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Updated: Jun 27, 2026

Imaging of the Microstructural Failure Mechanism in the Human Hip

Imaging of the Microstructural Failure Mechanism in the Human Hip

Published on: September 29, 2023

Mechanical evaluation of unipolar hip spacer constructs.

Frederick J Kummer¹, Eric Strauss, Kevin Wright

¹Department of Orthopaedic Surgery, New York University/Hospital for Joint Diseases, New York, NY 10003, USA. fkummer@yahoo.com

American Journal of Orthopedics (Belle Mead, N.J.)

|December 17, 2008

Summary

The hip prosthesis construct demonstrated superior strength compared to Steinmann pins and intramedullary nails. It offers comparable strength to commercial hip spacers for limited weight-bearing applications.

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Area of Science:

Orthopedic biomechanics
Biomaterials science

Background:

Hip spacers are crucial in managing bone infections and defects.
Evaluating the mechanical integrity of different hip spacer constructs is essential for clinical success.

Purpose of the Study:

To compare the biomechanical strength of three hip spacer constructs: Steinmann pins, cement-incorporated intramedullary nail, and Charnley prosthesis.
To benchmark these constructs against a commercially available hip spacer.

Main Methods:

Mechanical testing was performed on Steinmann pins, an intramedullary nail, and a Charnley prosthesis, all incorporating cement.
The strength of these constructs was evaluated and compared to a standard commercial hip spacer.

Main Results:

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Last Updated: Jun 27, 2026

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Published on: September 29, 2023

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The hip prosthesis construct was over twice as strong as the Steinmann pin and intramedullary nail constructs.

The hip prosthesis construct exhibited strength equivalent to the commercial hip spacer.

Conclusions:

The hip prosthesis construct is a strong and potentially efficacious option for hip spacer applications, especially when limited weight-bearing is expected.
Clinical decisions should weigh the advantages and disadvantages of the hip prosthesis construct against commercially available options.