Møller J T, Weeth R E, Keller J O, Nielsen S
Acta Orthop Scand. 1985 Apr;56(2):120-3. doi: 10.3109/17453678508994333.
The tibiofemoral articulation on horizontal and 10 degrees tilted tibial components was examined radiographically in 20 cadaver knees after lateral arthroplasty, and after cutting the anterior cruciate ligament in 10 knees with medial and 10 with lateral arthroplasty. Articulation took place more posteriorly on the horizontal components at any degree of flexion examined; a correlation was found between the operation-induced change in the inclination of the lateral tibial plateau and the point of articulation. Based on the regression equations, the expected point of articulation on an arbitrarily chosen component placement could be calculated for any degree of flexion provided the preoperative inclination was known. Cutting the anterior cruciate ligament caused articulation to move posteriorly on the tibial component at both medial and lateral arthroplasty. We concluded that it was possible to estimate the tilt of the tibial component that was required to avoid marginal articulations when the preoperative slope of the tibial plateau was known. Absence of the anterior cruciate ligament seems to contraindicate unicompartmental arthroplasty.
在20具尸体膝关节进行外侧关节置换术后，以及在10例内侧关节置换和10例外侧关节置换的膝关节中切断前交叉韧带后，对水平放置和胫骨部件倾斜10度时的胫股关节进行了影像学检查。在所检查的任何屈曲角度下，水平部件上的关节活动都更靠后；发现手术引起的外侧胫骨平台倾斜度变化与关节活动点之间存在相关性。根据回归方程，只要知道术前倾斜度，就可以为任意屈曲角度计算任意选定部件放置时的预期关节活动点。在内侧和外侧关节置换术中，切断前交叉韧带都会导致关节在胫骨部件上向后移动。我们得出结论，当已知胫骨平台的术前斜率时，有可能估计出避免边缘关节活动所需的胫骨部件倾斜度。前交叉韧带缺失似乎不适合进行单髁关节置换。
