News tagged with hydroxyapatite
Hydroxylapatite
Hydroxylapatite, also called hydroxyapatite (HA), is a naturally occurring mineral form of calcium apatite with the formula Ca5(PO4)3(OH), but is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two entities. Hydroxylapatite is the hydroxyl endmember of the complex apatite group. The OH- ion can be replaced by fluoride, chloride or carbonate, producing fluorapatite or chlorapatite. It crystallizes in the hexagonal crystal system. Pure hydroxylapatite powder is white. Naturally occurring apatites can, however, also have brown, yellow, or green colorations, comparable to the discolorations of dental fluorosis.
Up to 50% of bone is made up of a modified form of the inorganic mineral hydroxylapatite (known as bone mineral). Carbonated calcium-deficient hydroxylapatite is the main mineral of which dental enamel and dentin are comprised. Hydroxylapatite crystals are also found in the small calcifications (within the pineal gland and other structures) known as corpora arenacea or 'brain sand'.
For more information about Hydroxylapatite, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Lungfish teeth could hold key to better cars, planes
(PhysOrg.com) -- The tooth enamel of lungfish and garfish could provide the basis for new material to make lighter more efficient aircraft or vehicles, says a Queensland University of Technology (QUT) physics ...
Nov 29, 2010 |
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Researchers develop more reliable, less expensive synthetic graft material
With a failure rate as high as 50 percent, bone tissue grafts pose a significant obstacle to orthopedic surgeons attempting to repair complex fractures or large areas of bone loss, such as those often caused by trauma and ...
Oct 22, 2010 |
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Building better bone replacements with bacteria
Bacteria that manufacture hydroxyapatite (HA) could be used to make stronger, more durable bone implants. Professor Lynne Macaskie from the University of Birmingham this week (7-10 September) presented work to the Society ...
Sep 07, 2009 |
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Can a new implant coating technique create a new six million dollar man?
Tel Aviv University researcher Prof. Noam Eliaz of the TAU School of Mechanical Engineering has developed an electrochemical process for coating metal implants which vastly improves their functionality, longevity ...
Nanotechnology / Bio & Medicine
Jun 29, 2009 |
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Search results for hydroxyapatite
Glass sponges inspire: Hybrid material made of collagen fibers and silica as possible substrate for bone tissue culture
(PhysOrg.com) -- As well as organic structures, mineral structures also play an important role in living organisms. You dont even have to go as far as seashells or the artful silica scaffolds of diatoms; ...
Nov 14, 2011 |
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Smart materials that get bone to heal
Bone tissue is very good at self-healing, but in many situations the natural healing process is not sufficient. In a dissertation at Uppsala University, Sonya Piskounova shows how functional materials that ...
Nov 04, 2011 |
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The brittleness of aging bones -- more than a loss of bone mass
It is a well-established fact that as we grow older, our bones become more brittle and prone to fracturing. It is also well established that loss of mass is a major reason for older bones fracturing more readily ...
Aug 29, 2011 |
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New technique makes artificial bones more natural
A new technique for producing artificial bone implants has been developed by Korean researchers. By mimicking natural bone, it is hoped the implant material will better complement the natural regeneration ...
Jun 22, 2011 |
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Biodegradable tooth-binding micelles inhibit Streptococcus mutans biofilm growth
Today, during the 89th General Session & Exhibition of the International Association for Dental Research, held in conjunction with the 40th Annual Meeting of the American Association for Dental Research and the 35th Annual ...
Mar 19, 2011 |
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Does fluoride really fight cavities by 'the skin of the teeth'?
In a study that the authors describe as lending credence to the idiom, "by the skin of your teeth," scientists are reporting that the protective shield fluoride forms on teeth is up to 100 times thinner than previously believed. ...
Mar 02, 2011 |
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Biomimetic patch to be tested on tricky tendon-to-bone repairs
Two Washington University in St. Louis scientists are imitating nature as they attempt to solve one of the most difficult problems in orthopedic surgery: reattaching tendon to bone.
Feb 28, 2011 |
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Does fluoride really fight cavities by 'the skin of the teeth?'
In a study that the authors describe as lending credence to the idiom, "by the skin of your teeth," scientists are reporting that the protective shield fluoride forms on teeth is up to 100 times thinner than previously believed. ...
Dec 15, 2010 |
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Mammoth Achievement: Researchers at the forefront of molecular biology
Forget Jurassic Park. By successfully sequencing the DNA of a long-extinct species, Stephan Schuster and Webb Miller have helped push back the boundaries of molecular biology.
Jan 26, 2010 |
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Using Nanotechnology to Boost the Lifespan of Medical Implants
(PhysOrg.com) -- UConn engineering researchers are developing a new family of implant materials.
Nanotechnology / Nanomaterials
Jan 08, 2010 |
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List of search results for hydroxyapatite