Osteoarthritis, KneeKnee JointOsteoarthritisKneeArthroplasty, Replacement, KneeKnee InjuriesOsteoarthritis, HipKnee ProsthesisCartilage, ArticularMenisci, TibialRange of Motion, ArticularArthralgiaTibiaPain MeasurementAnterior Cruciate LigamentPatellaPainOsteophyteOsteoarthritis, SpineWeight-BearingKnee DislocationBone MalalignmentHand JointsSynovial FluidBiomechanical PhenomenaJoint InstabilityArthroscopyMedial Collateral Ligament, KneeSynovial MembraneGaitChondrocytesSeverity of Illness IndexTreatment OutcomeQuadriceps MuscleInjections, Intra-ArticularJoint DiseasesFinger JointLigaments, ArticularSynovitisStifleArthrographyHip JointArthroplasty, Replacement, HipPosterior Cruciate LigamentJoint Deformities, AcquiredArthritis, RheumatoidHyaluronic AcidMuscle StrengthMagnetic Resonance ImagingRecovery of FunctionViscosupplementationViscosupplementsPatellofemoral JointDisease ProgressionCartilageWalkingMatrilin ProteinsAnti-Inflammatory Agents, Non-SteroidalFollow-Up Studies