摘要
用带传感器的外固定架监测骨折端压力变化,比较了弹性加压外固定和一般外固定治疗兔胫骨中段横形截骨时,骨折端的愈合形式,骨痂抗扭功能恢复速率和应力遮挡保护作用出现的时间和强弱。6周时加压固定组一期愈合;骨痂抗扭强度为对照侧88.5%。非加压固定组二期愈合,骨痂抗扭强度是对照侧62.5%。12周时,去除压力组兔胫骨结构和功能均恢复正常,而持续加压组皮质骨疏松明显,强度为对照侧之73%。因此临床治疗骨折的早期,需给予压应力刺激;但应注意适时地去除压力和固定物,防止应力遮挡保护产生的副作用。
53 New Zealand white rabbitsunderwent unilateral tibiofibular oste-otomy with subsequent compressiveexternal fixation.Investigations weremade of the effects of maintaininginterfragmentary compression,the roe-ntgenology and histology of the ca-llus in different mechanical enviro-nments,the torsional properties andthe stress protection afforded by thefixator.The results show it is nece-ssary to monitor and adjust the fixa-tor in order to maintain the correctcompression.The bone will gain gre-ater strength by primary healing un-der compressive fixation,and biocom-pression is as essential as osteogenicfactors in fracture repair.At thelater stage healing with compressiveforce will delay bone remodeling andincrease osteoporosis.
出处
《中国临床解剖学杂志》
CSCD
北大核心
1990年第2期108-113,共6页
Chinese Journal of Clinical Anatomy
关键词
外固定
压力
胫骨骨折
生物力学
external fixation
compression
tibial fracture
