Comparison of femoral neck system and three cannulated cancellous screws in the treatment of vertical femoral neck fractures: clinical observation and finite element analysis.

"Declarations Ethics approval and consent to participateAll patients were treated with FNS or CCS voluntarily. This study was approved by the institutional review board, and all patients signed an informed consent form. Consent for publicationWritten consent for publication was obtained from all study participants. Competing interestsThe authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Competing interests The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"Funding This work was supported by the Xuzhou Special fund for promoting scientific and technological innovation (Grant No. KC22202)."