Patellar Tendon Tendons 2 Biomechanics 1 Bone 1 Cell compatibility 1 Collagen 1 Collagen fibrils 1 Decellularization 1 Extracellular matrices 1 Femur 1 Fibril structure 1 Joints (anatomy) 1 Kinematics 1 Knee extension 1 Moment arms 1 Native collagen 1 Older adults 1 Patella 1 Patellofemoral 1 Pathology 1 Physiological models 1 Scaffolds (biology) 1 Tendon grafts 1 Tibia 1 Tibiofemoral joint 1 Time-periods 1 Tissue compatibility 1 Weight bearing 1 arthroplasty 1 femur 1