利用数字散斑法测量股骨干骨折加压钢板内固定下的位移和形变  

Measuring the displacement and deformation under the internal fixation with compressing steel plate for femoral fractures by digital speckle method

作　　者：邹庆峰[1] 陈元晓[2] 李建云[3] 吴加权[4] 马琨[4] 陈英杰[1] 

机构地区：[1]昆明医学院人体解剖学教研室,昆明650031 [2]昆明医学院生物学教研室,昆明650031 [3]昆明理工大学力学系,昆明650101 [4]昆明理工大学物理系,昆明650101

出　　处：《解剖学报》2010年第1期157-159,共3页Acta Anatomica Sinica

基　　金：云南省科技厅-昆明医学院联合专项基金资助项目(2007C0043R);云南省教育厅科学研究基金立项资助项目(07Z10199)

摘　　要：目的利用数字散斑法测试成人股骨加压钢板内固定术中骨折断端第5颗螺钉在不同拉力条件下的位移和形变情况,分析减少加压钢板螺钉数量是否影响骨折断端螺钉的位移和形变,旨在为临床成人股骨加压钢板内固定术中加压螺钉数量的确定提供理论依据。方法取成人防腐股骨标本,剔除软组织后用牙托粉包埋固定,制作股骨中1/2内固定模型。加压钢板置入股骨后外侧骨膜下,骨折端两侧各5枚螺钉穿透4层骨皮质。标本分10个状态,按A～J组测量顺序进行测量。在400、500N拉力下,用CSS-44100型电子万能实验机进行加载拉力测量骨折断端第5颗螺钉的位移和形变,计算机自动处理数据。结果方差分析,在400N、500N拉力下第5颗螺钉的位移测量均值,B～J组与A组比较差异有显著性(P<0.05);在400N、500N拉力下第5颗螺钉的形变测量均值,A组与F～J组比较差异有显著性(P<0.05),A组与B～E组比较无显著性差异(P>0.05)。结论骨折断端第5颗螺钉位移大小与加压钢板上螺钉数量呈负相关。靠近骨折线的螺钉承受较大的应力,容易断裂。Objective Measuring the displacement and deformation of the fifth screw under different tensile force before or after aduhal internal fixation with compressing steel plate for femoral fractuer by digital speckle correlation method. And analysis of the displacement and deformation after reducing the number of screws. Aimed at providing a theoretical basis for clinical femoral internal fixation with compressing steel plate about the number of screws. Methods Taking the antisepsis femoral specimen of grown-ups, embedding and fixing with tooth powder after removing the soft tissue, producing a fixed model in the 1/2 femur. Fixing steel plate below the lateral femur subperiosteal with five screws through the fourth floor of cortical bone on both sides of the fractures, samples were divided into 10 states, group A-J were measured by orders, under the rally of 400 N,500N , measuring the displayment of the fifth screw with CSS-44100-e- universal test machine for loading rally experiment ,and automatic data processing. Results For analysis of variance, the mean displacement measurements of the fifth screw under rally of 400N,500N, B-J group and A group have significant differences（P 〈 0.05 ）. The mean deformation measurements of the fifth screw under rally of 400N,500N, group A and group F-J group have significant differences （P 〈 0. 05 ）; group A and B-E group have no significant differences. Conclusion In a certain range, the fracture displacement and the numuber of the screws show negative correlation. The screws near the fracture line for femoral compression plate internal fixation of femoral fractuer is easily broken because of the too large deformation.

关 键 词：股骨干 骨折 钢板内固定 生物力学 人 

分 类 号：R322.33[医药卫生—人体解剖和组织胚胎学]