联合数字标记示踪法和质心运算法对人体骨盆力学稳定性的分析

外科研究与新技术 ›› 2012, Vol. 1 ›› Issue (2): 108-111.

联合数字标记示踪法和质心运算法对人体骨盆力学稳定性的分析

于研, 贾永伟, 曾至立, 王建杰, 吴周睿, 吴洋春, 徐委, 胡笑, 程黎明

同济大学附属同济医院脊柱外科,上海 200065

出版日期:2012-12-28 发布日期:2012-02-25
通讯作者: 程黎明(1968-),男,教授,主任医师,博士生导师.E-mail:chlm.d@163.com
作者简介:于研(1983-), 男, 山东人, 硕士研究生

Mechanical analysis of human pelvic stability by using digital marker tracing method combined with center-of-mass algorithm method

Yu Yan, Jia Yong-Wei, Zeng Zhi-Li, Wang Jian-Jie, Wu Zhou-Rui,
Wu Yang-Chun, Xu Wei, Hu Xiao, Cheng Li-Ming

Dept.of Spine Surgery,Tongji Hospital of Tongji University,Shanghai 200065,China

Online:2012-12-28 Published:2012-02-25

摘要/Abstract

摘要： 目的分析人体骨盆力学稳定性, 为骨盆外科手术提供生物力学数据。方法选取6具尸体标本, 保留第三腰椎至股骨中上1/3段, 并固定于特制工作台上。尸体标本无结构不稳, 剥离部分软组织后保留髋臼、骨盆环周围韧带。使用白色背景下的黑色标记点来显示骨盆运动学关键点。通过材料试验机对第三腰椎上缘加载0 N~500 N的轴向载荷。使用2个电荷耦合器件(Charge Coupled Device, CCD)图像传感器分别从前方及侧方两个视角进行拍摄。基于Image J软件测算标记物的位移, 综合分析数据得出L5相对下沉位移、骨盆冠状位外展度以及矢状位旋转度。结果在500N的垂直轴向载荷下, L5相对下沉位移为1.157±0.794 mm, 骨盆冠状面外展度为0.370±0.260°和矢量面旋转度1.051±1.728°。结论联合数字标记示踪技术和质心运算法对骨盆标本进行位移测算, 分析得出人体骨盆在生理垂直载荷下表现出良好的力学稳定性。

关键词: 标记点, 示踪, 质心, Image J 软件, 骨盆, 稳定性

Abstract: Objective To analyze mechanical stability of human pelvis and to provide the pelvic surgery with biomechanical data.Methods six cadaveric specimens of the L3 to the proximal 1/3 part of femur were used and fixed on a custom experimental rig.The specimens had no structural abnormality and partial soft tissues were dissected,reserving the hip joint capsules and the ligaments of the pelvic ring.Markers with black dots against white background were used to mark the kinematic key points of the pelvis.Axial loadings from the L3 were applied by material testing machine in the gradient of 0 N to 500 N.Images of the front and lateral views were obtained using two Charge Coupled Device (CCD) cameras.Based on Image J software,relative distance of L5,the abduct degree in coronal plane and rotational degree in vertical plane were calculated by measuring the marker’s movement.Results Under a vertical loading of 500 N,the average relative distance of L5 was 1.157±0.794 mm,the average abduct degree in coronal plane was 0.370±0.260° and the average rotational degree in vertical plane was 1.051±1.728°.Conclusion Human pelvis shows optimal mechanical stability according to the displacement calculation of pelvic specimen,digital marker tracing method and the center-of-mass algorithm method are applied in combination.

Key words: Marker, Tract-Trace, Center of mass, Image J software, Pelvis, Stability

中图分类号:

R 318.01

于研, 贾永伟, 曾至立, 王建杰, 吴周睿, 吴洋春, 徐委, 胡笑, 程黎明. 联合数字标记示踪法和质心运算法对人体骨盆力学稳定性的分析[J]. 外科研究与新技术, 2012, 1(2): 108-111.

Yu Yan, Jia Yong-Wei, Zeng Zhi-Li, Wang Jian-Jie, Wu Zhou-Rui,
Wu Yang-Chun, Xu Wei, Hu Xiao, Cheng Li-Ming. Mechanical analysis of human pelvic stability by using digital marker tracing method combined with center-of-mass algorithm method[J]. 外科研究与新技术, 2012, 1(2): 108-111.