Comparative Analysis Of The Curative Effect Of Femoral Neck System And Cannulated Screws In The Treatment Of Femoral Neck Fracture

Objective To explore the differences between FNS and Cannulated screws in the treatment of unstable Femoral neck fractures,the postoperative outcomes of patients treated with FNS and hollow screws were compared and analyzed.Methods Fifty-two patients with Pauwels Ⅲtype femoral neck fracture in our hospital from January 2020 to August 2021 were retrospectively analyzed,including 26 patients in group A（femoral neck internal fixation system）,12 males and 14 females,aged 48.58± 11.42 years,and 26 patients in group B（Cannulated screws）,10 males and 16 females.The age was 50.92±9.23 years,and the intraoperative data of patients in the two groups were recorded,including the operative time（min）,peroperative bleeding（ML）and Intraoperative fluoroscopy.Postoperative Visual Analogue Score,Harris score at the last follow-up and healing time（month）;The complications of delayed fracture union,nonunion and femoral neck shortening were recorded respectively.Whether there is a statistical comparison between the two dataResults There were no significant differences in age（48.58±11.42 years in group A and50.92±9.23 years in group B）and gender between the two groups.There was no significant difference in the operative time of internal fixation after reduction between the two groups（P≥0.05）.However,peroperative bleeding in group A（femoral neck internal fixation system）was more than that in group B（cannulated screw internal fixation system）,and the difference was statistically significant（P < 0.05）.The number of intraoperative fluoroscopy in group A（femoral neck internal fixation system）was significantly less than that in group B（hollow screw internal fixation system）with statistical significance（P < 0.05）.There were no statistically significant differences in fracture healing time（group A: 3.65±1.02 months,group B: 3.81±1.17 months）,postoperative VAS score and Harris score（P≥0.05）,but for femoral neck shortening group A（femoral neck internal fixation system）was significantly better than group B（hollow screw internal fixation system）.There was 1 patient with femoral head necrosis in both patients.Considering the short follow-up time,more patients with femoral head necrosis could not be ruled out.Conclusion Compared with cannulated screws,there was no significant difference in the operative time of internal fixation after reduction in the treatment of femoral neck fracture with femoral neck internal fixation system,but peroperative bleeding increased,which may be related to the larger postoperative internal fixation,and the number of intraoperative fluoroscopy was significantly reduced compared with cannulated screws.There were no nonunion cases and no significant difference in fracture healing time between the two groups（P≥0.05）.But internal carotid femoral shortening of the fixed system of march after femoral neck situation is better than a hollow screw,two groups of internal fixation are secure,without internal fixation loosening,short-term curative effect,but the two groups in case of patients with femoral head necrosis,illustrates two types of internal fixation were unable to 100% to avoid the incidence of femoral head necrosis,and follow-up time is shorter,There should be more cases of femoral head necrosis,so further clinical trials are needed to compare the incidence of femoral head necrosis between the two groups.