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首页> 外文会议>International Conference on Computational Science pt.4; 20040606-20040609; Krakow; PL >Biomechanics of Bone Cement Augmentation with Compression Hip Screw System for the Treatment of Intertrochanteric Fractures
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Biomechanics of Bone Cement Augmentation with Compression Hip Screw System for the Treatment of Intertrochanteric Fractures

机译：加压髋螺钉系统治疗股骨粗隆间骨折的生物力学

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摘要

Recently, cement augmentation technique was introduced to enhance screw fixation within the femoral head. This study investigates biomechanical efficacies of cement augmentation technique. Finite element models of the femur with sliding hip screw assemblies were constructed with and without bone cement augmentation. Appropriate contact conditions with varying friction coefficients were assigned to simulate the fracture planes and other interfacial regions. With cement augmentation, 80% reduction in stresses was found in the cancellous bone, suggesting reduced possibility of cancellous bone fracture and screw cut-outs. The peak von Mises stress within the cement mantle was about 1/3 of its fatigue strength, which suggested the longevity of the cement mantle and less likelihood of osteolysis due to cement debris. Micromotions at the hip screw interfaces were also dwon from 0.275mm to 0.008mm, an indication for strong fixation after the surgery.
机译：最近，引入了水泥增强技术以增强股骨头内的螺钉固定。这项研究调查了水泥增强技术的生物力学功效。带有和不带有骨水泥增强的带有滑动髋螺钉组件的股骨有限元模型。分配了具有变化的摩擦系数的适当接触条件，以模拟断裂面和其他界面区域。随着骨水泥的增加，松质骨中的应力降低了80％，这表明松质骨骨折和螺钉切开的可能性降低了。水泥地幔中的von Mises峰值应力约为其疲劳强度的1/3，这表明水泥地幔的寿命长，并且由于水泥碎屑而导致骨溶解的可能性较小。髋螺钉接口处的微动也从0.275mm降至0.008mm，这表明手术后需要牢固固定。

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