松质骨骨折愈合中骨小梁修复的扫描电镜观察

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目的:

研究兔股骨髁间截骨后松质骨骨折愈合中骨小梁修复方式。

方法:

采用成年新西兰兔18只,在兔股骨髁间作完全截骨后,分别采用石膏、皮质骨和松质骨螺钉固定。术后3周和6周取标本在扫描电镜下观察。

结果:

采用石膏和皮质骨螺钉固定时,其愈合方式主要通过编织骨修复骨小梁。采用松质骨螺钉固定,其愈合方式主要通过板层骨重建骨小梁。

结论:

兔股骨髁间截骨后,松质骨骨折愈合存在着直接骨形成和间接骨形成两种愈合方式。

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