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The canal network in cortical bone is an indispensable basis of bone vascularity, and its structure changes according to bone growth. Using monochromatic synchrotron radiation μCT (SRμCT), we evaluated the structural change of the canal network in growing rat tibiae and the response of this network to disuse. Tibiae were harvested from both hindlimbs of 9- and 14-week-old male Wistar rats subjected...
Mechanical loading of the skeleton is necessary to maintain bone structure and strength. Large amplitude strains associated with vigorous activity typically result in the greatest osteogenic response; however, data suggest that low-amplitude, broad-frequency vibration results in new bone formation and may enhance adaptation through a stochastic resonance (SR) phenomenon. That is, random noise may...
Rheumatoid arthritis (RA) is a disease characterized by inflammatory polyarthritis leading to destruction of the joints and reduction in bone mass. However, the relationship between bone mass and turnover is not yet clear in RA patients. To clarify the effect of bone turnover and marrow osteogenic capacity on mass and structure during the development of arthritis, we examined DBA1/J mice for 8 weeks...
Milk is recommended as an excellent calcium source for bone health. Moreover, milk is considered to contain other components effective for bone health. In our previous studies, using an unfractionated bone cell culture system, we found that milk whey protein, especially its basic fraction (milk basic protein [MBP]), suppressed bone resorption. In this present study, we investigated whether MBP could...
Changes in cancellous bone of the rat mandibular condyle following estrogen deficiency were histomorphometrically examined with 120-day-old female Fischer rats. Sixty-four animals were either ovariectomized bilaterally (ovx) or subjected to sham surgery (sham), and eight from each group were killed at 7, 14, 30, and 60 days after surgery. Seven intact animals were killed on day 0. Before killing,...
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