A5071715586- Bone Tissue Engineering Materials
- Dental Implant Techniques and Outcomes
- Orthopaedic implants and arthroplasty
- Dental materials and restorations
- Calcium Carbonate Crystallization and Inhibition
- Titanium Alloys Microstructure and Properties
- biodegradable polymer synthesis and properties
- Polymer Surface Interaction Studies
- Electrospun Nanofibers in Biomedical Applications
- Silicone and Siloxane Chemistry
- Additive Manufacturing and 3D Printing Technologies
- 3D Printing in Biomedical Research
- Chemical Synthesis and Characterization
- Collagen: Extraction and Characterization
- Mesoporous Materials and Catalysis
- Metal and Thin Film Mechanics
- Marine Biology and Environmental Chemistry
- Diatoms and Algae Research
- Endodontics and Root Canal Treatments
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Facial Trauma and Fracture Management
- Graphene and Nanomaterials Applications
- Advanced materials and composites
- Glass properties and applications
Fukuoka Dental College
2011-2024
Kyushu University
2013-2022
Kyushu Dental University
2010-2020
Case Western Reserve University
2019
Cornell University
2019
Ho Chi Minh City University of Technology
2016
Okayama University
2002-2015
Kyushu Institute of Technology
2015
University of Dental Medicine
2015
Fukuoka University
2015
A titania layer with ordered nanostructures is expected to be of high photocatalytic activity due mainly its specific surface area. In the present work, large-area films nanorods were deposited on titanium substrates through a solution approach. The nanorods, phase composition mixture anatase and rutile, grew top condensed interlayer along rutile [001]-axis. was evaluated by decomposing rhodamine B in water compared general sol−gel derived commercial DP-25 coating. It found that as-deposited...
Three commercially available artificial bone substitutes with different compositions, hydroxyapatite (HAp; Neobone®), carbonate apatite (CO₃Ap; Cytrans®), and β-tricalcium phosphate (β-TCP; Cerasorb®), were compared respect to their physical properties tissue response bone, using hybrid dogs. Both Neobone® (HAp) Cerasorb® (β-TCP) porous, whereas Cytrans® (CO₃Ap) was dense. Crystallite size specific surface area (SSA) of (HAp), (CO₃Ap), 75.4 ± 0.9 nm, 30.8 0.8 78.5 7.5 0.06 m²/g, 18.2 1.0...
Surface modification of titanium and its alloys to induce apatite deposition within a short period is practical importance in clinical applications. In this study, substrates were treated with hydrogen peroxide solutions at low temperatures yield titania layers consisting anatase rutile. Those layers, regardless the fraction rutile, bioactive Kokubo's simulated body fluid 24 h. The bioactivity was attributed both epitaxial effect abundant Ti–OH group layer.
Commercially pure titanium was treated with a H2 O2/3mM TaCl5 solution at 80°C for various periods and titania gel layer formed on the surface. This remained amorphous when heating 1 h below 200°C transformed to anatase after between 300° 600°C. The layers were found be bioactive as deposit carbonate ion-incorporated apatite within day of immersion in Kokubo solution, whereas did not 7 days. particles nucleate preferentially inside cracks prevailing thicker 1-h chemically specimens. After...
Commercially pure titanium specimens are subjected to three different treatments, and their bioactivity evaluated by immersing the in a simulated body fluid (SBF, Kokubo's recipe) for various periods up 7 days, with particular attention being paid differences apatite deposition between surfaces open SBF contact container's bottom. The treatment H(2)O(2)/HCl solution at 80 degrees C 30 min followed heating 400 1 h produces an anatase titania gel layer on specimen surface. This deposits both...
Commercially pure titanium specimens are subjected to three different treatments, and their bioactivity evaluated by immersing the in a simulated body fluid (SBF, Kokubo's recipe) for various periods up 7 days, with particular attention being paid differences apatite deposition between surfaces open SBF contact container's bottom. The treatment H(2)O(2)/HCl solution at 80 degrees C 30 min followed heating 400 1 h produces an anatase titania gel layer on specimen surface. This deposits both...
29 Si and 31 P magic‐angle‐spinning nuclear magnetic resonance (MAS‐NMR) spectra were used to analyze 20Na 2 O·80SiO glass particles before after soaking in a simulated body fluid (SBF; Kokubo solution, pH 7.4) for various periods (up 14 d). The structure of the bulk surface, as well chemical states calcium phosphates adsorbed on examined. SBF showed two MAS‐NMR resonances, at −100 −110 ppm, which attributable Si(OSi) 3 ONa 4 units, respectively. A new ‐105 ppm peak, was due OH appeared grew...
Agglomerated amino‐modified silica nanoparticles were prepared from a novel Stöber‐like precursor system consisting of aminopropyltriethoxysilane (APTES), tetraethoxysilane (TEOS), ethanol, and water where the molar ratio APTES/TEOS was 0, 0.1, 1.0, 2.0, H 2 O/‐SiOC 5 about 20 to 60, or great excess amounts O employed. APTES catalyzed hydrolysis condensation both silanes. 29 Si magic angle spinning nuclear magnetic resonance spectra confirmed that particles consisted Q n species (Si(OSi)...
Abstract We examined the blood compatibility and protein adsorption on hydroxyapatite hydroxy‐carbonate apatite. Those apatites were synthesized under a 0, 5, or 15% CO 2 ‐containing N atmosphere by wet‐chemical method with strong ammonia alkali solution of calcium nitrate diammonium hydrogen phosphate (5:3 in molar ratio) subsequent calcination range 105–700°C. From infrared (IR) analysis, carbonate ions substituted both hydroxyl lattice; intensities IR bands assignable to reduced...
For brain tissue regeneration, any scaffold for migrated or transplanted stem cells with supportive angiogenesis is important once necrotic has formed a cavity after injury such as cerebral ischemia. In this study, new porous gelatin–siloxane hybrid derived from the integration of gelatin and 3-(glycidoxypropyl) trimethoxysilane was implanted three-dimensional into defect cortex. The lesion remained at same site 60 days, kept integrity shape, attached well to surrounding tissues. Marginal...
Carbonate apatite (CO 3 Ap), the form of found in bone, has recently attracted attention. The purpose present study was to histologically evaluate tissue/cellular response toward low-crystalline CO Ap fabricated using a dissolution-precipitation reaction with set gypsum as precursor. When immersed 100°C 1 mol/L Na PO 4 aqueous solution for 24 h, transformed into Ap. Both and sintered hydroxyapatite (s-HAp), which used control, were implanted surgically created tibial bone defects rats...