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A Novel Dynamic Mechanical Testing Technique for Reverse Shoulder Replacements

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Abstract

In vitro mechanical testing of orthopedic implants provides information regarding their mechanical performance under simulated biomechanical conditions. Current in vitro component stability testing methods for reverse shoulder implants are based on anatomical shoulder designs, which do not capture the dynamic nature of these loads. With glenoid component loosening as one of the most prevalent modes of failure in reverse shoulder replacements, it is important to establish a testing protocol with a more realistic loading regime. This paper introduces a novel method of mechanically testing reverse shoulder implants, using more realistic load magnitudes and vectors, than is currently practiced. Using a custom made jig setup within an Instron mechanical testing system, it is possible to simulate the change in magnitude and direction of the joint load during arm abduction. This method is a step towards a more realistic testing protocol for measuring reverse shoulder implant stability.

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Acknowledgments

We would like to acknowledge Tornier Australia for providing implants and funding for this research.

Conflict of interest

Implants and funds for this study were supported by research funds donated by Tornier Australia.

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Authors and Affiliations

  1. Australian School of Advanced Medicine, 2 Technology Place, Macquarie University, Sydney, NSW, 2109, Australia

    Danè Dabirrahmani, Desmond Bokor & Richard Appleyard

Authors
  1. Danè Dabirrahmani
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  2. Desmond Bokor
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  3. Richard Appleyard
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Corresponding author

Correspondence to Danè Dabirrahmani.

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Associate Editor Michael R. Torry oversaw the review of this article.

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Dabirrahmani, D., Bokor, D. & Appleyard, R. A Novel Dynamic Mechanical Testing Technique for Reverse Shoulder Replacements. Ann Biomed Eng 42, 727–732 (2014). https://doi.org/10.1007/s10439-013-0942-z

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  • DOI: https://doi.org/10.1007/s10439-013-0942-z

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