To reduce postoperative complications, researchers have been committed to innovation of internal fixation methods and devices. Different studies have reported that 7–22% of patients receive secondary operations, mostly due to complications, such as avascular necrosis of the femoral head (ANFH), nonunion, severe femoral neck shortening (SFNS), and screw-out. However,failure of internal fixation and functional loss after surgery are not uncommon and often lead to rehospitalization or even more serious consequences. Various approaches to internal fixation such as cannulated compression screws (CCSs), sliding hip screws, Hansson pin system and dynamic hip screws (DHSs) have been used for the treatment of FNFs. Registered on 21 September, 2021.Īs the population ages, femoral neck fractures (FNFs) are becoming a common injury in middle-aged and elderly people, accounting for approximately 54% of hip fractures. Trial registrationĬhiCTR, ChiCTR2100051360. Moreover, our study demonstrated that age and Garden classification were not significant risk factors at multivariate analysis. In this study, sex, BMI, injury side, injury mechanism, reduction method, Pauwels angle, femoral neck-shift angle, Pauwels classification and Garden classification were excluded as EFFNS risk factors. Moreover, we not found that Garden classification ( P = 0.464) and age ( P = 0.128) were statistically significant risk factors for EFFNS at multivariate analysis. In the failure group, all patients were younger than 65 years old, which was significantly higher than 59.6% in the healing group ( P = 0.012). Out of the 62 FNFs patients, 10 patients (16.1%) developed EFFNS, including 6 cases of severe femoral neck shortening, 2 cases of screw-out, 1 case of avascular necrosis of the femoral head and 1 case of nonunion. Multifactor logistic regression analysis was used to analyse the different influencing factors. Demographic data, clinical characteristics, radiographic features and treatment process were described. We retrospectively analysed 62 patients with FNFs and underwent FNS fixation between 20. Femoral neck system (FNS) is a new type of internal fixation system which has been widely used for treating femoral neck fractures (FNFs).Compared with other internal fixation methods, FNS is minimally invasive and stable, and often achieves satisfactory short-term efficacy.Early failure of FNS (EFFNS) is not uncommon, however, there are few literatures and reports on factors associated with EFFNS.This study aimed to survey the prevalence and risk factors of EFFNS.
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