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Purpose of a Navigated Knee Surgery

An important condition for a good result of joint replacement is the correct geometrical adjustment of the implant components compared to the mechanical leg axis.

This goes directly through the centre of the femoral head, the knee joint and the ankle joint. If the knee center is not lying on this axis, it is called knock knee (valgus) and/or bow leg (varus). For the avoidance of such deviations and the associated increased abrasion of the prosthesis, it is important to use the implants rectangular to the mechanical axis.

In order to assure a good function of the artificial joint, it is necessary to grant a constant ligament tension at the knee.
With the help of the navigated knee surgery it is therefore possible to simulate the ligament tension before the implantation of the prosthesis with an interactive planning tool. Thus a better load distribution on the implant, as well as a better joint function as OR result is guaranteed. Thereby the OrthoPilot® supplies important information regarding the axis deviation and the range of motion of the joint and supports the operating surgeon in respect to correct adjustment of the implant components. The purpose is an ideal stability with the highest possible mobility of the new joint.

Compared to many other systems the OrthoPilot® navigation system is abandoned from additional image-guided preliminary analysis of the patient. Therefore there are no exposure doses by CT-scans.

The substantial advantage with the insertion of the OrthoPilot® is the accuracy during the adjustment of the implant – the condition for a long durability of the artificial knee joint and a good joint function.