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bone remodeling period
In bone physiology, the bone remodeling period describes the temporal duration (i.e. lifespan) of the basic multicellular unit (BMU) that is responsible for bone turnover. Historically, this was referred to as the sigma (σ) or sigma period,〔Frost, HM. Tetracycline-based histological analysis of bone remodeling. ''Calc Tiss Res'' 1969;3:211-237.〕 but the terminology is now outdated.
==Bone remodeling==
Although bone may appear superficially as a static tissue, it is actually very dynamic, undergoing constant remodeling throughout the life of the vertebrate organism. This occurs with the synchronized action of osteoclasts and osteoblasts, cells that resorb and deposit bone, respectively. Bone remodeling also occurs in response to trauma, such as that following accidental bone fracture or the placement of dental implants into the jaw bones.
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