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Encyclopedia > Osteoid

Osteoid is a protein mixture which is secreted by osteoblasts. When it mineralizes, it becomes bone. Osteoid is primarily composed of Type I collagen. A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... In chemistry, a mixture is the product of a mechanical blending or mixing of chemical substances like elements and compounds, without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup. ... An osteoblast (from the Greek words for bone and to build) is a mononucleate cell which produces a protein that produces osteoid. ... Grays Anatomy illustration of a human femur. ... Tropocollagen triple helix. ...


When there is insufficient mineral or osteoblast dysfunction, the osteoid does not mineralize properly, and it accumulates. This process is called osteomalacia. Osteomalacia, when present in children, is defined as rickets. To meet Wikipedias quality standards, this article may require cleanup. ...


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  Results from FactBites:
 
Bonetumor.org - The Web's Most Comprehensive Bone Tumor Resource (451 words)
Osteoid Osteoma is a benign bone lesion with a nidus of less than 2 cm surrounded by a zone of reactive bone.
The classic radiological presentation of an osteoid osteoma is a radiolucent nidus surrounded by a dramatic reactive sclerosis in the cortex of the bone.
On gross examination, osteoid osteoma is a brownish-red, mottled and gritty lesion that is distinct from the surrounding bone.
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