hydroxylapatite

(redirected from Calcium hydroxyapatite)
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hy·drox·y·ap·a·tite

(hī-drok'sē-ap'ă-tīt),
A natural mineral structure that the crystal lattice of bones and teeth (that is, amorphous hydroxyapatite) closely resembles; used in chromatography of nucleic acids; also found in pathologic calcifications (for example, atherosclerotic aortas).
Synonym(s): hydroxylapatite

hydroxylapatite

/hy·drox·yl·ap·a·tite/ (hi-drok″sil-ap´ah-tīt) hydroxyapatite.

hydroxyapatite

, hydroxylapatite (hī-drok″sē-ap′ă-tīt″) (″sĭ-lap′ă-tīt″) [ hydro- + ²oxy- + apatite ]
Ca10(PO4)6(OH)2; the calcium- and phosphorus-containing compound that constitutes the bulk of the mineral structure of bones and teeth. In teeth it is soluble in the acids of soft drinks or carbohydrate fermentation, but it becomes decay-resistant fluoroapatite after combining with fluoride ions present in fluoridated water or fluoride toothpastes. Under some circumstances, it can deposit in and around joints, producing periarthritis or calcific tendinitis.
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References in periodicals archive ?
Involvement of the neck flexor pair, longus colli, with crystalline deposition of calcium hydroxyapatite triggers an inflammatory response which can produce a fluid collection in the retropharyngeal/ prevertebral spaces and causes edematous change to the muscles.
Acute calcific longus colli tendonitis
Treatment of juxta-articular intraosseous cystic lesions in rheumatoid arthritis patients with interconnected porous calcium hydroxyapatite ceramic.
A preliminary study on the development of type-I collagen-glycosaminoglycan (GAG) gel coated hydroxyapatite ceramics for tissue engineering
Although CPPD is the most common cause of radiographic signs in chondrocalcinosis, both CPPD and calcium hydroxyapatite can be present.
Imaging of crystal deposition diseases
Tonsilloliths are composed of calcium hydroxyapatite and calcium carbonate with other minerals including phosphorus, ammonia and magnesium (1).
Giant tonsillolith--a rare cause of dysphagia
Tung, Preparation and comprehensive characterization of a calcium hydroxyapatite reference material, J.
Diffusion of ions between two solutions saturated with respect to hydroxyapatite: a possible mechanism for subsurface demineralization of teeth
The synthetic biodegradable polymer/ interconnected-porous calcium hydroxyapatite ceramics (IP-CHA) composite is an excellent combination carrier/scaffold delivery system for recombinant bone morphogenetic protein-2 (rhBMP-2), that strongly promotes the clinical effects of rhBMP-2 in bone tissue regeneration (67).
Orthopaedic applications of bone graft & graft substitutes: a review
Interaction of cadmium ions with calcium hydroxyapatite crystals: a possible mechanism contributing to the pathogenesis of cadmium-induced bone diseases.
Natural and synthetic apatites as sorbents for [Cd.sup.2+] and [Cr.sup.3+] ions from aqueous solutions/Looduslikud ja sunteetilised apatiidid [Cd.sup.2+] ja [Cr.sup.3+] ioonide sidujatena vesilahustest
The inorganic components of the bone matrix, 60% of dry weight bone, is composed of calcium phosphate and calcium hydroxyapatite, which are responsible for the compression strength of bone.
Bone-building ingredients: adequate intakes of nutrients composing the bone matrix and regulating bone metabolism appear necessary to maintain bone health and prevent bone disorders and diseases
The effects of serum and human albumin on calcium hydroxyapatite crystal growth.
Effects of LDL, cholesterol, and their oxidized forms on the precipitation kinetics of calcium phosphates
These include: Vitamin E (400 to 800 IU daily) to help reduce hot flushes and night sweats; Calcium (1,500mg daily) - the best type of calcium is not calcium carbonate which may not be fully absorbed, but microcrystalline calcium hydroxyapatite calcium (MCHC) or calcium citrate; Magnesium (500mg to 750mg daily) is essential to help with the absorption of calcium; Vitamin C (1,000mg to 2,000mg daily) helps absorption of Vitamin E and decreases capillary fragility.
CHANGE TO A MORE NATURAL LIFESTYLE
Calcium carbonate and calcium hydroxyapatite are less well absorbed than calcium citrate.
Health on a shoestring: evaluating your supplements
Enamel is mainly composed of calcium hydroxyapatite (HAp), and can have variety of ionic and cationic substitutions (sodium, magnesium and zinc)in its structure.
Zinc: A precious trace element for oral health care?

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