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- W1958834944 abstract "Neovascularization is essential for bone regeneration in fractures. This study aimed to investigate the microvascular morphology and distribution in the non-injured femur and the neovascularization of the metaphyseal critical size defect in a small animal model of osteoporosis.Female rats (n=7) were ovariectomized (OVX) and received a multideficiency diet. Three months after OVX, a 5mm wedge shaped critical size defect was cut at the distal femoral metaphysis and stabilized with a T-shaped mini-plate. After six weeks, the animals were euthanized, and femora were removed and decalcified for micro-CT measurement of fracture neovascularization.No fracture healing was observed along the critical size defects. In the non-injured bone, micro-vessel distribution showed a specific pattern, thereby enabling a differentiation between epi-, meta- and diaphysis. Micro-CT based morphometry revealed a significant reduction of the vascular volume fraction as well as the vascular thickness (p<0.001) in the critical size defect compared to the intact contralateral femur. Blood volume related vascular surface (vascular surface/volume) increased significantly (p<0.001). Connectivity density and tissue volume related vascular surface (vascular surface density) did not change significantly.Micro-CT based vascular morphometry demonstrated differences between epi-, meta- and diaphysis in the non-injured bone as well as differences between the critical size defect and the non-injured metaphysis. As angiogenesis is a crucial prerequisite that precedes osteogenesis, our results may influence further evaluation of osteoconductive or osteogenic biomaterials in this small animal model of osteoporosis." @default.
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- W1958834944 date "2016-05-01" @default.
- W1958834944 modified "2023-10-17" @default.
- W1958834944 title "Neovascularization of osteoporotic metaphyseal bone defects: A morphometric micro-CT study" @default.
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- W1958834944 doi "https://doi.org/10.1016/j.mvr.2015.10.005" @default.
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