What question did this study set out to answer?

To assess and compare the biomechanical load distribution of the hip pin and femoral neck screw in a standard proximal femoral nail versus an experimentally modified slotted-hole design.

December 1, 2002Clinical Orthopaedics and Related Research

Biomechanical Evaluation of the Proximal Femoral Nail

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Authors

ISInger B. SchipperLeiden University Medical Center SBStephen BresinaKyos (Switzerland)DWD. WahlAO Foundation

Discussion

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Implication

Biomechanical evaluation reveals a slotted design markedly decreases hip pin load in proximal femoral nails, suggesting a reduced risk of hardware cutout.

Key Points

To assess and compare the biomechanical load distribution of the hip pin and femoral neck screw in a standard proximal femoral nail versus an experimentally modified slotted-hole design.
Biomechanical testing of load sharing between the hip pin and femoral neck screw in a standard proximal femoral nail construct.
Evaluation of an experimental proximal femoral nail featuring a modified slotted hole rather than a circular hole for the hip pin.
Hip pins in the standard proximal femoral nail carried 8% to 39% of the total mechanical load (mean, 21%).
Hip pins passing through the modified slot carried 2% to 8% of the total load (mean, 5%), significantly lowering bending load on the unconstrained lateral end.
The slotted configuration permitted medialization of the femur and nail despite loss of parallelism between the hip pin and femoral neck screw.

Cite This Study

Schipper et al. (2002) studied this question.

synapsesocial.com/papers/6a86ffba713eb98b40ca1ed8 https://doi.org/10.1097/00003086-200212000-00035

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December 1, 2002Clinical Orthopaedics and Related Research

Biomechanical Evaluation of the Proximal Femoral Nail

View Full Paper

Ask AI

Bookmark

Authors

ISInger B. SchipperLeiden University Medical Center SBStephen BresinaKyos (Switzerland)DWD. WahlAO Foundation

Discussion

Member takes

Implication

Biomechanical evaluation reveals a slotted design markedly decreases hip pin load in proximal femoral nails, suggesting a reduced risk of hardware cutout.

Key Points

To assess and compare the biomechanical load distribution of the hip pin and femoral neck screw in a standard proximal femoral nail versus an experimentally modified slotted-hole design.
Biomechanical testing of load sharing between the hip pin and femoral neck screw in a standard proximal femoral nail construct.
Evaluation of an experimental proximal femoral nail featuring a modified slotted hole rather than a circular hole for the hip pin.
Hip pins in the standard proximal femoral nail carried 8% to 39% of the total mechanical load (mean, 21%).
Hip pins passing through the modified slot carried 2% to 8% of the total load (mean, 5%), significantly lowering bending load on the unconstrained lateral end.
The slotted configuration permitted medialization of the femur and nail despite loss of parallelism between the hip pin and femoral neck screw.

Cite This Study

Schipper et al. (2002) studied this question.

synapsesocial.com/papers/6a86ffba713eb98b40ca1ed8 https://doi.org/10.1097/00003086-200212000-00035

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