common osteotomy extended trochanteric revision thr approach fracture bicolumn acetabulum ilioinguinal stoppa acetabulum fracture pathologic fracture basic important elastic titanium nail system stable nail system prosthesis fracture peri basic pseudo arthrosis important diease paget hip shoulder examination easy campbell spondylolisthesis spine disease vic volkmaan ischaemic contracture hallux valgus basics medicin e
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