摘要
目的测试创伤性内踝缺损修复重建前后的生物力学变化,为临床应用提供理论依据。方法采集12只新鲜冰冻下肢足标本,解冻后模拟外科手术,人工造成内踝骨缺损,并采用腓骨头骨瓣重建内踝,分组进行生物力学测试。内踝缺损实验分组A组:内踝缺损组;B组:内踝正常对照组;C组:腓骨头骨瓣重建内踝组。结果①1000 N负荷时踝关节载荷-应变及刚度、强度变化,A组载荷-应变及刚度、强度变化均与B组相差显著(P<0.05),C组与B组无显著性差异。②1000 N负荷时接触特征测量,A组接触面积小于B组(P<0.05),A组接触压力大于B组(P<0.05)。结论内踝缺损可造成踝关节严重失稳,采用腓骨头骨瓣修复重建能恢复踝关节的稳定性,是行之有效的术式。
Objective To measure biomechanical changes of medial malleolus defect before and after Methods Twelve fresh freezing limb specimens were collected and experimentally tramatized to result in medial malleolus defect. Fibular head bone flap was applied to rebuild medial malleolus subsequently. Then the test groups were divided into three groups： the group of media malleolus defect （group A）, the group of medial malleolus normality （group B）, and the group of medial malleolus after reconstruction （group C）. Results The change of loading- strain, rigid and strength under 1000 N showed significant difference between group A and group B （P 〈 0.05）, however, no significant difference between group C and group B. The contact area of group A was respectively less than group B under 1000 N （P 〈 0.05）. At the same time the contact pressure of group A was bigger than group B （P 〈 0.05）. Conclusion The defect medial malleolus can lead to severe instability of ankle, and can recover its stability by the fibular head bone flap repairing. It is an effective operative method.
出处
《中国骨与关节损伤杂志》
2008年第10期818-821,共4页
Chinese Journal of Bone and Joint Injury
基金
南京军区"十一五"医药卫生科研基金课题(编号:06Z05)
关键词
生物力学
腓骨头骨瓣
内踝
Biomechanical measure
Fibular head bone flap
Medial malleolus
