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Related to hydroxylapatite: hydroxyapatite, hydroxyapatite crystal


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 ?
To our knowledge, the preservation of the F-containing carbonate hydroxylapatite phase in fossils as old as almost 500 million years has previously not been documented.
Over time the RADIESSE Voice implant carrier gel is resorbed and the Calcium Hydroxylapatite particles support in-growth of new collagen.
Composed of calcium hydroxylapatite (CaHA) microspheres suspended in an aqueous gel, Radiesse both fills and stimulates the body to produce new collagen for immediate results that last about one year or more.
2001): "Sol-gel Derived Hydroxylapatite Coatings for Medical Applications, Surface Modification Technologies on CD (ASM International).
A retrospective review of two multicenter prospective studies was performed of a dual radius design acetabular shell, one with a titanium arc deposited surface roughening and hydroxylapatite coating (AD HA) designed to optimize initial component stability and enhance biological fixation and the other grit-blasted and HA (GB HA) coated.
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.
After overnight incubation at 4[degrees]C, we added 33% hydroxylapatite (HAP) slurry [Fast Flow Hydroxylapatite (Calbiochem, San Diego, CA, USA) in 10 mM Tris pH 8.
Injections of autologous fat, autologous chondrocytes harvested from the ear, or calcium hydroxylapatite also have shown promise but are still considered investigational.
But when the larynx loses its tone, a hydroxylapatite implant may be the best solution.
Evaluation of Injectable Calcium Hydroxylapatite for the Treatment of Facial Lipoatrophy Associated with Human Immunodeficiency Virus" (A.
He was treated twice by another physician with calcium hydroxylapatite injection into the immobile vocal fold, but his aphonia persisted.
Innovations like synthetically-obtained Hydroxylapatite, poly N-isopropylacrylamide and bone morphogenic protein 2 show promise, but none hold the magic formula to a bioabsorbable substance that can retain a product's structural and mechanical integrity.