Osteoblasts of control group were flat, mitochondria became swelling and degeneration, had little rough endo-plasmic reticulum in the cytoplasm, nuclear stained deeper.

• 透射电镜观察可见对照侧成骨细胞呈扁平状，线粒体肿胀空泡变性，胞浆中粗面内质网数量少，核染色深；