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本文就兔下齿槽神经缺损后立即与延迟神经移植修复后的神经纤维进行了扫描电镜与透射电镜观察。结果表明:术后8周,SEM观各组神经缝接处再生轴索失去束状排列而紊乱生长。术后20周,吻合处神经纤维呈波纹状或平直。TEM观;术后8周各组均见少部分髓鞘和轴突内某些区域空泡样变,微丝微管较少,线粒体模糊,以8周组最为严重。术后20周,髓鞘结构明晰,微丝微管丰富,以立即组恢复最好。并认为电镜观察神经纤维超微结构对于断定神经再生较其他方法具有更明显的客观优越性。
In this paper, we observed the nerve fibers repaired with delayed nerve graft immediately after rabbit's alveolar nerve defect by scanning electron microscopy and transmission electron microscopy. The results showed that at 8 weeks after operation, the SEM axons lost the bundle arrangement and disorderly growth in the regenerated axons. After 20 weeks, anastomotic nerve fibers were corrugated or straight. TEM. At 8 weeks after operation, a few myelin sheaths and vacuoles in some areas of axon were found in each group. Microtubules were less and the mitochondria were blurred, which was the most serious in 8 weeks group. After 20 weeks, the structure of myelin was clear, microfilaments were rich in microtubules, and immediate recovery was the best. And that electron microscopy of nerve fiber ultrastructure for the determination of nerve regeneration than other methods have more obvious objective superiority.