Results 221 to 230 of about 70,475 (260)

Zinc ions in synthetic carbonated hydroxyapatites

Archives of Oral Biology, 1994
Carbonated hydroxyapatites were synthesized at pH 7.0 and 9.0 with a carbonate content up to 9.2%, in the presence of Zn2+ ions. The uptake of Zn was found to be proportional to the amount of Zn added at precipitation. Chemical, lattice constant, microprobe and thermal analyses indicate incorporation of Zn into the apatite lattice.
I, Mayer, F, Apfelbaum, J D, Featherstone   +2 more
openaire   +2 more sources

The Remineralizing Effect of Carbonate-Hydroxyapatite Nanocrystals on Dentine

Materials Science Forum, 2007
The use of specific remineralizing agents in toothpastes may help to prevent caries and treat dentinal sensitivity. In this study, applied nanotechnologies were used to develop a filler for toothpastes with remineralizing properties. Carbonate hydroxyapatite nanocrystals, with size, morphology, chemical composition and crystallinity comparable with ...
L. Rimondini, PALAZZO, BARBARA, IAFISCO, MICHELE, L. Canegallo, F. Demarosi, M. Merlo, ROVERI, NORBERTO   +6 more
openaire   +2 more sources

Effect of carbonate content on the in vitro bioactivity of carbonated hydroxyapatite

Ceramics International, 2022
The effect of carbonate content on the apatite-forming ability of carbonated hydroxyapatite (CHA) in simulated body fluid (SBF) has been investigated. Five different nanocrystalline B-type CHA with carbonate content ranged from 2.01 to 5.25 wt% were prepared, sintered, and assessed for their in vitro bioactivity in SBF solution for 7-weeks under static
Safarzadeh, Marjan, Chee, Chin Fei, Ramesh, Singh   +2 more
openaire   +2 more sources

Carbonated hydroxyapatite as bone substitute

Journal of the European Ceramic Society, 2003
B-carbonateapatite (CHA) powder was synthesized starting from calcium nitrate tetrahydrate, diammonium hydrogen phosphate and sodium hydrogen carbonate. The powder was fully characterized in terms of phase purity, stoichiometry, morphology, specific surface area and particle size distribution.
Landi E, Celotti G, Logroscino G, Tampieri A   +3 more
openaire   +5 more sources

ESR measurement of carbonated hydroxyapatite for dosemeter

Radiation Protection Dosimetry
Abstract We have examined a dosimetry characteristic of carbonate hydroxyapatite (CO3HAp), which is a dental bone graft material. The purpose of this work is to investigate the reproducibility and stability of radiation-induced radicals on CO3HAp samples and assess the feasibility of using these materials as dosemeters.
Hajime Seito, Eri Yokozuka, Toshitaka Oka, Yoshihiro Kitatsuji, Naotsugu Nagasawa   +4 more
openaire   +2 more sources

Osteoclast adhesion and activity on synthetic hydroxyapatite, carbonated hydroxyapatite, and natural calcium carbonate: Relationship to surface energies

Journal of Biomedical Materials Research, 1999
This study investigates the adhesion, cytoskeletal changes, and resorptive activity of disaggregated rat osteoclasts cultured on polished slices of three biomaterials: crystalline synthetic hydroxyapatite (HA), carbonated hydroxyapatite (C-HA), and natural calcium carbonate (C).
S A, Redey, S, Razzouk, C, Rey, D, Bernache-Assollant, G, Leroy, M, Nardin, G, Cournot   +6 more
openaire   +2 more sources

Osteoclastogenesis on hydroxyapatite ceramics: The effect of carbonate substitution

Journal of Biomedical Materials Research Part A, 2009
AbstractHuman osteoclasts derived from CD14+ve precursors were cultured on discs of stoichiometric hydroxyapatite (HA) and carbonate‐substituted hydroxyapatite (CHA) of varying carbonate contents. The development of osteoclasts was qualitatively different on ceramics compared to dentine, occurring in discrete, confluent subpopulations, which suggests ...
Gavin, Spence, Nelesh, Patel, Roger, Brooks, William, Bonfield, Neil, Rushton   +4 more
openaire   +2 more sources

Carbonate hydroxyapatite gel monolith formation and drying

Bio-Medical Materials and Engineering, 1996
The effect of carbonate in reducing the crystal size of precipitated hydroxyapatite by approximately an order of magnitude has not been used previously in the preparation of gel monoliths for the fabrication of carbonate hydroxyapatite ceramics. The aim of this study was to devise a method whereby gel monoliths of carbonate hydroxyapatite could be ...
J E, Barralet, S M, Best, W, Bonfield
openaire   +2 more sources

Biomimetic synthesis of carbonated hydroxyapatite thin films

Thin Solid Films, 2006
Abstract Free-standing continuous carbonated hydroxyapatite (HA) films were synthesized at room temperature through a biomimetic pathway. A stearic acid monolayer was utilized as a template for inducing deposition from supersaturated calcium phosphate solutions.
BOANINI, ELISA, BIGI, ADRIANA
openaire   +2 more sources

Preparation and Properties of Carbon Nanotube-Reinforced Hydroxyapatite

Key Engineering Materials, 2007
Composites of hydroxyapatite (HA) and multiwalled carbon nanotubes (CNTs) have been prepared and characterised for potential application in major load-bearing medical devices. We have studied the effect of nanotube surface chemistry, composite preparation methods, and heat treatment conditions on the microstructure of the composites, dispersion of CNTs,
White, Ashley A., Windle, Alan H., Kinloch, Ian A., Best, Serena M.   +3 more
openaire   +1 more source