al-4V substrates, as well as the prospect of assisting photocatalytic reactions with H 2 O 2 for improved efficiency. H 2 O 2 -oxidation generated a nanoporous coating, and subsequent heat treatment above 500°C resulted in anatase formation. Tests using photo-assisted degradation of rhodamine B showed that prior to heat treatment, an initially high photocatalytic activity (PCA) of H 2 O 2 -oxidized substrates decayed significantly with repeated testing. Heat treating the samples at 600°C resulted in stable yet lower PCA. Addition of 3% H 2 O 2 during the photo-assisted reaction led to a substantial increase in PCA due to synergetic effects at the surface and H 2 O 2 photolysis, the effect being most notable for non-heat treated samples. Both heat treated and non-heat treated samples showed stable PCA through repeated tests with H 2 O 2 -assisted photocatalysis, indicating that the combination of H 2 O 2 -oxidized titania films, UV light and added H 2 O 2 can improve efficiency of these photocatalytic surfaces. Highlights Ti and Ti64 substrates were surface modified by H 2 O 2 -oxidation and heat treatments. TiO 2 /UV/H 2 O 2 synergy effects significantly boosted rhodamine B degradation. 3% H 2 O 2 addition increased stability over repeated use.

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Effect of hot water and heat treatment on the apatite-forming ability of titania films formed on titanium metal via anodic oxidation in acetic acid solutions

Cited by 33 publications

References 30 publications

Surface Modification of Titanium and its Alloys for the Enhancement of Osseointegration in Orthopaedics

Surface Modification of Titanium and its Alloys for the Enhancement of Osseointegration in Orthopaedics

UV photofunctionalization promotes nano-biomimetic apatite deposition on titanium

Stability and prospect of UV/H2O2 activated titania films for biomedical use

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