Marmignon C, Leimnei A, Lavallée S, Cinquin P
TIMC Laboratory, GMCAO TEAM, Grenoble, France.
Int J Med Robot. 2005 Dec;1(4):51-7. doi: 10.1002/rcs.57.
To obtain a long lifespan of knee prosthesis, it is necessary to restore the alignment of the lower limb. In some cases of severe arthrosis, the ligament envelope of the joint may be deformed, inducing an asymmetric laxity once the lower limb is realigned. Because there is not yet unanimity regarding how to optimally measure or implement soft tissue balance, we provide a means to acquire a variety of measurements. In traditional surgery, the surgeon sometimes uses a "tensor", which acts like a forceps. This system was redesigned, instrumented, actuated, and integrated into a navigation system for orthopaedic surgery. Improving the perception of the surgeon, it helps him to address the ligament balancing problem. Our first prototype has been tested on sawbones before being validated in an experiment on two cadavers. In our first attempt, the surgeon was able to assess soft tissue balance but judged the device not powerful enough, which led us to develop a new more powerful hydraulic system. In this paper, we present our approach and the first results of the new hydraulic tensor which is currently in an integration process.
为了使膝关节假体具有较长的使用寿命，恢复下肢力线是必要的。在一些严重关节炎病例中，关节的韧带包膜可能会变形，一旦下肢力线重新调整，就会导致不对称的松弛。由于在如何最佳地测量或实现软组织平衡方面尚未达成一致意见，我们提供了一种获取各种测量值的方法。在传统手术中，外科医生有时会使用一种类似镊子的“张力器”。该系统经过重新设计、配备仪器、驱动并集成到了骨科手术导航系统中。它提高了外科医生的感知能力，有助于他解决韧带平衡问题。我们的第一个原型在用于锯骨模型测试后，又在两具尸体上进行了实验验证。在我们的首次尝试中，外科医生能够评估软组织平衡，但认为该设备动力不足，这促使我们开发一种新的、更强大的液压系统。在本文中，我们介绍了我们的方法以及目前正在进行集成的新型液压张力器的初步结果。
