CAJ | 학술논문

背景：目前，关于肱骨及接骨板的生物力学研究较多，但甚少将两者组合为一个骨折固定模型并将材料及预紧力作为参数进行研究。 　　目的：通过带接骨板的肱骨骨折有限元模型的生物力学仿真，比较不同接骨板和螺钉材料、预紧力对举重过程中接骨板及螺钉失效可能性的影响，以及对骨折应力遮挡效率的影响。 　　方法：利用肱骨点云数据和接骨板及螺钉几何数据进行装配，得到带接骨板的肱骨骨折有限元模型，将举重动作逆向动力学仿真得到的关节力和肌肉力作为有限元仿真的载荷边界条件。采用相同的有限元模型进行参数化研究，比较不同接骨板和螺钉材料及预紧力对接骨板、螺钉、骨折缝及其周围肱骨应力变化的影响。 　　结果：相同预紧力下，采用不锈钢材料接骨板和螺钉的应力大于钛合金和钛材料，即采用不锈钢材料接骨板和螺钉失效的危险性大于钛合金和钛材料；采用不锈钢材料时肱骨的应力遮挡率大于钛合金和钛材料；采用相同材料时，增加预紧力会导致接骨板和螺钉的应力增加，但会减小肱骨的应力遮挡率。 　　结论：接骨板和螺钉的材料属性及预紧力大小等因素均对接骨板、螺钉以及骨的应力分布有一定影响。本文建立的分析方法同样适用于其它部位骨折固定的应力分析。
배경：목전，관우굉골급접골판적생물역학연구교다，단심소장량자조합위일개골절고정모형병장재료급예긴력작위삼수진행연구。 　　목적：통과대접골판적굉골골절유한원모형적생물역학방진，비교불동접골판화라정재료、예긴력대거중과정중접골판급라정실효가능성적영향，이급대골절응력차당효솔적영향。 　　방법：이용굉골점운수거화접골판급라정궤하수거진행장배，득도대접골판적굉골골절유한원모형，장거중동작역향동역학방진득도적관절력화기육력작위유한원방진적재하변계조건。채용상동적유한원모형진행삼수화연구，비교불동접골판화라정재료급예긴력대접골판、라정、골절봉급기주위굉골응력변화적영향。 　　결과：상동예긴력하，채용불수강재료접골판화라정적응력대우태합금화태재료，즉채용불수강재료접골판화라정실효적위험성대우태합금화태재료；채용불수강재료시굉골적응력차당솔대우태합금화태재료；채용상동재료시，증가예긴력회도치접골판화라정적응력증가，단회감소굉골적응력차당솔。 　　결론：접골판화라정적재료속성급예긴력대소등인소균대접골판、라정이급골적응력분포유일정영향。본문건립적분석방법동양괄용우기타부위골절고정적응력분석。
Background:Now there are many biomechanical researches on humerus or humeral bone plate. However, there are few re-ports on humerus bone-plate system using material properties and pre-tightening force as parameters. Objective: To evaluate the effect of bone plate material and pre-tightening force on stress distributing of bone and plate through biomechanical simulation of the finite element model of fracture humerus bone with plate. Methods:The finite element model of humerus fracture was set up by using point cloud data of humerus and geometry data of bone plate and screw. The joint force and muscle force deriving from inverse dynamics analysis of weight lifting activity were taken as boundary conditions. On the finite element model, the stress distribution changes of bone plate, bone screw, fracture seam and humerus were compared between different materials and pre-tightening forces. Results:Under the same pre-tightening force, the stress of stainless steel was larger than Ti alloy and Titanium. The stess-shielding of stainless steel was larger than Ti alloy and Titanium. When the same material was applied, increased pre-tight-ening force could induce the increase of stress of bone plate and screw and decrease of stess-shielding. Conclusions: The material and pre-tightening force of bone plate and screw will affect on the stress distribution of bone plate, bone screw and bone itself. This method can be used for stress analysis of other bone fractures.