Osteonecrosis of Femur Head after Femur Neck Fracture with the Treatment of Internal Fixation and Sartorius Iliac Flap Transplant

Cheng Genxi

Abstract：Objective To explore factors related to occurrence of osteonecrosis of femur head after femur neck fracture with the treatment of hollow screws and sartorius iliac flap transplant.Methods A total of 113 patients of femur neck fractures treated by hollow screws and sartorius iliac flap transplant between February 2005 and January 2015 were analyzed in our hospital.Patients were divided into non-osteonecrosis of femur head group and osteonecrosis of femur head group according to the occurrence of osteonecrosis of femur head at last follow-up.According to clinical information and imaging data,we selected some factors such as gender,age,time from injury to operation,Garden type of fracture,operation time,quality of reduction,weight bearing time and removal of screws,which may affect the occurrence of osteonecrosis of femur head after operation.The selected factors were grouped and assigned.After excluding unrelated factorsby one-way chi-square test analysis,multivariable Logistic regression ereused to analyze the data.Results 113 patients were followed up for 23~105 months.A total of 23 patients had osteonecrosis of femur head occurred at last follow-up.After one-way chi-square test analysis to the above 8 factors,there was statistic significance between groups about Garden type of fracture,operation time and quality of reduction(P<0.05),and there was no statistic significance about other factors(P>0.05).Multiariable Logistic regression analysis showed,Garden type of fracture was the independent influencing factor for occurrence of osteonecrosis of femur head after femur neck fracture with the treatment of hollow screws and sartorius iliac flap transplant.Conclusion Type of fracture after injury initially affectsoccurrence of osteonecrosis of femur head after femur neck fracture with the treatment of hollow screws and sartorius iliac flap transplant.Reduction at the first time and reduced operation timecanimproving quality of reduction and reduce the rate of occurrence of osteonecrosis of femur head.