Mellor S J, Ripley L G, Ricketts D M
Department of Orthopaedic Surgery, Austin and Repatriation Medical Centre, Heidelberg, Melbourne, Victoria, Australia.
Int Orthop. 2004 Feb;28(1):40-3. doi: 10.1007/s00264-003-0509-y. Epub 2003 Oct 8.
We measured the size and volume of the femoral broaches and stems supplied with three commercial total hip replacement (THR) systems (JRI Furlong, Biomet Stanmore, and Howmedica Exeter). Using an in vitro method, we created cement mantles that could be directly measured. The broaches supplied with the Biomet Stanmore and the Howmedica Exeter systems allowed the creation of significantly thicker cement mantles than the JRI broaches and stems (Stanmore mean thickness = 1.7 mm, defects at 3% of measurement sites; Exeter mean thickness = 2.0 mm, no defects; JRI mantles mean thickness = 0.9 mm, cement defects at 29% of measurement sites). We conclude that, in vivo, the broaches supplied with the Stanmore and Exeter systems are significantly larger than the corresponding stems, and will excavate a cavity large enough to accommodate the appropriate femoral stem surrounded by an intact cement mantle.
我们测量了三种商用全髋关节置换（THR）系统（JRI Furlong、Biomet Stanmore和Howmedica Exeter）所配备的股骨拉刀和柄的尺寸及体积。采用体外方法，我们制作了可直接测量的骨水泥套。Biomet Stanmore系统和Howmedica Exeter系统所配备的拉刀能制作出比JRI拉刀和柄厚得多的骨水泥套（Stanmore平均厚度 = 1.7毫米，测量部位有3%存在缺陷；Exeter平均厚度 = 2.0毫米，无缺陷；JRI骨水泥套平均厚度 = 0.9毫米，测量部位有29%存在骨水泥缺陷）。我们得出结论，在体内，Stanmore系统和Exeter系统所配备的拉刀明显大于相应的柄，并且会挖出一个足够大的腔，以容纳被完整骨水泥套包裹的合适股骨柄。
