Stulberg S David, Goyal Nitin
Northwestern Feinberg School of Medicine, Department of Orthopaedic Surgery, Chicago, Illinois; Northshore Orthopaedics, Chicago, Illinois.
Northwestern Feinberg School of Medicine, Department of Orthopaedic Surgery, Chicago, Illinois.
J Arthroplasty. 2015 Oct;30(10):1839-41. doi: 10.1016/j.arth.2015.04.033. Epub 2015 May 5.
Two goals of tibial tray placement in TKA are to maximize coverage and establish proper rotation. Our purpose was to utilize MRI information obtained as part of PSI planning to determine the impact of tibial tray design on the relationship between coverage and rotation. MR images for 100 consecutive knees were uploaded into PSI software. Preoperative planning software was used to evaluate 3 different tray designs: anatomic, symmetric, and asymmetric. Approximately equally good coverage was achieved with all three trays. However, the anatomic compared to symmetric/asymmetric trays required less malrotation (0.3° vs 3.0/2.4°; P < 0.001), with a higher proportion of cases within 5° of neutral (97% vs 73/77%; P < 0.001). In this study, the anatomic tibia optimized the relationship between coverage and rotation.
全膝关节置换术中胫骨托放置的两个目标是最大化覆盖范围并建立正确的旋转。我们的目的是利用作为术前规划影像（PSI）一部分获得的MRI信息，以确定胫骨托设计对覆盖范围和旋转之间关系的影响。连续100例膝关节的MR图像被上传到PSI软件中。使用术前规划软件评估3种不同的托设计：解剖型、对称型和不对称型。三种托均实现了大致相同的良好覆盖范围。然而，与对称/不对称托相比，解剖型托所需的旋转不良更少（0.3°对3.0/2.4°；P<0.001），中立位5°范围内的病例比例更高（97%对73/77%；P<0.001）。在本研究中，解剖型胫骨托优化了覆盖范围和旋转之间的关系。
