公开(公告)号：US20180140232A1

公开(公告)日：2018-05-24

申请号：US15794754

申请日：2017-10-26

Applicant: Brainlab AG

Inventor： Oliver FLEIG ,  Christian BRACK ,  Zohar LEDER ,  Martin BAUER

IPC: A61B5/11 ,  A61B5/00 ,  A61B5/107 ,  A61B90/00 ,  A61B34/20 ,  A61B34/10

CPC classification number: A61B5/1121 ,  A61B5/1072 ,  A61B5/4585 ,  A61B34/10 ,  A61B34/20 ,  A61B90/361 ,  A61B90/39 ,  A61B2034/104 ,  A61B2034/2055 ,  A61B2090/397

Abstract: A data processing method for determining a range of motion of an artificial knee joint which connects a femur and a tibia via a medial ligament and a lateral ligament, wherein at least the femur comprises an implant which forms a medial condyle and a lateral condyle, the method comprising the steps of: acquiring the maximum lengths of the lateral ligament and the medial ligament for a particular flexion angle of the knee joint; calculating a first virtual position between the femur and the tibia in which the lateral condyle of the femoral implant touches the tibia and the medial ligament is stretched to its maximum length; calculating a maximum valgus angle of the range of motion from the first virtual position; calculating a second virtual position between the femur and the tibia in which the medial condyle of the femoral implant touches the tibia and the lateral ligament is stretched to its maximum length; and calculating a maximum varus angle of the range of motion from the second virtual position.