
	Where results make sense

Topic: Hydroxyapatite

In the News (Sat 26 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Hydroxyapatite Crystal Disease Causes, Symptoms, Diagnosis, and Treatment by MedicineNet.com
		Hydroxyapatite is the major component, and an essential ingredient, of normal bone and teeth.
		However, hydroxyapatite crystals are distinctly different from the crystals of pseudogout or gout.
		Sometimes, hydroxyapatite crystals can be seen clumped in the fluid of a joint that has developed arthritis.
	www.medicinenet.com /hydroxyapatite/article.htm (507 words)

	What's hydroxyapatite?
		Hydroxyapatite is chemically similar to the mineral component of bones and hard tissues in mammals.
		Coatings of hydroxyapatite are often applied to metallic implants (most commonly titanium/titanium alloys and stainless steels) to alter the surface properties.
		Hydroxyapatite may be employed in forms such as powders, porous blocks or beads to fill bone defects or voids.
	web.nmsu.edu /~prokop/hpa/def.htm (254 words)

	Professor Brown
		Hydroxyapatite monoliths have mechanical integrity and, therefore, can emulate certain functions of hard tissues serve as models for hard tissues, or serve as substrates on which cellular functions can proceed The rationale for investigating monolithic hydroxyapatite is twofold.
		Firstly, hydroxyapatite which can be formed in vivo may eventually serve a variety of needs in orthopaedics, plastic and reconstructive surgery, and dentistry; interest has been expressed by clinicians regarding in vivo formation.
		In unsubstituted hydroxyapatite, the porosity tends to be monodisperse, and we can produce material which has strengths comparable to sintered hydroxyapatite having the equivalent total porosity.
	www.bioe.psu.edu /faculty/brown.html (868 words)

	Hydroxyapatite - Properties and Applications (Site not responding. Last check: 2007-10-19)
		The chemical nature of hydroxyapatite lends itself to substitution, meaning that it is not uncommon for non-stoichiometric hydroxyapatites to exist.
		Hydroxyapatite is a thermally unstable compound, decomposing at temperature from about 800-1200°C depending on its stoichiometry (see above).
		Generally speaking dense hydroxyapatite does not have the mechanical strength to enable it to succeed in long term load bearing applications.
	www.azom.com /details.asp?ArticleID=107 (358 words)

	Hydroxyapatite Composite Biomaterials — Evolution and Applications
		It is a composite of hydroxyapatite (HA) in high density polyethylene, which mimics bone, itself a composite of hydroxyapatite in collagen.
		In a hip prosthesis, the ball of the natural hip joint is replaced with a metal ball on the end of the stem, which extends down the shaft of the bone.
		Implants have to be trimmed to fit the patient, however, and with all-hydroxyapatite implants, this is extremely difficult.
	www.azom.com /details.asp?ArticleID=1718 (1285 words)

	Hydroxyapatite Nanoparticle Synthesis and In-Vitro Study of Dentinal Tubule Occlusion
		For the first time we are presenting our results on the use of nanoparticles of hydroxyapatite for the infiltration of dentine tubules as a new method of achieving tubule occlusion for the proposed long term prevention of hypersensitivity.
		Examination by scanning electron microscopy revealed tubule occlusion using both nano-silica suspensions and hydroxyapatite which was in the form of nano-rods with maximum length 200nm and width 50 nm.
		Dual beam focussed ion beam lithography, and the construction of a 3D model from individual sections, is demonstrated as a valuable new technique for determining the depth of tubule infiltration.
	www.nsti.org /Nanotech2006/showabstract.html?absno=310 (290 words)

	Calcium Hydroxyapatite
		Calcium Hydroxyapatite is a freeze-dried (cold processed) source of concentrated calcium obtained from New Zealand.
		Hydroxyapatite supplies calcium in the form it occurs in the body.
		The microcrystalline structure of calcium hydroxyapatite gives a large surface area from which the minerals may be released from the organic matrix in the intestine.
	www.naturalways.com /calciumHydroxyapatite.htm (492 words)

	Brian Leatherbarrow, FRCS, FRCOphth
		Porous hydroxyapatite is a complex calcium phosphate salt, made from coral, which is similar to human cancellous (spongy) bone with interconnecting tunnels and no dead-ends.
		The porous hydroxyapatite implant can be directly coupled with the artificial eye to improve movement by means of a small peg, which fits into a hole drilled through the conjunctiva (the pink membrane which lines the socket) and into the buried implant.
		It is necessary for the hydroxyapatite implant to be fully ingrown with blood vessels (vascularised) prior to the drilling procedure for the fitting of the motility peg.
	www.eyelidsurgery.co.uk /treatments/blb-coralimplant.htm (2602 words)

	Immobilization of Nickel and Other Metals in Contaminated Sediments by Hydroxyapatite Addition (Site not responding. Last check: 2007-10-19)
		Hydroxyapatite was added to the sediments at application rates of 0, 5, 15.8, and 50 g kg
		Hydroxyapatite was effective at reducing the solubility of U and, to a lesser degree, Ni.
		Hydroxyapatite effectiveness was somewhat reduced in the presence of soluble organics that likely increased contaminant metal solubility through complexation.
	www.uga.edu /srel/Reprint/2516.htm (284 words)

	HA Ultrogel® Hydroxyapatite Chromatography Sorbent
		Hydroxyapatite chromatography is considered to be a “pseudo-affinity” chromatography, or “mixed-mode” ion exchange.
		HA Ultrogel hydroxyapatite sorbent is composed of cross-linked agarose beads with microcrystals of hydroxyapatite entrapped in the agarose mesh.
		Hydroxyapatite crystals are naturally resistant to most chemical agents, except solutions with a pH less than 4 and complexing agents.
	www.pall.com /datasheet_biopharm_35681.asp (584 words)

	Analysis of the Molar Calcium to Phosphorous Ratio in Hydroxyapatite (Site not responding. Last check: 2007-10-19)
		Hydroxyapatite (HA), Ca is an important biomaterial, as it is able to bond chemically to bone.
		In clinical applications of dental reconstruction and hip replacement, hydroxyapatite has found wide and accepted use as a source material for plasma sprayed, bonelike coatings deposited onto metallic substrates.
		The evacuated spectrometer, which is completely enclosed in a temperature stabilized unit, is operated with a chromium X-ray source, an RAP analyzing crystal and a flow proportional counter, providing best performance and precision for lighter elements like calcium and phosphorous.
	www.camet-lab.com /Ca-HA.htm (255 words)

	Hydroxyapatite Glossary of Terms with Definitions on MedicineNet.com
		The following are health and medical definitions of terms that appear in the Hydroxyapatite Crystal Disease article.
		It is hydroxyapatite that gives bones and teeth their rigidity.
		Hydroxyapatite crystal disease :The inflammation caused by hydroxyapatite crystals has been referred to as hydroxyapatite crystal disease.
	www.medicinenet.com /hydroxyapatite/glossary.htm (1140 words)

	Patient: Hydroxyapatite: the natural choice (Site not responding. Last check: 2007-10-19)
		A remarkable similarity was noticed between the porous structure of certain coral species and that of human bone.
		Soon after this discovery, a method was developed to transform the mineral in coral to match that of human bone, known as hydroxyapatite (abbreviated HA).
		The first orbital implant made of hydroxyapatite was implanted in 1985, after several years of preliminary research.
	www.ioi.com /patient/ha.html (224 words)

	Hydroxyapatite — Synthesis of Hydroxyapatite Powders
		For this reason, it is not uncommon for biomedical companies to synthesise their own powders.
		Hydroxyapatite powders can be synthesised via numerous production routes, using a range of different reactants.
		The resulting hydroxyapatite is carbonate substituted, but commonly well crystallised and chemically homogeneous.
	www.azom.com /details.asp?ArticleID=1519 (443 words)

	Hydroxyapatite Bioceramic Bone
		Kalita, S.J. Synthesis of nano-size hydroxyapatite (HAp) powders by mechanical alloying.
		Kalita, S.J. Synthesis and sintering studies of nanocrystalline hydroxyapatite powders doped with magnesium and zinc.
		With the increase in average age of the human population, the challenge of treating bone defects and repairs is rising and overall orthopedic market is growing.
	pegasus.cc.ucf.edu /~samar/Abstracts.htm (1924 words)

	Disease, hydroxyapatite crystal definition - Medical Dictionary definitions of popular medical terms
		Disease, hydroxyapatite crystal:The inflammation caused by hydroxyapatite crystals has been referred to as hydroxyapatite crystal disease.
		Hydroxyapatite is a major component and an essential ingredient of normal bone and teeth, makes up bone mineral and the matrix of teeth, and gives bones and teeth their rigidity.
		If these tiny crystals of hydroxyapatite are deposited by mistake in or around joints, they may cause inflammation of the joints and nearby tissues such as the tendons and ligaments (particularly causing rotator cuff problems in the shoulder) and this is hydroxyapatite crystal disease.
	www.medterms.com /script/main/art.asp?articlekey=7432 (185 words)

	Methods of synthesizing hydroxyapatite powders and bulk materials (US5858318)
		Methods are provided for producing non-porous controlled morphology hydroxyapatite granules of less than 8 µm by a spray-drying process.
		(e) collecting the hydroxyapatite granules of step (d) wherein the concentration, viscosity and pH values of the hydroxyapatite slurry and the atomization pressure are varied to produce non-porous granules of 8 µm or less and a controlled morphology selected from the group consisting of hollow spheres and doughnuts; and
		Tanahashi et al., "Fibrous hydroxyapatite grown in the gel system: effects of pH of the solution on the growth rate and morphology" J. Mater.
	www.delphion.com /details?pn10=US05858318 (746 words)

	Calcium
		The lack of adequate calcium and the minerals necessary for calcium's proper absorption have been associated with osteoporosis, cramps, colitis, bone fractures, dental health problems, brittleness of nails, insomnia, and bruxism.
		Calcium Hydroxyapatite can help to reduce bone loss and is the most easily absorbed calcium source.
		Calcium is the most abundant mineral in the body, essential to life itself, with 99 percent of calcium found in bones and teeth.
	www.naturalways.com /calcium.htm (908 words)

	Discover the Wisdom of Mankind on hydroxyapatite (Site not responding. Last check: 2007-10-19)
		Of these different fillers, there's a new type known as hydroxyapatite that is approved by the...
		Calcium hydroxyapatite beads, used usually as missing bone replacements, can be found in...
		While these fillers are not placed directly in the lips, they add to the overall effect by filling and supporting the......
	www.blinkbits.com /blinks/hydroxyapatite (717 words)

	A peptide that inhibits hydroxyapatite growth is in an extended conformation on the crystal surface -- Long et al. 95 ...
		A peptide that inhibits hydroxyapatite growth is in an extended conformation on the crystal surface -- Long et al.
		A peptide that inhibits hydroxyapatite growth is in an extended conformation on the crystal surface
		HAP, hydroxyapatite; DRAWS, Dipolar Recoupling with a Windowless Sequence; N6, the N-terminal hexapeptide of statherin; CPMAS, cross-polarization with magic-angle spinning.
	www.pnas.org /cgi/content/full/95/21/12083 (2872 words)

	The First Hydroxyapatite Orbital Implant (Site not responding. Last check: 2007-10-19)
		The first orbital implant made of hydroxyapatite was implanted in 1985, by Dr. Arthur Perry, after several years of preliminary research.
		The eye muscles can be attached directly to this implant, allowing it to move within the orbit- just like the natural eye.
		Today, over 80,000 people worldwide have benefited from the Bio-eye orbital implant, the natural orbital implant, which is known as the Bio-eye Hydroxyapatite Orbital Implant.
	www.ioi.com /default4.htm (301 words)

	hydroxyapatite - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "hydroxyapatite" is defined.
		Hydroxyapatite : Discovering Nutrition: Interactive Glossary [home, info]
		Phrases that include hydroxyapatite: calcium hydroxyapatite deposition d, hydroxyapatite crystal disease
	www.onelook.com /?w=hydroxyapatite&ls=a (153 words)

	Bone Factors: Hydroxyapatite Formula, size: 180 capsules (Site not responding. Last check: 2007-10-19)
		For those who have already lost bone density, the proper combination of nutrients can help restore bone mass by rebuilding the organic matrix that holds minerals such as calcium and magnesium in place.
		Protecting bone mineral mass by providing a potent amount of elemental magnesium and a highly absorbable form of calcium (hydroxyapatite) that has been shown to assimilate 1.8 times better than calcium citrate.
		Maintaining the organic bone matrix with the minerals manganese, boron and phosphorous that are required for the formation of collagen and other living connective tissues.
	www.youngagain.com /hydroxyapatite1.html (609 words)

	Patient: Hydroxyapatite: the natural choice (via CobWeb/3.1 planetlab2.cs.virginia.edu) (Site not responding. Last check: 2007-10-19)
		Patient: Hydroxyapatite: the natural choice (via CobWeb/3.1 planetlab2.cs.virginia.edu)
		The goal of a more natural appearance was finally achieved with the help of a natural material: ocean coral.
		Enucleation and Evisceration: for those facing the loss of an eye.
	www.ioi.com.cob-web.org:8888 /patient/ha.html (232 words)

	Hydroxyapatite-Coated Acetabular Components : Histological and Histomorphometric Analysis of Six Cups Retrieved at ...
		What is the relation of resorption of the hydroxyapatite coating
		Degradation of the hydroxyapatite coating by osteoclasts was
		be the main reason for loss of hydroxyapatite coating.
	www.ejbjs.org /cgi/content/abstract/83/6/817 (538 words)

	Hydroxyapatite (Calcium) from Solaray
		This product is a highly advanced multi-mineral supplement based on microcrystalline Solaray Calcium hydroxyapatite derived from freeze-dried calf bone.
		The Hydroxyapatite (Calcium) Sale Price: $13.21 - Vitamins or Herbs Should be taken as directed on the bottle.
		VitaNet Is an Authorized Distributor of Hydroxyapatite (Calcium) from Solaray Products.
	vitanetonline.com /description/4579/vitamins/Hydroxyapatite-(Calcium) (225 words)

	Hydroxyapatite definition - Medical Dictionary definitions of popular medical terms (Site not responding. Last check: 2007-10-19)
		Hydroxyapatite definition - Medical Dictionary definitions of popular medical terms
		Hydroxyapatite molecules can group together (crystalize) to form microscopic clumps.
		If these tiny crystals of hydroxyapatite are deposited by mistake in or around joints, they may cause inflammation of the joints and nearby tissues, such as tendons and ligaments, particularly causing rotator cuff problems in the shoulder.
	www.medterms.com /script/main/art.asp?articlekey=7368 (175 words)

	Clarkson Chromatography - Hydroxyapatite and other Liguid Chromatography Media
		We have recently expanded our product line to include special calcium phosphate materials such as Hydroxyapatite Discs, Calcium Deficient Hydroxyapatite Discs and blocks in various sizes, as well as powders.
		These Hydroxyapatite materials, which meet JCPD standards and exceed ASTM specifications for purity, may be used as reagents, standards, or for specific dental, medical and industrial research and clinical applications.
		All standard calcium phosphate materials are characterized using x-ray diffraction (XRD) and infared (IR) spectroscopy.
	www.ccpcorp.com (241 words)

	Catalog
		USP does not have a monograph describing HAP nor Beta-TCP.
		Medical Grade hydroxyapatite conforms to ASTM Standard F1185-03, and Beta Tricalcium Phosphate conforms to ASTM F1088-04a.
		These components are used in Berkeley Advanced Biomaterials implants (see www.ostetic.com).
	www.hydroxyapatite.com /Catalog.htm (389 words)

	MicroCrystalline Hydroxyapatite Calcium - Neways.
		The other 2% can very easily come from your diet.
		ProHydroxyapatite is the best and most bioavailable form of calcium that there is. With hydroxyapatite, the form of calcium in bones, CalQlat is actually superior to any other supplement out there.
		In addition to calcium, and added vitamin D, CalQuat delivers a dynamic mineral complex featuring iron, magnesium, phosphorous, and potassium to help strengthen and protect your bones and teeth.
	www.snowcrest.net /murphyp/calcium.htm (1401 words)

	Bone Factors: Hydroxyapatite Formula, qnt: 180 capsules (Site not responding. Last check: 2007-10-19)
		BONE FACTORS: Hydroxyapatite Formula, 180 capsules, HPLC Tested
		Calcium microcrystalline hydroxyapatite is a calcium compound which contains minerals in their natural ratios, as well as residues of matrix proteins, and glycosaminoglycans.
		Calcium mircrocrystalline hydroxyapatite (MCHA) is more effect in increasing bone thickness than any other form of calcium.
	www.youngagain.com /hydfor.html (2103 words)

Try your search on: Qwika (all wikis)