数字散斑法测量股骨干骨折内固定下的位移(英文)  

Digital speckle measurement of the displacement under internal fixation for fracture of femoral shaft

作　　者：王志华[1] 赵云伟[2] 李静华[3] 陈英杰[4] 叶宏[4] 周轶萍[5] 李仲铭[4] 

机构地区：[1]昆明医学院第二附属医院急诊科,云南省昆明市650221 [2]云南财经大学附属医院,云南省昆明市650221 [3]昆明医学院第二附属医院眼科,云南省昆明市650221 [4]昆明医学院,体解剖学系云南省昆明市650031 [5]昆明医学院,云南省天然药物药理重点实验室云南省昆明市650031

出　　处：《中国组织工程研究》2012年第22期4019-4022,共4页Chinese Journal of Tissue Engineering Research

基　　金：the Associated Project of Department of Science and Technology of Yunnan Province-Kunming Medical University,No.2007C0044R,2009CD188;the Project of the Department of Education of Yunnan Province,No.2010Y191,07Z10199~~

摘　　要：背景:既往研究多采用传感器来研究钢板内固定治疗股骨干骨折的生物力学特点,存在直接接触、精度低等缺点,将数字散斑技术应用到骨折生物力学领域中,能更精确地分析螺钉断裂的力学过程。目的:利用数字散斑法测量成人股骨加压钢板内固定后骨折端在不同拉力条件下地位移。方法:取6根成人股骨标本,制造肱骨中段骨折模型,骨折标本两端各使用5枚螺钉固定,进而使用电子万能机在200N和300N负荷下进行拉力实验,数字散斑法测量10种状态下骨折断端近侧螺钉的位移。结果与结论:300N拉力下的位移明显大于200N拉力(P<0.01),除螺钉1和10,2和9,3和8,4和7,5和6外,其余组两两比较差异有显著性意义(P<0.05),提示螺钉位移随拉力增加而增大,且骨折线附近螺钉的位移随拉力改变较大。BACKGROUND： The biomechanical features of the plate internal fixation for the fractures are commonly analyzed utilizing direct contact and low accuracy sensor. However, it has some limitations such as direct contact and low accuracy. The digital speckle method used in the biomechanics of fractures is more accurate to analyze the characteristics of the screw breakage.OBJECTIVE： To measure the displacement of screws under different tensile force conditions after the internal fixation surgery of compression plate for adult thighbone using digital speckle method. METHODS： A total of six femur samples from adults were used to prepare model of midshaft humerus fractures. Each of two ends of fractured samples was fixed with five screws, and the pull test was conducted under the load of 200 and 300 N by electronic versatile machine to measure the displacement of the screws under 10 conditions. RESULTS AND CONCLUSION： The displacement distance of the screw was significantly longer under 300 N loading force compared with 200 N （P 〈 0.01）. Except screws 1 and 10, 2 and 9, 3 and 8, 4 and 7, and 5 and 6, there were significant differences in the displacement between any two screws （P 〈 0.05）. Results showed that the displacement of the screws increased with increasing pulling force, and the displacement near the fracture line significantly changed with pulling force.

关 键 词：数字散斑 股骨干骨折 钢板内固定 生物力学 组织工程 

分 类 号：R318[医药卫生—生物医学工程]