Osteon


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osteon

[′äs·tē‚än]
(histology)
A microscopic unit of mature bone composed of layers of osteocytes and bone surrounding a central canal. Also known as Haversian system.

Osteon

 

(also haversian system), a system in the bones of vertebrates and man that consists of from five to 20 lamellae arranged concentrically around a haversian canal. It is the structural unit that gives strength to compact bone. Osteons are interspersed with interstitial lamellae. (SeeHAVERSIAN CANALS.)

References in periodicals archive ?
These constituents are organized into primary lamellar bone and Haversian systems or osteons, which serve to nourish compact bone and represent bone's basic structural unit.
PFCs are fluorescent calcium chelating agents taken up by live maturing osteoid and remain until the osteon is resorbed.
There are 4 ways of osteon arrangement in a long bone's compact tissue of guineafowls: as zones, islands, scattered, and interspersed with circulatory-parallel structures.
INTRODUCTION: The word osteomyelitis originates from the ancient Greek words osteon (Bone) and mylinos (Marrow) and means infection of medullary portion of the bone, osteomyelitis was first described in 1852 by a French surgeons Edouard Chassaignac.
At this stage of the experiment intense neoangiogenesis is observed in the regenerated bone, as well as the phase of organogenesis and bone tissue remodeling, as evidenced by the reorganization of rough-fibred bone tissue trabeculae into primary osteon structures (Figure 2, b).
Regressive changes in the compact tissues are also confirmed by dilatation of less-mineralized bone material, internal and external surrounding plates while simultaneous narrowing of osteon layer.
Ong, "Clinical evaluations of OSTEON as a new alloplastic material in sinus bone grafting and its effect on bone healing," Journal of Biomedical Materials Research B: Applied Biomaterials, vol.
[5] The word osteoporosis is derived from the Greek word osteon for bone and poros for porosity indicating that the bone becomes more porous.
The underlying principle of osteopathy is that the bone (osteon) is the place for physicians to begin to discover the real cause of a disease.
Eight weeks after surgery, more irregular osteon formation was observed in the group treated with nanohydroxyapatite/chitosan composites compared with those treated with pure chitosan.
However, microcracks in the range 150-300 [micro]m continued to grow after encountering a cement line surrounding an osteon. Only microcracks greater than 300 [micro]m were obverted to cause failure [7].
The term "osteopetrosis" (from the Ancient Greek [TEXT NOT REPRODUCIBLE IN ASCII], osteon = bone, + [TEXT NOT REPRODUCIBLE IN ASCII], petros = stone) defines a number of monogenic disorders characterized by increased bone density due to failure in bone resorption by the osteoclasts, large multinucleated cells of hematopoietic origin.