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Calcium hydroxyapatite
83%
312/376
Osteocalcium phosphate
1%
4/376
Calcium pyrophosphate
15%
56/376
Osteocalcin
0%
1/376
Polymethylmethacrylate
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The chemical structure of hydroxyapatite is Ca10(PO4)6(OH)2. Hydroxyapatite 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. Up to 50% of bone by weight is made up of a modified form of hydroxyapatite. It is one of few materials that will support bone ingrowth and osseointegration when used in orthopaedic, dental and maxillofacial applications.
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