Background: At present, there is a higher complication rate after treatment of femoral neck fractures with three parallel hollow nails (PHN) in the young Pauwels type Ⅲ femoral neck fractures.For better effect,F-shape hollow nails(FHN) is used to treat femoral neck fractures.The purpose of this study is to compare the clinical efficacy of FHN and PHN and provide reference for clinical application.Methods: Thirty-eight consecutive patients admitted from January 2017 to January 2020 were selected

more »

... for the study. According to random number table method, the patients were divided into two groups:group A (FHN) and group B (PHN). The gender, age, BMI, comorbidities, time from injury to operation and other general preoperative demographics were not statistically different (P>0.05). The data of the two groups can be comparable.The occurrence of avascular osteonecrosis of the femoral head (AVN), femoral neck shortening, hollow screw withdrawal was recorded in follow-up.Then, Harris hip score (HHS), pain visual analog score (VAS) of two group were obtained at the last follow-up. Results: The mean follow-up period after surgery was 21.4±10.1 (range, 14–29) months. There were 18 cases(mean age, 47.5±9.6) in group A, 20 cases (mean age, 48.6±10.1) in group B. There was no significant difference between the two groups in AVN, femoral neck shortening (P>0.05), the two groups had statistically significant differences in screw withdrawal (F=4.416, P<0.05). There was no significant difference in HHS and VAS between the two groups at the last follow-up (P>0.05).Conclusion: Three parallel hollow nails (PHN) and F-shape hollow nails (FHN) have similar short-term effects in the young Pauwels type Ⅲ femoral neck fractures, but the nail withdrawal rate of FNH is lower.