Swanson K E, Stocks G W, Warren P D, Hazel M R, Janssen H F
Texas Tech University Health Sciences Center, Lubbock 79430, USA.
Clin Orthop Relat Res. 2000 Feb(371):246-52. doi: 10.1097/00003086-200002000-00029.
The long-term outcome of total knee arthroplasty and femoral or tibial osteotomy is related to the ability of the surgeon to achieve the desired alignment based on preoperative planning. This study evaluates the effect of axial rotation on measured tibiofemoral angles and the angle formed between the anatomic and mechanical axes of the femur in lower extremities with valgus and varus deformities. A comparison study of the measured tibiofemoral angles indicated a statistically significant effect in models with severe vagus or varus deformity when rotated 10 degrees internally or externally. In the second part of the study, the measured angle between the anatomic and mechanical axes of the femur never varied by more than 1 degree, despite a 40 degrees are of rotation. The results of the study indicate the tibiofemoral angle measurements are more sensitive to axial limb rotation in lower extremities with valgus or varus deformity than are normally aligned limbs. In preoperative planning of total knee arthroplasty, the measured angle between the anatomic and mechanical axes of the femur is less effected by limb rotation, regardless of the degree of valgus or varus deformity.
全膝关节置换术以及股骨或胫骨截骨术的长期疗效与外科医生根据术前规划实现理想对线的能力相关。本研究评估了下肢存在外翻和内翻畸形时，轴向旋转对测量的胫股角以及股骨解剖轴与机械轴之间形成的角度的影响。对测量的胫股角进行的比较研究表明，在严重外翻或内翻畸形模型中，向内或向外旋转10度时具有统计学上的显著影响。在研究的第二部分，尽管旋转了40度，但测量的股骨解剖轴与机械轴之间的角度变化从未超过1度。研究结果表明，与正常对线的肢体相比，下肢存在外翻或内翻畸形时，胫股角测量对轴向肢体旋转更为敏感。在全膝关节置换术的术前规划中，无论外翻或内翻畸形程度如何，测量的股骨解剖轴与机械轴之间的角度受肢体旋转的影响较小。
