**5. Conclusions**

In summary, the results of this biomechanical study showed that femoral nailing with two reconstruction screws resulted in a higher load-to-failure than femoral nailing with standard screws in an osteoporotic femoral model. Clinically, it may be assumed that IM nail fixation using reconstructive screws could prevent femoral neck fractures in patients with osteoporosis.

**Author Contributions:** Conceptualization, K.-H.P. and C.-W.O.; methodology, J.-W.K. and H.-J.K.; validation, W.-K.H.; formal analysis, K.-H.P.; investigation, K.-H.P. and J.-H.L.; data curation, D.-H.K. and H.-J.K.; writing—original draft preparation, K.-H.P.; writing—review, and editing, C.-W.O. and J.-K.O.; visualization, K.-H.P.; supervision, C.-W.O. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1G1A1009982).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Source data may be shared upon reasonable request to the corresponding author.

**Conflicts of Interest:** The authors declare no conflict of interest.
