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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
Farlex Partner Medical Dictionary © Farlex 2012


, 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 ?
Chen et al., "A comparative study on the dissolution and solubility of hydroxylapatite and fluorapatite at 25[degrees]C and 45[degrees]C," Chemical Geology, vol.
Audiometric outcomes of tympanoplasty with hydroxylapatite prosthesis: Consultant versus trainees.
Effect of Ti ion substitution on the structure of hydroxylapatite. J Euro Cer Soc.
Voigts, "An investigation of changes in physical properties of injectable calcium hydroxylapatite in a carrier gel when mixed with lidocaine and with lidocaine/epinephrine," Dermatologic Surgery, vol.
Biomechanical and histological studies of particulate hydroxylapatite implanted in femur bone defects of adult dogs.
[20.] Grigor'ian AS (1994) An experimental study of action of an intraosseous implant of hydroxylapatite ceramic granules on the process of reparative bone formation (experimental morphological research).
The effects of sample treatment and diagenesis on the isotopic integrity of carbon in biogenic hydroxylapatite. Journal of Archaeological Science 24:417-29.
aeruginosa KKA-5 was purified by 518-fold with a specific activity of 2238.16 U [mg.sup.-1] protein using ammonium sulphate precipitation followed by hydroxylapatite column chromatography.
Current technology for P recovery from domestic wastewater mainly adopted chemical precipitation and the commonly used processes were the two types of struvite (N[H.sub.4]MgP[O.sub.4], MAP) (Cusick, Logan 2012; Ichihashi, Hirooka 2012) and hydroxylapatite ([Ca.sub.10][(P[O.sub.4]).sub.6][(OH).sub.2], HAP) (Zou et al.