Results 211 to 220 of about 70,475 (260)

Solubility product of OH-carbonated hydroxyapatite

Journal of Biomedical Materials Research Part B, 1997
Information on the solubility of OH-carbonated hydroxyapatite, Ca10(PO4)6(CO3)x(OH)2-2x, previously has not been available. In the present study the solubility product (Ksp) of OH-carbonated hydroxyapatite was measured in a 0.1 M acetic acid and sodium acetate buffer solution in a pH range of 4.0-5.8 at a CO2 partial pressure of 10(-3.52) atm.
Atsuo Ito, Sadao Tsutsumi, T Tateishi
exaly   +3 more sources

Dissolution rates of carbonated hydroxyapatite in hydrochloric acid

Biomaterials, 2002
Osteoclasts have been shown to dissolve efficiently and effectively the mineral phase of bone by locally controlling the environment surrounding the cell. Although this mineral phase has been identified and well characterized as carbonated hydroxyapatite, there is little understanding of the factors that affect the dissolution properties of this ...
Christine R, Hankermeyer, Kevin L, Ohashi, David C, Delaney, John, Ross, Brent R, Constantz   +4 more
exaly   +3 more sources

The uptake of lithium ions by synthetic carbonated hydroxyapatite

Calcified Tissue International, 1986
Carbonated hydroxyapatites in the presence of F- and Li+ were synthesized. Limited uptake (0.2-1.6 ppm) of Li+ by the apatites was observed, which was proportional to the initially added Li+ and the carbonate concentration of the samples. Fluoride has retarding effect on the Li+ uptake.
A Markitziu, Itzhak Gedalia
exaly   +3 more sources

Production of ultra-fine bioresorbable carbonated hydroxyapatite

Acta Biomaterialia, 2006
Ionic-substituted hydroxyapatite (HAp) based materials may be a better choice than pure HAp owing to their similarity in chemical composition with biological apatite. The present study reports a process for the production of carbonated hydroxyapatite (CHAp) using microwaves.
Seeram Ramakrishna
exaly   +3 more sources

Osteoblast activity on carbonated hydroxyapatite

Journal of Biomedical Materials Research Part A, 2012
AbstractHydroxyapatite (HA), has been used commonly as a bone substitute and as a scaffold in bone tissue engineering. However it has certain drawbacks such as limited biodegradability and osteointegration properties. Other forms of HA, for example, carbonated hydroxyapatite (CHA) could prove to have enhanced bioactivity as they more closely mimic the ...
Rupani, Asha, Hidalgo-Bastida, Lilia Araida, Rutten, Frank, Dent, Andrew, Turner, Irene, Cartmell, Sarah; id_orcid 0000-0001-6864-0846   +5 more
openaire   +4 more sources

Effect of Carbonate on Hydroxyapatite Solubility

Crystal Growth & Design, 2010
Carbonate is present in biological apatites (BAp) (enamel, dentine, bone, and pathological calcifications) by substitution at phosphate and hydroxide sites, tending to increase its solubility in comparison with pure hydroxyapatite (HAp). The role of solution carbonate, however, is poorly understood.
Pan, H, Darvell, BW
openaire   +4 more sources

Mechanical Properties of Hydroxyapatite and OH-carbonated Hydroxyapatite Single Crystals

Journal of Dental Research, 1998
Single-crystal hydroxyapatite and OH-carbonated hydroxyapatite have bending strength much higher than that of dense hydroxyapatite ceramic, indicating potential applicability to a load-bearing biomaterial. However, the effects of carbonate on the strength are less clear.
K, Teraoka, A, Ito, K, Maekawa, K, Onuma, T, Tateishi, S, Tsutsumi   +5 more
openaire   +2 more sources

Carbonated Apatite and Hydroxyapatite in Craniofacial Reconstruction

Archives of Facial Plastic Surgery, 2003
Alloplastic biomaterials have revolutionalized craniofacial reconstruction. Commercially available bone substitute cements allow easy contouring and application, as well as avoidance of postoperative donor site complications. Hydroxyapatite and carbonated apatite are commercially available biomaterials currently being used as moldable bone substitutes ...
Kevin K, Mathur, Sherard A, Tatum, Robert M, Kellman   +2 more
openaire   +2 more sources

Carbonated hydroxyapatites precipitated in the presence of Ti

Journal of Inorganic Biochemistry, 2000
Hydroxyapatites (HA) were prepared by precipitation from an aqueous solution with Ti4+ (0-2500 microg/g) and with carbonate (0.8-4.0%) at pH 7.0. The uptake of Ti was found to be 75% of the original amounts. Stoichiometric ratios of Ca/P (1.67) were found for low carbonate samples.
Layani, J.D, Mayer, I, Cuisinier, Frédéric   +2 more
openaire   +2 more sources

Preparation and Characterization of Carbonated Barium Hydroxyapatites

Journal of Colloid and Interface Science, 1999
Carbonated barium hydroxyapatite (Ba10(PO4)6(OH)2-2x(CO3)x, X = 0.30-0.57, BaHAP) particles with different Ba/P molar ratios were prepared by a wet method. CO2-3 ions were incorporated into OH- sites of a BaHAP lattice during the preparation at high solution pH. The obtained BaHAP particles were well crystallized and showed a high thermostability.
, Yasukawa, , Nakajima, , Kandori, , Ishikawa   +3 more
openaire   +2 more sources