不同频率冲击波促进兔管状骨成骨的实验研究

A Experimental Pathological Study of Different Frequency Extracorporeal Shock Wave Induced Tibia Osteogenesis in Rabbits

目的:研究不同频率冲击波对兔管状骨骨膜及骨皮质的影响。方法:对正常新西兰大白兔的下肢胫骨部位应用不同频率的冲击波进行3天或7天冲击后,取材进行组织学HE染色,组织化学甲苯胺蓝染色,观察不同频率冲击波冲击对内、外骨膜和骨皮质影响的病理学过程。结果:正常胫骨经过不同频率冲击波冲击后均有外骨膜出血增厚,骨髓腔开放并纤维化,可见成骨样细胞增生;甲苯胺蓝染色未见成骨过程中有软骨形成,出现典型的骨膜成骨改变,7天组改变比3天组更明显,但是内骨膜无明显变化;较低频率的冲击波促进外骨膜增生及骨髓腔开放,纤维化的程度远较高频率冲击波明显。结论:不同频率冲击波作用于管状骨时主要是通过促进外骨膜生发层增生,骨髓腔开放,纤维化,骨皮质增厚来促进成骨,不经过软骨化骨的过程,而对内骨膜没有影响;不同频率冲击波促进成骨的能力与冲击波频率密切相关,高频冲击波不是促进成骨过程的理想手段。

Objective To investigate the osteogenesis capability of different frequency extracorporeal shock wave.Methods 39 rabbits received different frequency extracorporeal shock wave at the middle potion of tibia for 3 or 7 dayst,hese rabbits were then sac rificed and the tibia bones were collected to process for HE and toluidine blue stainingt,he pathological changes were observed under the light microscope.Results After different frequency extracorporeal shock wave treatmentt,he typical periosteal reaction were observed,external periosteum bleeded and thickened but there was no reaction at internal periosteum,marrow cavity opened and fibrosedt,he osteoblast-liking cell proliferated,however,no cartilage cells were observed;The rabbits received 7 days shock wave treatment showed more severe reaction than those for 3 days.The shock wave at lower frequency showed more severe reaction than higher frequency.Conclusion shock wave induced osteogenesis through the periosteal reaction of external periosteum;the osteogenesis capability of different frequency extracorporeal shock wave were affected by the frequency.Higher frequency of shock wave was not the ideal way to promote osteogenesis.