髁突骨上组织扫描电镜和透射电镜的比较研究

目的比较髁突骨上组织在扫描电镜（ＳＥＭ）和透射电镜（ＴＥＭ）下的不同表现特点。方法３只成年健康家兔左侧髁突断裂后用ＳＥＭ的方法观察断面的结构，右侧做常规ＴＥＭ检查。结果ＳＥＭ发现，髁突软骨细胞仪表面呈蜂窝样的球体，胞内有多个空泡存在：钙化的软骨细胞这种表面形态消失，不规则地皱缩。ＴＥＭ下，软骨细胞似透明软骨细胞的典型形态，有短小突起，周围有半透明的薄带。钙化的软骨细胞内细胞器明显减少，部分有坏死的表现。结论ＳＥＭ观察到的髁突软骨细胞表面特征可反映细胞内部的结构和变化。

A comparative study of the supraosseous tissue of mandibular condyle by scanning electron microscopy and transmission electron microscopy

Objective: To compare the different ultrastructure of the supraosseous tissues of mandibular condyle by scanning electron microscopy (SEM) and transmission electron microscopu(TEM). Methods: Left mandibular condyles of 3 adult health Chinese rabbits were detected by SEM using a brooken-tech nique and the right condyles were observed by TEM. Results: The appearance of chondrocyte on SEM was just like honeycomb and there were some vacuolates in the cytoplasm. The calcified chondrocyte had no such appearance but showed irregularly contraction and shrinkage. On TEM, chondrocyte was surrounded by a thin pericellular zone similar to the typical chondrocyte in hyaline cartilage, containing short cellular processes. Calcified chondrocyte had-few organelles and some were almost necrotic. Conclusion The appearanece of chondrocyte on SEMinight reflect the inside construction and changes of cell itself.