A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td align="left">Healing stage</td><td align="center">Implant</td><td align="center">UM</td><td align="center">UX</td><td align="center">UY</td><td align="center">UZ</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td align="left" rowspan="2">Soft callus</td><td align="center">PFNA-II</td><td align="center">12.7</td><td align="center">3.9</td><td align="center">12.0</td><td align="center">−5.5</td></tr><tr><td align="center">A2FN</td><td align="center">8.1</td><td align="center">3.7</td><td align="center">7.6</td><td align="center">−3.7</td></tr><tr><td align="center" colspan="6"><hr/></td></tr><tr><td align="left" rowspan="2">Hard callus</td><td align="center">PFNA-II</td><td align="center">11.3</td><td align="center">3.8</td><td align="center">10.7</td><td align="center">−4.2</td></tr><tr><td align="center">A2FN</td><td align="center">6.8</td><td align="center">3.6</td><td align="center">5.8</td><td align="center">−2.2</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

The maximum displacements of the proximal femur in two healing stages (mm).

Applied Bionics and Biomechanics

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Table 4

Table 4: A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis 