knee hip principles total hip arthroplasty total hip replacement biomechanics arthroscopy anatomy meniscus technique pathogenesis treatment insall salvati ratio blumensaats line instability patella recurrent sequence of visualization standard and accessory portals diagnostic portal collateral ligament pcl acl approach surgical gait history function sports injury corrosion fatigue composition materials implant anderson gustilo fracture open fractures gauge vac material dressing stages tuberculosis tb bpkihs perthes rajak artery upper limb
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