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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


/hy·drox·yl·ap·a·tite/ (hi-drok″sil-ap´ah-tīt) 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.
References in periodicals archive ?
Over time the RADIESSE Voice implant carrier gel is resorbed and the Calcium Hydroxylapatite particles support in-growth of new collagen.
Boyd Gillespie, et al, Effectiveness of Calcium Hydroxylapatite Paste in Voice Rehabilitation.
Autologous fat can be used, but more demand is being seen for calcium hydroxylapatite microsphere (Radiesse) fillers, said Dr.
He was treated twice by another physician with calcium hydroxylapatite injection into the immobile vocal fold, but his aphonia persisted.
CHICAGO -- Calcium hydroxylapatite provided excellent clinical results and was well tolerated over 12 months in the largest prospective study to date of vocal cord insufficiency, Dr.
Temple hollows can also be filled with calcium hydroxylapatite, poly-L-lactic acid and less often with hyaluronic acid to revolumize and create a lift of the lateral brow.
5) The compound is made up of calcium hydroxylapatite particles suspended in a carboxymethylcellulose gel.
Radiesse is a synthetic, injectable implant composed of calcium hydroxylapatite microspheres (diameter range, 25 to 45 [micro]m) suspended in an aqueous gel carrier.
Radiesse is made of smooth calcium hydroxylapatite (CaHA) microspheres, which have a diameter range of 25[micro]m to 45[micro]m, suspended in an aqueous gel carrier.