Direct anterior approach Total hip arthroplasty Open-wedge high tibial osteotomy Arthritis Arthroplasty Computed tomography Coronal alignment Dislocation Fluoroscopy Hip Hip architecture Implant design Joint line convergence angle Learning curve Medial proximal tibial angle Pelvis and acetabulum Periprosthetic femoral fracture Pre-operative planning Regionale Kooperation Templating Total knee arthroplasty Vancouver classification Wirtschaftskooperation Anterior approach Apoptosis Arbeitnehmer Außenhandel Baba classification Bowing Branche