【摘要】 目的观察点式接触动力加压接骨板(PC-DCP)和动力加压钢板(DCP)内固定后皮质骨微循环形态学的变化。方法采用性成熟山羊13只,在左右侧完整胫骨中段分别用PC-DCP和DCP固定。分别于固定术后1天、2、6、12周进行活体双硫蓝染色,固定骨段钢板床和横切面观察。结果PC-DCP实验侧术后1天在螺钉孔周围和钢板点接触部位出现皮质骨缺血,2螺钉孔中间骨段未观察到明显缺血区域,于术后2周完全恢复;DCP固定侧术后1天、2、6周,板下皮质骨外层持续存在缺血现象,直至术后12周微循环才恢复。结论PC-DCP固定可明显保护局部骨微循环。更多还原

【Abstract】 Objective To compare the effects of point contact-dynamic compression plates(PCDCP) and dynamic compression plates(DCP) on bone microcirculation in intact goat tibia model.Methods Twelve adult goats were used in this experiment.The bilateral intact tibia of goat were fixed with DCP and PC-DCP respectively,regions of perfusion deficiency was observed 1 day,2,6 and 12 week after the operation by Disulphine blue staining technique.Results Regions of perfusion deficiency limited to the surrounding of the drill hole site and the points where the plate contacted with the bone following PC-DCP application on the 1st day and disappeared after 2 weeks.DCP application resulted in continuous perfusion deficiency under the plate 1d,2 and 6 weeks after the operation.Conclusion PC-DCP can avoid the vascular damage under the plate compared with the conventional plates.更多还原