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Operating Mode and Surgical Procedure

For measuring the anatomical starting situation a transmitter is attached to the pelvis and a further one is attached to the femur. Further transmitters are attached to the instruments. This is important to get exact OR results.

At first the operating surgeon palpates anatomical landmarks. The situation of the pelvis and the femur is determined by palpating with an instrument. Out of that the computer calculates the anatomical axes. Thus the individual anatomy of the patient can be recorded and the basis for all further navigation steps is created. The camera is thereby tracking the position of the transmitters fixed at the bone and the hip joint.

After a skin incision the musculature is pushed to the side and the hip joint is uncovered. The femoral neck is divided and the femoral head is removed.

The original acetabulum centre is measured with an instrument and the recorded data is transferred to the OrthoPilot® navigation system.

For the implantation of the artificial acetabulum the cup bed is prepared with the help of special navigated instruments. OrthoPilot® indicates the situation of the new cup bed to the operating surgeon. Thus an optimal position and alignment, adjusted to the anatomy of the patient can be reached. The indication of the cutting depth to the bottom of the cup ensures a safe cutting and avoids a cutting through the bottom of the cup.

After creating the suitable cup bed, the implant can be used. Thereby the OrthoPilot® indicates the adjustment and positioning of the implant.

For the implantation of the hip stem with the help of navigated instruments first the marrow area of the femur has to be opened. The ideal point for the entrance of the instrument is indicated at the OrthoPilot® screen. Afterwards the stem bed is prepared. With the information indicated at the OrthoPilot® the later mobility of the artificial hip joint is being optimized, as well as leg length differences are being adjusted.

After correct preparation the prosthesis stem is inserted to the femur.

In the final step the implant position is again checked with the OrthoPilot® and the data is stored.