CAJ | 학술논문

背景:有多种钢板治疗跟骨骨折,但究竟哪种效果更好,目前尚无定论. 目的:在跟骨骨折三维有限元模型上模拟加载3种类型的钢板,观察比较应力、应变及移位等生物力学性能. 方法:在踝关节中立位和背伸20°位建立跟骨骨折三维有限元模型,分别模拟使用跟骨Ⅰ型、Ⅱ型、Ⅲ型3种形状钢板对骨折进行固定,加载后计算内固定物自身的应力分布、骨骼的应力分布及骨折块间的移位程度. 结果与结论:①两种体位骨折模型3种固定方式下的钢板应力分布都不均匀,钢板前部应力水平均高于后部,Ⅰ型钢板的应力分布相对比较均匀.②两种体位骨折模型3种固定方式下跟骨的应力最大值均在跟骨前部,而正常跟骨最大应力值在跟结节处,Ⅰ型钢板固定跟骨骨折后骨骼的最大应力值均小于Ⅱ型、Ⅲ型钢板.③两种体位骨折模型3种固定方式下均发生了骨折块间的位移,其位移趋势是一致的.结果显示,与Ⅱ型、Ⅲ型钢板固定相比较,跟骨Ⅰ型钢板固定后所承受应力更小,且应力分布更均匀,较符合生物力学原理.
배경:유다충강판치료근골골절,단구경나충효과경호,목전상무정론. 목적:재근골골절삼유유한원모형상모의가재3충류형적강판,관찰비교응력、응변급이위등생물역학성능. 방법:재과관절중립위화배신20°위건립근골골절삼유유한원모형,분별모의사용근골Ⅰ형、Ⅱ형、Ⅲ형3충형상강판대골절진행고정,가재후계산내고정물자신적응력분포、골격적응력분포급골절괴간적이위정도. 결과여결론:①량충체위골절모형3충고정방식하적강판응력분포도불균균,강판전부응력수평균고우후부,Ⅰ형강판적응력분포상대비교균균.②량충체위골절모형3충고정방식하근골적응력최대치균재근골전부,이정상근골최대응력치재근결절처,Ⅰ형강판고정근골골절후골격적최대응력치균소우Ⅱ형、Ⅲ형강판.③량충체위골절모형3충고정방식하균발생료골절괴간적위이,기위이추세시일치적.결과현시,여Ⅱ형、Ⅲ형강판고정상비교,근골Ⅰ형강판고정후소승수응력경소,차응력분포경균균,교부합생물역학원리.
@@@@BACKGROUND:There are many types of plate can be used for the treatment of calcaneus fracture, but it is not clear which type has the best effect. @@@@OBJECTIVE:To observe and compare the biomechanical properties, such as stress, strain and displacement of three types of plate through loading them on the three-dimensional finite element model of calcaneus fracture. @@@@METHODS:The three-dimensional finite element model of calcaneus fracture was established when the ankle joint was in neutral position and back stretches 20° position, then the type Ⅰ, type Ⅱ and type Ⅲ plates were used to fix the fracture model. Through loading force on the model, the stress distribution of plates and calcaneus, and displacement between fracture gaps were calculated. @@@@RESULTS AND CONCLUSION:In the position of the neutral and back stretches 20°, the stress distribution of type Ⅰ, type Ⅱ and type Ⅲ plates was not uniform, and the stress at the front was higher than that at back. Comparatively, the stress distribution of type Ⅰ plate was more uniform than type Ⅱ plate and type Ⅲ plate. And the stress distribution of calcaneus at the front was higher than that at back, while the largest stress of the normal calcaneus was distributed on the tubercle. The maximum stress of calcaneus after fixed with type Ⅰplate was lower than that fixed with type Ⅱ and type Ⅲ plates. Displacement among fracture gaps occurred after fixed with three types of plates in two positions, and the displacement tendency was uniform. The results show that when compared with type Ⅱ and type Ⅲ plates, the stress of calcaneus after fixed with type Ⅰplate is smal er and more uniform which corresponds with the biomechanics principle.