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Bone : Distal Radius Fracture Essay

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Bone: Distal radius fracture, non-displaced, in a healthy middle-age adult.
The primary cellular components of bone tissue are osteoblasts and osteocytes, and these are distinguished by their location and their function.1 The osteoblast is the bone-forming cell that eventually becomes an osteocyte. During this intermediate changeover, the cells are referred to as intermediate cells. “Bone matrix is comprised of three elements: organic, mineral, and fluid. Organic components constitute 39% of the total bone volume, which contains 95% type I collagen and 5% proteoglycans. Minerals include primarily calcium hydroxyapatite crystals and contribute about half of total bone volume.”1 Within the matrix, collagen fibers are responsible for providing tensile strength. Eventually, calcification and ossification of the fibrous matrix forms individual bony trabeculae that together constitute a primary ossification center.2 The arrangement of the collagen/trabeculae along the length of the bone give the bone its tensile strength; the resistive strength against bending/breaking.1,2 The density of the bone is provided by calcium salts which are necessary to provide resistive strength against compressive forces, such as load/weight bearing activities.1 Stresses from weight bearing and using muscles provide the necessary stimulus for the formation and organization of collagen/trabeculae to form architecturally strong bones. Typically, when no injury or disease is present, bone

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