PatellaChondromalacia PatellaePatellar LigamentCartilage DiseasesPatellofemoral JointPatellar DislocationKnee JointNail-Patella SyndromeCartilage, ArticularDislocationsKnee ProsthesisArthroplasty, Replacement, KneeProchloronOsteoarthritis, KneeJoint InstabilityFemurTibiaRange of Motion, ArticularPatellofemoral Pain SyndromeArthralgiaOsteochondritisKnee InjuriesQuadriceps MuscleBone WiresKneeMolluscaJoint DiseasesAnatomic LandmarksBiomechanical PhenomenaLeadCadaverTendonsBone MalalignmentMagnetic Resonance ImagingArthroscopyBone Diseases, Developmental