Patellar DislocationPatellaPatellofemoral JointJoint InstabilityKnee JointBone Diseases, DevelopmentalOsteoarthritis, KneeKneeOsteotomyDislocationsPainFemurArthralgiaArthroplasty, Replacement, KneeKnee InjuriesKnee ProsthesisGenomic InstabilityPain MeasurementPain ManagementChromosomal InstabilityChronic PainRange of Motion, ArticularPain, PostoperativePain ThresholdPopliteal CystMicrosatellite InstabilityMenisci, TibialLow Back PainBack PainPain, ReferredPatellofemoral Pain SyndromeAnterior Cruciate LigamentQuadriceps MuscleArthroscopyTibiaNeck PainAbdominal PainPain, IntractableBiomechanical PhenomenaCartilage, ArticularOsteoarthritisMusculoskeletal PainWeight-BearingTreatment OutcomeSeverity of Illness IndexPain PerceptionCartilage DiseasesPelvic PainJoint DiseasesFacial PainPatellar LigamentAcute PainKnee DislocationMagnetic Resonance ImagingPosterior Cruciate LigamentDisability EvaluationBursitisGaitLigaments, ArticularFollow-Up StudiesProspective StudiesBone MalalignmentMicrosatellite RepeatsRecovery of FunctionAnalgesicsChronic DiseaseShoulder PainOsteochondrosisMedial Collateral Ligament, KneeSynovitisOsteophyteQuestionnairesWalkingExercise TherapyMuscle StrengthArthrometry, ArticularBone Marrow DiseasesArthrographyPhysical Therapy ModalitiesTime FactorsAnalgesics, Non-NarcoticBracesAthletic InjuriesAcupuncture AnalgesiaIbuprofenAnkle JointProsthesis DesignPrevalenceAnti-Inflammatory Agents, Non-SteroidalOrthopedic ProceduresHipReoperationRisk FactorsDisease ProgressionTendinopathyProprioceptionReproducibility of ResultsCohort StudiesMovementPostural Balance