Generality.- Imaging knee osteoarthritis.- Osteoarthritis of the patello-femoral joint.- Acl and arthritis.- The medical treatment of gonarthrosis.- Gene therapy in tissue engineering for cartilage repair.- Surgical treatment.- Techniques in high tibial osteotomy.- Opening wedge osteotomy of the distal femur in the valgus knee.- Unicompartmental knee arthroplasty: results, causes of failure, indications.- Unicompartmental knee arthroplasty (uka) - technical principles.- Surgical indications in tibial arthrosis (tfa).- Point of view: what are the limits for acl reconstruction?- Total knee arthroplasty.- Basis.- History, evolution of concepts, various current prostheses.- Results of tka.- Causes of failure in tka.- Rehabilitation following a tka.- French anesthesia for total knee arthroplasty: medical management during the perioperative period.- Specialized aspects.- Total knee replacement in severe genu varum deformity.- Tka in valgus knee.- Total knee arthroplasty for the stiff knee.- Tka after high tibial osteotomy.- Tka after failure for unicompartmental arthroplasty.- Soft tissue balancing in tka.- Complications due to extensor apparatus in tka.- Femoral rotation in tka.- Analysis and classification of bone defect revision tka.- Revision tka for aseptic failure.- Point of view: the treatment of the bone defect in revision tka.- Choice of constraint in revision tka.- Two stage reimplantation for infected total knee arthroplasty.- Osteoarthritis of the knee - Soft tissue defect problem: prevention and traitment.- Computer assisted navigation in total knee replacement.- Controversial points.- Conservation of the pcl in tka.- Substitution of the posterior cruciate ligament in total knee arthroplasty: advantages and pitfalls.- Fixation with or without cement in tka.- The mobile plateau in tka.- Rotational positioning of the femoral component in tka.- Steps and strategy in the insertion of posterior stabilized knee replacements.