생체 역학적 분석에 의한 Compression Hip Screw의 디자인 요소에 대한 평가

At present, CHS(Compression Hip Screw) is one of the best prosthesis for the intertrochanteric fracture. There is nothing to evaluate the CHS itself with the finite element analysis and mechanical tests. They have same ways of the experimental test of the ASTM standards. The purpose of this study is to evaluate the existing CHS and the new CHS which have transformational design factors with finite element analysis and mechanical tests. The mechanical tests are divided into compression tests and fatigue test for evaluating the failure load, strength and fatigue life. This finite element method is same as the experimental test of the ASTM standards. Under 300N of compression load at the lag screw head. There are less differences between Group (5H, basic type) and GroupⅡ which has 8 screw holes. However, there are lots of big differences between GroupⅠ and GroupⅢ which is reinforced about thickness of the neck range. Moreover, the comparison of GroupⅢ and GroupⅣ shows similar tendency of the comparison of Group and GroupⅡ. The GroupⅣ is reinforced the neck range from GroupⅡ. After the experimental tests and the finite element analysis, the most effective design factor of the compression hip screws is the reinforcement of the thickness, even though, there are lots of design factors. Moreover, to unite the lag screw with the plate and to analyze by static analysis, the result of this method can be used with experimental test or instead of it.