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The GBR principle was first examined by Dahlin et al. in 1988 on rats. The selective ingrowth of bone-forming cells into a bone defect region could be improved if the adjacent tissue is kept away with a membrane; this was confirmed in a study by Kostopoulos and Karring in 1994. GBR can be used for bone regeneration on exposed implant coils . [4]
Decortication is a medical procedure involving the surgical removal of the surface layer, membrane, or fibrous cover of an organ.The procedure is usually performed when the lung is covered by a thick, inelastic pleural peel restricting lung expansion.
Such procedures may also be referred to as accelerated osteogenic orthodontics (AOO), periodontally accelerated osteogenic orthodontics (PAOO), corticotomy-assisted orthodontic treatment (CAOT), selective alveolar decortication (SAD), or corticotomy-facilitated orthodontics (CFO) a.k.a. speedy orthodontics. [2]
Bone tissue is removed by osteoclasts, and then new bone tissue is formed by osteoblasts. Both processes utilize cytokine (TGF-β, IGF) signalling.In osteology, bone remodeling or bone metabolism is a lifelong process where mature bone tissue is removed from the skeleton (a process called bone resorption) and new bone tissue is formed (a process called ossification or new bone formation).
Bone tissue is a dynamic system with active metabolism. [24] Bone tissue remodelling or bone remodeling is a successive chain of old bone matrix removal and its replacement with a new one. [25] These processes make a child’s skeleton grow and extend, while childhood is characterized by bone tissue growth rather than its resorption.
These methods include measuring waist circumference, determining the waist-to-hip ratio or using special equipment, such as a DEXA scan, which measures bone density, to figure out body fat percentage.
Bone decalcification is the softening of bones due to the removal of calcium ions, and can be performed as a histological technique to study bones and extract DNA. [ 1 ] [ 2 ] This process also occurs naturally during bone development and growth, and when uninhibited, can cause diseases such as osteomalacia .
A year after returning to Earth, the astronauts on average exhibited 2.1% reduced bone mineral density of the tibia - one of the bones of the lower leg - and 1.3% reduced bone strength. Nine did ...