apatite


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ap·a·tite

(ap'ă-tīt),
Generic name for a class of minerals with compositions that are variants of the formula D5T3M, where D is a divalent cation, T is a trivalent tetrahedral compound ion, and M is a monovalent anion; calcium phosphate apatites are important mineral constituents of bones and teeth. See: hydroxyapatite.

apatite

[ap′ətīt]
Etymology: Gk, apate, deceit
an inorganic mineral composed of calcium and phosphate that is found in the bones and teeth.

ap·a·tite

(ap'ă-tīt)
A class of naturally occurring crystalline minerals containing calcium and phosphorus; hydroxyapatite is a component of bones and teeth.
See also: fluorapatite, hydroxyapatite

ap·a·tite

(ap'ă-tīt)
Generic name for a class of minerals with compositions that are variants of the formula D5T3M, where D is a divalent cation, T is a trivalent tetrahedral compound ion, and M is a monovalent anion; calcium phosphate apatites are important mineral constituents of bones and teeth.

apatite (ap´ətīt),

n the inorganic mineral substance of teeth and bone. See also carbonate hydroxyapatite.

apatite

1. calcium phosphate; one of the two mineral constituents of bones and teeth.
2. fluorapatite; a naturally occurring rock mineral containing fluorine.

apatite calculi
see apatite urolith.
References in periodicals archive ?
Nanobacteria in the mitral valve can cause calcium phosphate calcifications (local calciphylaxis) in the form of carbonate apatite in a patient on continuous ambulatory peritoneal dialysis who has increased blood calcium concentration and phosphorus concentration product.
Crack Stiffness Bone growth sensitivity (MPa) (a) (b) (c) Control apatite 7 112 7 2 7 Complex organoapatite 3 129 11 4 14 Note: Bone growth measured by fluorescence at (a) 355 to 425 nm, (b) 450 to 490 nm, and (c) 390 to 490 nm.
Briefly, the main stages of concentration start with three-stage crushing to 80% minus-16 mm, blending, grinding (in rod and ball mills) to 35% minus-74 micron, selective flotation, first of apatite and then calcite concentrates, thickening and filtration.
The X-ray phase analysis confirmed that all the synthesized compounds were single-phase samples containing only apatite phases, and no reflections corresponding to any impurity were detected (Fig.
Only apatite present in minor amounts and usually forming grains < 0.
Source of trace elements in human body is via ingestion of food or on exposure to the environment, incorporated into the apatite structure of the enamel.
Kwong Pui Ho (John Ho), Yangon, Myanmar, for assorted Ammolite, chrome tourmaline, hackmanite, thorite and ruby-in-quartz; rough amber, apatite, corundum, gypsum, jadeite, mica, moonstone, pollucite and tourmaline; crystals of spinel and zircon; cabochons of hematite, kyanite, opal and pargasite; and faceted quartz, spinel and tanzanite.
In order to improve osseointegration various surface modification techniques such as plasma spraying [6], magnetron sputtering [7], acid and alkali treatments [8], bioactive hydroxyl apatite coating [9], anodic oxidation [10] have been employed.
The composition provides an inhibition of bacterial adhesion to an apatite test plate analyzed by scanning electron microscopy.
The coralline hydroxy apatite replicated from the exoskeleton of porites [Coralline Hydroxy Apatite Porites (CHAP)] consists of 230-[?
Scales and spines of different morphological groups and variable histologies of the genus Nostolepis have been selected for this purpose in order to compare data from fossil apatite biomineral of different hard tissue structure and crystallinity, while avoiding any potential intertaxonomic bias.