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目的 :为澄清骨折愈合微血管重建意见的分歧。方法 :实验用兔 2 4只 ,4只用于正常胫骨血管观察 ,另 2 0只制成骨折模型。术后分别按 3,8,18,2 8,4 2天处死 ,观察微血管重建。结果 :( 1)微血管数量生长可分为三个时期 :初期 (约 1周 )骨折部位无或有少量新生血管 ;中期 ( 2～ 4周 )血管形成达最高峰 ;后期 ( 5周以后 )血管数量减少并逐渐转为正常形成。 ( 2 )侧支循环的建立是多源的 ,包括从骨膜动脉到骨痂 ;从骺 -干骺动脉到髓腔 ;从皮质纵血管系统到骨痂。结论 :滋养动脉 ,骺 -干骺动脉 ,骨膜动脉在骨折愈合侧支循环重建中均有重要作用
OBJECTIVE: To disagree disagreements about the importance of fracture healing in microvascular reconstruction. METHODS: Twenty-four rabbits were used in the experiment, four were used for observation of normal tibial vessels, and the other twenty were made into fracture models. After 3, 8, 18, 28, 42 days respectively, the mice were sacrificed to observe the microvascular reconstruction. Results: (1) The number of capillaries could be divided into three stages: initial (about 1 week) no or few neovascularization at the fracture site; peak at 2 ~ 4 weeks The number decreased and gradually shifted to normal formation. (2) The establishment of collateral circulation is multi-sourced, including from the periosteal artery to the callus; from the epiphyseal-epiphyseal artery to the medullary cavity; from the cortical longitudinal vascular system to the callus. Conclusion: The nourishing artery, epiphyseal-epiphyseal artery and periosteal artery all play an important role in the reconstruction of collateral circulation in fracture healing