Computer-Aided Surgery Planning for Lower Limb Osteotomy

Osteotomies around the knee address lower limb deformities that affect the leg posture and especially the knee joint. Knee arthritis is a very common age-related joint disease that can be treated with osteotomy, as an alternative to knee replacement by implants. The preoperative planning process is demanding and significantly determines the surgical out-come. The choice of the osteotomy type and the determination of parameters, like the correction angle, are crucial for long-term success. We present a software tool for preoperative 3D planning of femoral and tibial opening, closing and derotation osteotomies, thus a particularly wide range of interventions. Our tool is based on patient specific 3D bone models and allows the user to position cutting planes and to simulate cut and alignment of the bone.