The traditional Thompson quadricepsplasty, which has a history of more than 50 years, is called lysis of the extensor mechanism
, but serious surgical trauma has remained.
These are bleeding, wound healing problems, thromboembolic conditions, deep joint infection, loosening, instability, limitation of movement, fractures around the prosthesis, periprostatic fractures, patellar tendon rupture, extensor mechanism
injuries, neurovascular injuries, medial collateral ligament injury, inappropriate array, hardness, patellofemoral dislocation, tibiofemoral dislocation, corrosion on the surfaces of prosthesis, osteolysis and tibial insert dislocation [28, 25, 39, 26].
Briefly, this model uses the following subject specific input variables obtained from standard biomechanical analyses (lower extremity kinematics, net knee joint moment, hamstring and gastrocnemius EMG), and magnetic resonance imaging (lever arm of the extensor mechanism
, vasti muscle physiological cross-sectional area proportions, vasti muscle fiber orientation, patellar ligament orientation, and patella flexion angle.