Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Titanium (3)
- Biocompatibility (2)
- Scanning electron microscopy (2)
- Adhesion (1)
- Aging (1)
-
- Amelogenesis (1)
- Apatite (1)
- Dental alloy (1)
- Dental casting (1)
- Dental implant (1)
- Dental implants (1)
- Dental plaque (1)
- Dental prostheses (1)
- Dentistry (1)
- Diffusion (1)
- Electrochemical corrosion (1)
- Enamel mineralization (1)
- Eutectic (1)
- Fibroblasts (1)
- Fluoride (1)
- Hydroxylapatite (1)
- Investment (1)
- Microbial colonization (1)
- Microstructure (1)
- Octacalcium phosphates (1)
- Palladium (1)
- Strength (1)
- X -ray energy-dispersive spectroscopy (1)
Articles 1 - 5 of 5
Full-Text Articles in Medicine and Health Sciences
In Vivo Early Plaque Colonization On Smooth Titanium Surface, A. Carrassi, A. Sardella, L. Rimondini
In Vivo Early Plaque Colonization On Smooth Titanium Surface, A. Carrassi, A. Sardella, L. Rimondini
Cells and Materials
Plaque development on pure titanium in a 24-hour period is described in an in vivo human model. Stents with titanium and root cementum specimens were applied to volunteers, who suspended oral hygiene procedures for 24 hours. The specimens were removed at 2, 4 and 24 hours and studied with a scanning electron microscope. A global area of 240 µm x 300 µm, composed of the sum of twelve 20 µm x 25 µm fields randomly selected, was examined for each specimen. The presence of cocci, short rods, long rods and bacterial aggregation, and bacteria density was recorded for each field. …
Physical And Biological Evaluation Of Hydroxylapatite Films Formed On Ti6a14v Substrates By Excimer Laser Ablation, Tatjana Dostálová, Miroslav Jelínek, Lucie Himmlová, Vlasta Pesáková, Milan Adam
Physical And Biological Evaluation Of Hydroxylapatite Films Formed On Ti6a14v Substrates By Excimer Laser Ablation, Tatjana Dostálová, Miroslav Jelínek, Lucie Himmlová, Vlasta Pesáková, Milan Adam
Cells and Materials
Thin films of hydroxylapatite, about 500 nm, were formed on Ti6Al4V by excimer laser ablation. Ten different deposition conditions were used such as deposition atmosphere (vacuum, pure water vapor, mixture of Ar and water vapor), substrate temperature, target-substrate distance and energy density. Mechanical and physical analyses were carried out by Rutherford backscattering and particle induced X-ray emission; crystallinity of films was determined by X-ray diffraction, surface topography by scanning electron microscopy and adhesion by a scratch test. Biological evaluation of samples was also performed. The fibroblast proliferation test was used, morphological evaluation of macrophages was carried out, and the activity …
The Use Of Titanium In Dentistry, Toru Okabe, Hakon Hero
The Use Of Titanium In Dentistry, Toru Okabe, Hakon Hero
Cells and Materials
The aerospace, energy, and chemical industries have benefitted from favorable applications of titanium and titanium alloys since the 1950's. Only about 15 years ago, researchers began investigating titanium as a material with the potential for various uses in the dental field, mainly because of its proven biocompatibility and other attractive properties. The present review examines updated information on the use of titanium in a major area of dentistry. Titanium-based alloys used for casting, casting equipment and procedures, casting investment materials, and porcelain veneering are discussed. Information about advances made in techniques other than casting, which could widen the applications of …
Room Temperature Aging Of Pd-Cu-Ga Dental Alloys, William A. Brantley, Zhuo Cai, Qiang Wu, Alan B. Carr, John C. Mitchell
Room Temperature Aging Of Pd-Cu-Ga Dental Alloys, William A. Brantley, Zhuo Cai, Qiang Wu, Alan B. Carr, John C. Mitchell
Cells and Materials
Specimens of three Pd-Cu-Ga dental alloys cast five years ago and subsequently stored at room temperature were reexamined and observed to have lower amounts of the eutectic constituents in the near-surface region than originally present, along with other microstructural changes. This previously unreported room temperature aging behavior of these alloys is attributed to the presence of high-diffusivity paths in the non-equilibrium ascast eutectic structures and to the essential role of the surface for the vacancy diffusion mechanism. These results may have important clinical significance for the ill vivo corrosion resistance and long-term biocompatibility of the Pd-Cu-Ga alloys.
Effects Of Fluoride On Precipitation And Hydrolysis Of Octacalcium Phosphate In An Experimental Model Simulating Enamel Mineralization During Amelogenesis, M. J. Mura-Galelli, H. Narusawa, T. Shimada, M. Iijima, T. Aoba
Effects Of Fluoride On Precipitation And Hydrolysis Of Octacalcium Phosphate In An Experimental Model Simulating Enamel Mineralization During Amelogenesis, M. J. Mura-Galelli, H. Narusawa, T. Shimada, M. Iijima, T. Aoba
Cells and Materials
The present study was undertaken to investigate effects of fluoride at low concentrations on the precipitation of calcium phosphates on hydroxyapatite seeds in media resembling the enamel fluid composition. To this end, we used a new crystal growth model adopting a miniaturized reaction column. Experimental solutions had the composition similar to that found in the enamel fluid, except for calcium concentrations which were adjusted at 1.0 and 0.5 mM. Precipitation reactions taking place in the system at the higher supersaturation ([Ca] = 1 mM) were characterized by co-precipitation of platelike OCP and rod-like apatite crystals, while the reaction at the …