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General Orthopaedics

Fracture Load for Short Versus Standard Cemented Hip Stems: An Experimental in Vitro Study

International Society for Technology in Arthroplasty (ISTA)



Abstract

Introduction:

In an attempt to reduce stress shielding in the proximal femur multiple new shorter stem design have become available. We investigated the load to fracture of a new polished tapered cemented short stem in comparison to the conventional polished tapered Exeter stem.

Method:

A total of forty-two stems, twenty-one short stems and twenty-one conventional stems both with three different offsets were cemented in a composite sawbone model and loaded to fracture.

Results:

study showed that femurs will break at a significantly lower load to failure with a shorter compared to conventional length Exeter stem.

Conclusion:

This Both standard and short stem design are safe to use as the torque to failure is 7–10 times as much as the torques seen in activities of daily living.


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