Methods: the osteoblast-like cell MG-63 were stimulated with different amplitude by four-point-bend loading device, and the different proliferative index after tension-stress load were studied.
方法：采用四点弯曲细胞力学加载仪对成骨样细胞MG- 6 3分别以不同强度的张应力进行力学刺激，并对其受力后的增殖状态进行了研究。
At the distal part of femur in fetus age of 30 weeks, a cluster of lump-like osteogenic cell, osteoblast and basophlous osteoid filled among cells appeared at the secondary ossification center.
胎龄30周的股骨远端，骨化中心呈现团块状成群的骨原细胞和成骨细胞，嗜碱性的类骨质填充于细胞间；
At the distal part of femur in fetus age of 30 weeks, a cluster of lump-like osteogenic cell, osteoblast and basophlous osteoid filled among cells appeared at the secondary ossification center.
胎龄30周的股骨远端，骨化中心呈现团块状成群的骨原细胞和成骨细胞，嗜碱性的类骨质填充于细胞间；
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