Mahomed M N, Harrington I J, Hearn T C
Toronto East General & Orthopaedic Hospital, University of Toronto, Ontario, Canada.
J Trauma. 2000 Jan;48(1):93-100. doi: 10.1097/00005373-200001000-00016.
A new device for fixation of hip fractures the Medoff plate was biomechanically tested and compared with the Ambi plate and Gamma nail.
Six pairs of human cadaveric femurs were used. The characteristics evaluated were structural stiffness, strain distribution, and modes of failure. Results were compared with the Ambi plate and Gamma nail biomechanical studies from a previous study that used the same methods.
The Medoff plate was stiffer than the other two implants for intertrochanteric fractures, and for segmental subtrochanteric fracture. The Medoff plate was more load sharing than the other implants in these fracture configurations. The mean load to failure was lower than for the Ambi plate or the Gamma nail.
The Medoff plate is a better load-sharing device than the Ambi (DHS) or Gamma nail systems. The main concern is its structural weakness. The implant failed at loads 50% less than other devices. The greatest risk of implant failure is with unstable subtrochanteric fractures.
一种用于固定髋部骨折的新型装置——梅多夫钢板，进行了生物力学测试，并与安比钢板和伽马钉进行了比较。
使用六对人类尸体股骨。评估的特征包括结构刚度、应变分布和失效模式。将结果与先前一项采用相同方法的关于安比钢板和伽马钉的生物力学研究进行比较。
对于转子间骨折和节段性转子下骨折，梅多夫钢板比其他两种植入物更具刚性。在这些骨折构型中，梅多夫钢板比其他植入物分担更多的负荷。平均失效负荷低于安比钢板或伽马钉。
梅多夫钢板是一种比安比（动力髋螺钉）或伽马钉系统更好的负荷分担装置。主要问题是其结构弱点。该植入物在比其他装置低50%的负荷下失效。植入物失效的最大风险在于不稳定的转子下骨折。
