Minns R J
Regional Medical Physics Department, Durham Unit, Dryburn Hospital, United Kingdom.
Arch Orthop Trauma Surg. 1989;108(1):49-52. doi: 10.1007/BF00934158.
A quasi-static analysis of axial rotation of the femoral component and the torsional forces at different angles of knee flexion was performed on knee preparations. The meniscal knee design had very much lower axial torque against axial rotation characteristics through the whole range of knee flexion than the total condylar design and could be rotated up to 59 degrees in both internal and external rotation before dislocating (i.e., a total axial rotation of 118 degrees). The sliding plateau design had torque-rotation characteristics comparable to those of the total condylar design. Torsional strain was measured on cemented and uncemented preparations, and little difference between the two was observed.
对膝关节标本进行了股骨部件轴向旋转以及不同屈膝角度下扭转力的准静态分析。在整个屈膝范围内，半月板膝关节设计相对于全髁设计而言，抵抗轴向旋转的轴向扭矩要低得多，并且在脱位前（即总轴向旋转118度），其内外旋转均可达到59度。滑动平台设计的扭矩-旋转特性与全髁设计相当。在骨水泥固定和非骨水泥固定的标本上测量了扭转应变，二者之间未观察到明显差异。
