The Surface of Titanium Dioxide

Parfitt, G. D.

doi:10.1016/b978-0-12-571811-0.50009-1

Cited by 172 publications

(86 citation statements)

References 97 publications

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“…A number of papers have been published suggesting that the titanium oxide surface has two hydroxide groups: acidic and basic types [16][17][18][19]. The two types of hydroxides have been linked to different bonds between the Ti surface cations and basic hydroxide coordinated to one Ti cation (bridge coordination) leading to increased polarization and electron transfer from the oxygen atom to the Ti cation.…”

Section: Surface Structure and Propertiesmentioning

confidence: 99%

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Liu

Chu

Ding

2004

Materials Science and Engineering: R: Reports

3,035

1,477

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Titanium and titanium alloys are widely used in biomedical devices and components, especially as hard tissue replacements as well as in cardiac and cardiovascular applications, because of their desirable properties, such as relatively low modulus, good fatigue strength, formability, machinability, corrosion resistance, and biocompatibility. However, titanium and its alloys cannot meet all of the clinical requirements. Therefore, in order to improve the biological, chemical, and mechanical properties, surface modification is often performed. This article reviews the various surface modification technologies pertaining to titanium and titanium alloys including mechanical treatment, thermal spraying, sol-gel, chemical and electrochemical treatment, and ion implantation from the perspective of biomedical engineering. Recent work has shown that the wear resistance, corrosion resistance, and biological properties of titanium and titanium alloys can be improved selectively using the appropriate surface treatment techniques while the desirable bulk attributes of the materials are retained. The proper surface treatment expands the use of titanium and titanium alloys in the biomedical fields. Some of the recent applications are also discussed in this paper. #

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Section: Surface Structure and Propertiesmentioning

confidence: 99%

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Liu

Chu

Ding

2004

Materials Science and Engineering: R: Reports

3,035

1,477

View full text Add to dashboard Cite

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“…The pzc is the unique value for an oxide and an indicator which the oxide shows acidic or basic property. For example, in the case of TiO 2 , the pzc of rutile is 5.3 and that of anatase is 6.2 [15] (Fig. 5.4c).…”

Section: Mechanism Of Osseointegration In Titaniummentioning

confidence: 96%

“…Active surface hydroxyl groups dissociates in aqueous solutions and forms electric charges as shown in Fig. 5.4b [15][16][17][18]. Positive or negative charge due to the dissociation is governed by pH of the surrounding aqueous solution: positive and negative charges are balanced and apparent charge is zero at a certain pH.…”

Section: Mechanism Of Osseointegration In Titaniummentioning

confidence: 99%

Biofunctionalization of Metallic Materials: Creation of Biosis–Abiosis Intelligent Interface

Hanawa

2015

Interface Oral Health Science 2014

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Osseointegration, the first concept of biosis-abiosis intelligent interface, is primarily explained, and researches on the elucidation of osseointegration mechanism and titanium-tissue interface observation are reviewed to understand a concept to create biosis-abiosis intelligent interface. In addition, current status of surface treatment of metallic materials is reviewed. In particular, a gap between research level progress and commercialization in surface treatments is focused. Mechanical property, durability, and manufacturing process of surface layer formed on titanium by surface treatment, are significant to commercialize the treatment, while most of researches focuses only evaluation of biocompatibility and biofunction. IntroductionExcellent biocompatibility and biofunction of ceramics and polymers are expected to show excellent properties as biomaterials; in fact many devices consisting of metals have been substituted by those consisting of ceramics and polymers. In spite of this event, over 70 % of implant devices in medical field including dentistry, especially over 95 % in orthopedics, still consist of metals, and this share is currently maintained, because of their high strength, toughness, and durability.On the contrary, a disadvantage of using metals as biomaterials is that they are typically artificial materials and have no biofunction. Therefore, metal surface naturally forms a clear interface against living tissue that works as a barrier to conduct biofunctions. To add biocompatibility and biofunction to metals, in other words, to create biosis-abiosis intelligent interface, surface treatment is essential,

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“…The point of zero charge in anatase-type TiO 2 is reported to be at a pH of 6.2 [18]. The Ti-OH groups react with hydroxyl ions in the SBF, which has a pH of 7.4, and this gives rise to a negatively charged surface with functional Ti-O  groups [11].…”

Section: Effect Of Uv Irradiation On Hap Morphologymentioning

confidence: 99%

Photo-Induced Formation of Hydroxyapatite on Titanium Oxides in Simulated Body Fluid

Ueda

Sai

Arachi

et al. 2010

Trans. Mat. Res. Soc. Japan

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Hydroxyapatite (HAp), Ca 10 (PO 4 ) 6 (OH) 2 , is known to precipitate on bioactive materials such as TiO 2 and CaTiO 3 by soaking in simulated body fluid (SBF). The formation of HAp on TiO 2 surfaces under continuous ultraviolet (UV) irradiation was investigated. Anatase-type TiO 2 film was synthesized on pure Ti substrates by a combined chemical-hydrothermal treatment. The specimens were immersed in SBF in darkness or under UV irradiation with a centered wavelength of = 365 nm. Under dark conditions, a thin homogeneous HAp film was formed, with just a few spherical clusters of HAp. The UV irradiation promoted the formation of HAp clusters, which may be due to the generation of functional Ti-OH or Ti-O  groups on the TiO 2 surface. The UV light produces electron-hole pairs in the TiO 2 . When an n-type semiconductor is immersed in an aqueous solution, an up-hill potential gradient is produced towards the surface in the conduction and the valence bands. Therefore, the photogenerated holes migrate to the surface and repel the Ca 2+ ions in the solution near the surface of TiO 2 . As a consequence, the UV irradiation suppressed the formation of a HAp thin film.

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The Surface of Titanium Dioxide

Cited by 172 publications

References 97 publications

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Biofunctionalization of Metallic Materials: Creation of Biosis–Abiosis Intelligent Interface

Photo-Induced Formation of Hydroxyapatite on Titanium Oxides in Simulated Body Fluid

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