Mackechnie-Jarvis A C
J R Soc Med. 1983 Aug;76(8):643-8. doi: 10.1177/014107688307600805.
Artificial cadaveric femoral neck fractures were internally fixed with five different devices and subjected to cyclical loading of 0-1.0 kilonewtons (approximately one body weight) whilst in an anatomical position. Displacement of the proximal fragment was detected by a transducer and charted. Bone strength was assessed by a preliminary control loading phase on the intact bone. Efficiency of each fracture fixator could then be directly compared by the relative movement in each case. Five specimens each were tested with Moore's Pins, Trifin Nail, Garden Screws and a sliding screw-plate (OEC Ltd). By the criteria of the experiment, which put a severe shearing load on the implant, none of these devices reliably bore the representative body weight. An extended barrel-plate, which supported the sliding screw almost up to the fracture line, was then made. This device, employing some of Charnley's concepts, tolerated body weight in four cases out of five.
人工尸体股骨颈骨折采用五种不同的器械进行内固定，并在解剖位置上承受0至1.0千牛顿（约一个体重）的周期性负荷。近端骨折块的移位通过传感器检测并记录。通过对完整骨骼进行初步的对照加载阶段来评估骨强度。然后，通过每种情况下的相对移动，可以直接比较每种骨折固定器的效率。分别用摩尔针、三翼钉、加登螺钉和滑动钢板（OEC有限公司）对五个标本进行测试。根据该实验对植入物施加严重剪切负荷的标准，这些器械均不能可靠地承受相当于体重的负荷。随后制作了一种加长的钢板，该钢板几乎将滑动螺钉支撑到骨折线处。这种采用了查恩利一些理念的器械，在五个病例中有四个能够承受体重。
