الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This study was conducted in the period between June 2016 to June 2021 involving 40 patients presented to main Menoufia University Hospital in whom half of these patients underwent primary total hip replacement for Femoral Neck Fracture (FNF) while the other half did total hip replacement for Failed Fixation of Femoral Neck Fractures (FF.FNF) with follow up period for six months. The functional outcome of total hip replacement in cases of failed fixation of femoral neck fractures (FF.FNF) in the current study is inferior to total hip replacement in femoral neck fractures (FNF) as patients who underwent total hip replacement surgery for failed fixation were less ambulant preoperatively, operative time was longer, needed more blood transfusion, longer hospital stay, later ambulation postoperatively, more postoperative early and late complications with more varus stem position and limb length discrepancy (LLD). All these preoperative, intraoperative and postoperative issues made excellent HHS (average 92.2%) was more in femoral neck fracture cases while poor HHS (average 63.3%) was more in failed fixation of femoral neck fractures.
Posterior approach was the commonest approach used in our study depending with nearly equal implantation of cemented and uncemented prosthesis in the two groups. The interval between the surgeries for fixation of femoral neck Fractures and the surgery for THA ranged from six months to 30 months with mean of 15 months. The cannulated screws were the commonest hardware in failed fixation cases (85%). Nonunion (55%) and AVN (45%) were the commonest causes for femoral neck fracture fixation failure in the current study. Total hip replacement proofed to be an optimum treatment option for elderly, active and cognitively competent patients with femoral neck fracture also total hip replacement is a good salvage treatment for cases of failed fixation of femoral neck fractures although not giving full function comparable to total hip replacement in femoral neck fractures.