钢丝圈增强聚甲基丙烯酸甲酯骨水泥的疲劳性能和柄部下沉：一项初步体外研究。

Fatigue properties and stem subsidence in wire coil reinforced PMMA bone cement: a preliminary in vitro study.

作者信息

Kim J K, Park J B

机构信息

Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa, City 52242, USA.

出版信息

Biomed Mater Eng. 1996;6(6):453-62.

PMID:9138655

Abstract

The longevity of the cemented total hip joint replacement depends on the integrity of the cement fixation with respect to the interfaces of the metal stem and bone, and stress/strain transmission and its distribution. A simple stainless steel wire coil was placed around a tapered stem in a simulated cement mantle to counteract radial- and hoop-stress and dynamic compression-compression tests were performed. The results showed that the wire coil reinforced cement group had a higher fatigue (30%) and strength (35%) up to 10(5) loading cycles. The amount of stem subsidence during fatigue tests of the wire reinforced group was significantly reduced (2.5 times) compared with the control group.

摘要

骨水泥型全髋关节置换术的使用寿命取决于骨水泥固定在金属柄与骨界面处的完整性，以及应力/应变传递及其分布。在模拟骨水泥套中，将一个简单的不锈钢丝线圈缠绕在锥形柄周围，以抵消径向和环向应力，并进行动态压缩试验。结果表明，钢丝线圈增强骨水泥组在高达10⁵次加载循环时具有更高的疲劳强度（提高30%）和强度（提高35%）。与对照组相比，钢丝增强组在疲劳试验期间柄的下沉量显著减少（减少2.5倍）。