Wettability conversion and surface friction force variation of polycrystalline rutile ceramics under UV illumination

Okudaira, Kenji; Kato, T.; Isobe, Toshihiro; Matsushita, Sachiko; Kogure, Toshihiro; Nakajima, Akira

doi:10.1016/j.jphotochem.2011.05.002

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…This was in contrast to a previous study, which suggested that higher roughness leads to decreased contact angle on hydrophilic surfaces . Thus the hydrophilicity in this study was more affected by surface chemistry than roughness . Contact angle could be increased by surface hydride amount although no significant relationship was found ( p > 0.05), and may be also related to the existence of hydrocarbon and carbonates .…”

Section: Discussioncontrasting

confidence: 99%

“…40 Contact angle could be increased by surface hydride amount although no significant relationship was found (p > 0.05), and may be also related to the existence of hydrocarbon and carbonates. 42 Because all test surfaces were treated in organic acid pools, there could be remnant organic molecules except air contaminations on top responsible for the lower hydrophilicity.…”

Section: Discussionmentioning

confidence: 99%

“…This prompted us to question if to use hydrophilicity as one of the decisive conditions for fibroblast response. Because hydrophilicity is affected by roughness, 40 organic contamination 42 and chemistry of the material, 41 it probably resulted from the combination of these factors. Hence it may not be the direct influencing factor toward fibroblast growth.…”

Section: Discussionmentioning

confidence: 99%

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Surface hydride on titanium by cathodic polarization promotes human gingival fibroblast growth

Xing

Salou

Taxt-Lamolle

et al. 2013

J Biomedical Materials Res

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Connective tissue seal to dental abutment is crucial for peri-implant health. Several efforts have been made previously to optimize abutment surfaces, but no consensus has been reached regarding the optimal surface architecture and/or composition for soft tissue seal. Here, we report on experiments using cathodic polarization in organic acids to optimize titanium (Ti) surfaces for use as abutments. The three main factors affecting surface topography and chemistry were electrolyte composition, current density, and polarization time. Under identical conditions, oxalic acid created rougher surfaces than tartaric acid and acetic acid, and acetic acid produced more surface hydride. Surface hydride amount was suggested to first increase and then decrease with current density from 1 mA/cm(2) to 15 mA/cm(2) . The complexity of the surface topography and hydride production both increased with polarization time. Proliferation rate of human gingival fibroblasts (HGFs) was positively correlated with surface hydride content, suggesting the positive effect of surface hydride on connective tissue growth around dental abutment. Changes in surface topography and hydrophilicity did not significantly influence HGF growth.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Surface hydride on titanium by cathodic polarization promotes human gingival fibroblast growth

Xing

Salou

Taxt-Lamolle

et al. 2013

J Biomedical Materials Res

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“…) and surface chemistry (Okudaira et al. ), hydrophilicity may not be the decisive parameter for biofilm formation.…”

Section: Discussionmentioning

confidence: 99%

The influence of surface nanoroughness, texture and chemistry of TiZr implant abutment on oral biofilm accumulation

Xing

Lyngstadaas

Ellingsen

et al. 2014

Clinical Oral Implants Res

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“…Driven by the broad application prospects, many controllable friction devices regulated with external stimuli have been designed and fabricated. Some examples of external stimuli are solvents, [5][6][7] pH, [8][9][10] temperature, [11][12][13] electric potential, [14][15][16] light, [17][18][19] and magnetic fields. [20][21][22] When external stimuli are imposed on such smart materials, the macroscopic physicochemical properties of the materials are dramatically changed.…”

Section: Introductionmentioning

confidence: 99%

Controllable Friction of Green Ionic Liquids via Environmental Humidity

et al. 2020

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Intelligent control of friction is an attractive but challenging topic. In this work, it is investigated if it would be possible to adjust friction in a lubricated contact by controlling environmental humidity. By exploiting the ability to adjust the environmental humidity by various saturated salt solutions, friction behavior of contacts lubricated with Choline l‐Proline ([Cho][Pro]) is modulated in a wide range of relative humidity (RH). The friction increases when the environmental humidity is increased and decreases when water is partially evaporated to a lower RH. It is thus possible to control friction by environmental humidity. The addition of water in ionic liquids (ILs) causes a decrease in viscosity, but as the tests are calculated to be performed in boundary lubrication the viscosity change is not the main factor for the change in friction. The friction sensitivity of RH can be explained by the effect of adhesion on the water uptake from humid air by [Cho][Pro]. Furthermore, the reversible changes of H‐bond types determined by the water content could be another explanation to the altered friction.

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Wettability conversion and surface friction force variation of polycrystalline rutile ceramics under UV illumination

Cited by 13 publications

References 30 publications

Surface hydride on titanium by cathodic polarization promotes human gingival fibroblast growth

Surface hydride on titanium by cathodic polarization promotes human gingival fibroblast growth

The influence of surface nanoroughness, texture and chemistry of TiZr implant abutment on oral biofilm accumulation

Controllable Friction of Green Ionic Liquids via Environmental Humidity

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