The Experts below are selected from a list of 68142 Experts worldwide ranked by ideXlab platform
Daniel Buser - One of the best experts on this subject based on the ideXlab platform.
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potential of chemically modified Hydrophilic Surface characteristics to support tissue integration of titanium dental implants
Journal of Biomedical Materials Research Part B, 2009Co-Authors: Frank Schwarz, Marco Wieland, Zvi Schwartz, Ge Zhao, Frank Rupp, Jurgen Geisgerstorfer, Andreas Schedle, Nina Broggini, Michael M Bornstein, Daniel BuserAbstract:In the past, several modifications of specific Surface properties such as topography, structure, chemistry, Surface charge, and wettability have been investigated to predictably improve the osseointegration of titanium implants. The aim of the present review was to evaluate, based on the currently available evidence, the impact of Hydrophilic Surface modifications of titanium for dental implants. A Surface treatment was performed to produce hydroxylated/hydrated titanium Surfaces with identical microstructure to either acid-etched, or sand-blasted, large grit and acid-etched substrates, but with Hydrophilic character. Preliminary in vitro studies have indicated that the specific properties noted for Hydrophilic titanium Surfaces have a significant influence on cell differentiation and growth factor production. Animal experiments have pointed out that Hydrophilic Surfaces improve early stages of soft tissue and hard tissue integration of either nonsubmerged or submerged titanium implants. This data was also corroborated by the results from preliminary clinical studies. In conclusion, the present review has pointed to a potential of Hydrophilic Surface modifications to support tissue integration of titanium dental implants.
Shuichi Shoji - One of the best experts on this subject based on the ideXlab platform.
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Integrated Hydrophilic Surface treatment system of vapor deposition polymerization and vacuum ultraviolet irradiation for chemical/biochemical microchips
Microelectronic Engineering, 2011Co-Authors: Hidetoshi Shinohara, T. Hori, S. Umeda, Y. Takahashi, Shuichi Shoji, Osamu Ohara, Jun MizunoAbstract:A novel system for Hydrophilic Surface treatment was developed. This system consists of a vapor deposition polymerization (VDP) unit for aromatic polyurea coating and a vacuum ultraviolet (VUV) irradiation unit for the Hydrophilic treatment of the coated polyurea. Because the two vacuum chambers are connected by a load-lock system, a highly Hydrophilic Surface can be obtained without airborne molecular contamination (in situ process). The typical thickness of the polyurea film ranges from tens of nanometers to several micrometers. This system can be used for the high-throughput fabrication of chemical/biochemical microchips, which require a stable highly Hydrophilic Surface. The polyurea is made highly Hydrophilic and a water contact angle of
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Surface Hydrophilic treatment of polyurea film realized by vacuum ultraviolet light irradiation and its application for poly methylmethacrylate blood analysis chip
Sensors and Actuators B-chemical, 2008Co-Authors: Hidetoshi Shinohara, Y. Takahashi, Jun Mizuno, Shuichi ShojiAbstract:Abstract A room temperature Hydrophilic method of the polyurea film Surface was developed using vacuum ultraviolet (VUV) light at 172 nm in wavelength. The treated film has highly Hydrophilic Surface for long time (∼2 months). The stable Hydrophilic Surface, water contact angle of smaller than 20°, was realized. It is kept even after very hard condition of ultrasonic cleaning in de-ionized water. The polyurea film was applied for poly(methylmethacrylate) (PMMA) blood analysis chip. The performance of the Surface treatment was evaluated by actual human whole blood flow. The new chip can reduce the adhesion of platelets and white blood cells, even after ultrasonic cleaning in surfactant-induced water.
Santy Sulaiman - One of the best experts on this subject based on the ideXlab platform.
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Modification of Silicone Elastomers Using Silicone Comonomers Containing Hydrophilic Surface Active Endgroups
MRS Online Proceedings Library, 2014Co-Authors: Jonathan Goff, Barry C. Arkles, Santy SulaimanAbstract:A facile technique was developed for a long-term increase in silicone elastomer Surface Hydrophilicity, eliminating the need for post-cure Surface treatment (e.g. oxygen plasma or Surface grafting). Well-defined silicones (1-4 kDa) with a central vinyl functionality and discrete PEG_2, PEG_3 and tetrahydrofurfuryl (THF) pendant endgroups were synthesized, characterized and used as comonomers in addition-cure, platinum catalyzed 2-part silicone elastomer formulations. The modified silicone elastomers were optically clear and maintained the mechanical performance characteristic of this class of material with up to 20 wt.% comonomer in the 2-part formulation. Contact angle measurements of deionized water on the silicone elastomer Surface showed improved wettability with comonomer content. The elastomer Surface shifted from hydrophobic (contact angle ∼120°C) to Hydrophilic (contact angle < 90°C) at ∼5 wt.% comonomer loadings for extended time frames (> 5 months). Coefficient of friction measurements of the modified silicone elastomers revealed an increase in Surface lubricity with comonomer loadings.
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Modification of Silicone Elastomers Using Silicone Comonomers Containing Hydrophilic Surface Active Endgroups
MRS Proceedings, 2014Co-Authors: Jonathan D. Goff, Barry C. Arkles, Santy SulaimanAbstract:A facile technique was developed for a long-term increase in silicone elastomer Surface Hydrophilicity, eliminating the need for post-cure Surface treatment (e.g. oxygen plasma or Surface grafting). Well-defined silicones (1-4 kDa) with a central vinyl functionality and discrete PEG 2 , PEG 3 and tetrahydrofurfuryl (THF) pendant endgroups were synthesized, characterized and used as comonomers in addition-cure, platinum catalyzed 2-part silicone elastomer formulations. The modified silicone elastomers were optically clear and maintained the mechanical performance characteristic of this class of material with up to 20 wt.% comonomer in the 2-part formulation. Contact angle measurements of deionized water on the silicone elastomer Surface showed improved wettability with comonomer content. The elastomer Surface shifted from hydrophobic (contact angle ~120 o C) to Hydrophilic (contact angle 5 months). Coefficient of friction measurements of the modified silicone elastomers revealed an increase in Surface lubricity with comonomer loadings.
Ichiro Takano - One of the best experts on this subject based on the ideXlab platform.
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Formation of super-Hydrophilic Surface of hydroxyapatite by ion implantation and plasma treatment
Surface & Coatings Technology, 2005Co-Authors: Yoshio Okabe, Sinya Kurihara, Tatsuhiko Yajima, Yoichi Seki, Isao Nakamura, Ichiro TakanoAbstract:Abstract Control of the Hydrophilic properties of hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2 (HAp) is important for the use of biocompatible materials. From this standing point, hydroxyapatite was implanted with N 2 + , O 2 + and Ar + with 1×10 17 –1×10 21 ions m −2 at an energy of 20 keV. It was also immersed in an RF plasma of Ar, C 2 H 5 OH, CH 3 OH and CF 4 induced at RF power of 50–150 W. Contact angles for various specimens were measured and the formation mechanism of Hydrophilic Surfaces are discussed. Hydrophilic HAp Surfaces were formed by N 2 + , O 2 + and Ar + implantations and plasma treatments of Ar, C 2 H 5 OH and CH 3 OH, with contact angles from 10° to 60°. Only the CF 4 plasma treatment can form super-Hydrophilic Surfaces with contact angles of 4–8°. The Hydrophilic and super-Hydrophilic formation mechanism was discussed based on analysis of XPS data.
Hidetoshi Shinohara - One of the best experts on this subject based on the ideXlab platform.
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Integrated Hydrophilic Surface treatment system of vapor deposition polymerization and vacuum ultraviolet irradiation for chemical/biochemical microchips
Microelectronic Engineering, 2011Co-Authors: Hidetoshi Shinohara, T. Hori, S. Umeda, Y. Takahashi, Shuichi Shoji, Osamu Ohara, Jun MizunoAbstract:A novel system for Hydrophilic Surface treatment was developed. This system consists of a vapor deposition polymerization (VDP) unit for aromatic polyurea coating and a vacuum ultraviolet (VUV) irradiation unit for the Hydrophilic treatment of the coated polyurea. Because the two vacuum chambers are connected by a load-lock system, a highly Hydrophilic Surface can be obtained without airborne molecular contamination (in situ process). The typical thickness of the polyurea film ranges from tens of nanometers to several micrometers. This system can be used for the high-throughput fabrication of chemical/biochemical microchips, which require a stable highly Hydrophilic Surface. The polyurea is made highly Hydrophilic and a water contact angle of
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Surface Hydrophilic treatment of polyurea film realized by vacuum ultraviolet light irradiation and its application for poly methylmethacrylate blood analysis chip
Sensors and Actuators B-chemical, 2008Co-Authors: Hidetoshi Shinohara, Y. Takahashi, Jun Mizuno, Shuichi ShojiAbstract:Abstract A room temperature Hydrophilic method of the polyurea film Surface was developed using vacuum ultraviolet (VUV) light at 172 nm in wavelength. The treated film has highly Hydrophilic Surface for long time (∼2 months). The stable Hydrophilic Surface, water contact angle of smaller than 20°, was realized. It is kept even after very hard condition of ultrasonic cleaning in de-ionized water. The polyurea film was applied for poly(methylmethacrylate) (PMMA) blood analysis chip. The performance of the Surface treatment was evaluated by actual human whole blood flow. The new chip can reduce the adhesion of platelets and white blood cells, even after ultrasonic cleaning in surfactant-induced water.
