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Financial support: This study was supported with grants from ZimmerBiomet Korea and by the Academic Research Foundation of Jeju National University Institute of Medical Science. Conflict of interests: None. Purpose: The aim of this study is to investigate the clinical performance and safety of Zimmer natural nail cephalomedullary nail (ZNN CM nail) in the treatment of proximal femur fractures. Materials and Methods: The following research was conducted as a prospective, non-comparative, single center outcome study. Upon providing written informed consent, enrolled patients’ data were collected and analyzed. Postoperative follow-up visits were scheduled at 6 weeks, 3 months, 6 months, and 1 year. Follow-up evaluation included radiographic assessment, physical examination, and quality of life and adverse events reports. Results: Thirty-nine patients were available for evaluation at one year postoperative. The patients reported the mean EuroQol-5 Dimension score increased after surgery: from 0.4 points at discharge (n=49) to 0.6 points at 1-year post-surgery (n=39). The mean Harris hip score also increased after surgery: from 56.3 points at discharge (n=49) to 72.1 points at 1 year (n=12). Bone union was seen in 64% (n=16) in 6 months and 95% (n=37) in 1 year. Conclusion: The results of this 1-year follow-up study affirmed the effectiveness and safety of the ZNN CM nail in the treatment of proximal femur fractures.

Treatment of the Proximal Femoral Fracture Using the New Design Cephalomedullary Nail: Prospective Outcomes Study