Confirmation of coating of Fluoride in Fluorapatite
coated Hydroxyapatite was done using Energy Dispersion X-Ray Spectroscopy and it was observed that distinct fluoride peak was seen at 0.70 KeV, which was not found in Hydroxyapatite graft (Fig.
It is composed of several reaction zones (Figure 3), which are described as follows: (1) grey color reaction zone (2-8.5 mm in thickness) consisting of calcite + dolomite + graphite; (2) light grey color reaction zone (1-3.5 mm in thickness) consisting of diopside + calcite [+ or -] tremolite; (3) brown reddish color reaction zone (1.5-20 mm in thickness) consisting of Ti-clinohumite + calcite + clinochlore [+ or -] muscovite [+ or -] fluorapatite
[+ or -] graphite; (4) orange color reaction zone (2-6.5 mm in thickness) consisting of Ti-clinohumite + calcite + dolomite + clinochlore + rutile [+ or -] muscovite; (5) light yellow color reaction zone (2-5.5 mm in thickness) consisting of dolomite + calcite + forsterite (antigorite).
In profile C, however, the concentration of P in protolith is greater than that in the chemical composition of the UCC because the fluorapatite
mineral is retained in the shale during the XRD experiment.
Instead of having fluorapatite
, Mars has chlorapatite, where chlorine takes place of the fluorine component; it also has a phosphate-bearing mineral called merrillite, not found on Earth.
The results of X-ray powder diffraction analysis showed that the main minerals of the rock are calcite, fluorapatite
Resorption of hydroxiapatite and fluorapatite
coatins in man.
This localisation promotes remineralisation of enamel with fluorapatite
Mineralogical study revealed that Dilband iron ore is mainly composed of 46.27% hematite, 17.41% quartz 14.47% calcite, 9.24% Chlinochlore, 10.5% kaolinite, and 1.75% fluorapatite
Also in the flat were specimens of hemimorphite crystals on pale green, opaque fluorapatite
, the latter pseudomorphically replacing tarbuttite, an unusual combination.
This study reports for the first time in vitro and in vivo properties of fluorapatite
(FA)-forming calcium phosphate cements (CPCs).
(a) : calcium chloride phosphate hydroxide (hydroxylapatite chlorian [Ca.sub.5][(P[O.sub.4]).sub.3](OH.Cl.F)), (+) : calcium fluoride phosphate (fluorapatite
, [Ca.sub.5][(P[O.sub.4]).sub.3],F), (b) : calcium phosphate hydroxide (hydroxylapatite, [Ca.sub.5][(P[O.sub.4]).sub.3](OH)), (c) : calcium fluoride carbonate phosphate hydroxyde (carbonatefluorapatite [Ca.sub.10][(P[O.sub.4]).sub.5] C[O.sub.3][F.sub.1.5][(OH).sub.0.5]) y *: calcium carbonate phosphate hydroxyde (carbonatehydroxylapatite [Ca.sub.10] [(P[O.sub.4]).sub.3]C[O.sub.3][(OH).sub.2]).
Biomaterials commonly used in tissue engineering Biopolymers Natural Alginate Synthetic Poly(glycolic acid), Collagen Poly(lactic acid) Chitosan and their co-polymers Hyaluronic acid Poly([epsilon]-caprolactone) Poly Poly(dioxanone) (hydroxybutyrate) Polyethylene oxide /polybutylene teraphthalate co-polymers Poly(propylene Bioceramics fumarate) Hydroxyapatite and other types of calcium phosphate like fluorapatite
or tricalcium phosphate Biphasic hydroxyapatite/ tricalcium phosphate ceramics Bioactive glass ceramics Tab.