CAJ | 학술논문

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.
목적 이용수자산반법측시성인고골가압강판내고정술중골절단단제5과라정재불동랍력조건하적위이화형변정황,분석감소가압강판라정수량시부영향골절단단라정적위이화형변,지재위림상성인고골가압강판내고정술중가압라정수량적학정제공이론의거.방법 취성인방부고골표본,척제연조직후용아탁분포매고정,제작고골중1/2내고정모형.가압강판치입고골후외측골막하, 골절단량측각5매라정천투4층골피질.표본분10개상태,안A～J조측량순서진행측량.재400、500N랍력하,용CSS-44100형전자만능실험궤진행가재랍력측량골절단단제5과라정적위이화형변,계산궤자동처리수거.결과 방차분석,재400N、500N랍력하제5과라정적위이측량균치,B～J조여A조비교차이유현저성(P<0.05);재400N、500N랍력하제5과라정적형변측량균치,A조여F～J조비교차이유현저성(P<0.05),A조여B～E조비교무현저성차이(P＞0.05).결론 골절단단제5과라정위이대소여가압강판상라정수량정부상관.고근골절선적라정승수교대적응력,용역단렬.
Objective Measuring the displacement and deformation of the fifth screw under different tensile force before or after adultal 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.