Manzotti Alfonso, Pullen Chris, Confalonieri Norberto
I U.O. di Ortopedia e Traumatologia, Ospedale C.T.O. - I.C.P., Via S. Pertini 21, Cambiago, Milan, Italy.
Chir Organi Mov. 2008 Jan;91(1):7-11. doi: 10.1007/s12306-007-0002-7. Epub 2008 Feb 10.
In total knee replacement (TKR), regarding tibial component positioning, almost all implants offer both an intramedullary and an extramedullary alignment guide, leaving it up to the surgeon which guide to use. However, early failure in TKR can be caused by incorrect positioning or orientation with poor limb alignment. Recently computer-based alignment systems have been developed to help the surgeon to overcome these complications. The Authors retrospectively analysed their experience using a computer-based CT-free alignment system. They assessed the radiological alignment of the tibial components in 38 computer-assisted TKR 6 months after surgery. The frontal tibial component angle (FTC) and the sagittal orientation of the tibial component (slope) were evaluated 6 months after the operation. The results were compared to those achieved with traditional alignment systems. The surgical time was statistically longer in the computer-assisted group but in this group all the tibial components were aligned within 4 degrees of all the ideal measurements in both frontal and sagittal planes.
在全膝关节置换术（TKR）中，关于胫骨假体的定位，几乎所有的植入物都提供髓内和髓外两种对线导向装置，由外科医生决定使用哪种导向装置。然而，TKR早期失败可能是由于定位或方向不正确以及肢体对线不良所致。最近，基于计算机的对线系统已经开发出来，以帮助外科医生克服这些并发症。作者回顾性分析了他们使用基于计算机的无CT对线系统的经验。他们在术后6个月评估了38例计算机辅助TKR中胫骨假体的放射学对线情况。术后6个月评估胫骨假体的额状面角度（FTC）和矢状面方向（斜率）。将结果与传统对线系统所取得的结果进行比较。计算机辅助组的手术时间在统计学上更长，但在该组中，所有胫骨假体在额状面和矢状面的所有理想测量值的4度范围内均对线良好。
