Noun
hydroxyapatite (countable and uncountable, plural hydroxyapatites)
A basic calcium phosphate mineral that is the principal inorganic constituent of bone and teeth.
Above 30% of the acellular part of bone consists of the organic components, and 70% of salts.sfn The strands of collagen give bone its tensile strength, and the interspersed crystals of hydroxyapatite give bone its compressional strength. Source: Internet
Bone and teeth enamel The main component of bone is hydroxyapatite as well as amorphous forms of calcium phosphate, possibly including carbonate. Source: Internet
Most hydroxyapatite ceramics are very porous and lack mechanical strength, and are used to coat metal orthopedic devices to aid in forming a bond to bone or as bone fillers. Source: Internet
Work is being done to make strong, fully dense nanocrystalline hydroxyapatite ceramic materials for orthopedic weight bearing devices, replacing foreign metal and plastic orthopedic materials with a synthetic, but naturally occurring, bone mineral. Source: Internet
The rub is that are a number of calcium supplements and all have many advantages, and the only one, it seems, that doesn't have a disadvantage is Microcrystalline Hydroxyapatite Concentrate 25% calcium. Source: Internet