Periprosthetic fracture torque for short versus standard cemented hip stems : an experimental in vitro study

Morishima, Takkan, Ginsel, Bastiaan L., Choy, Godwin G.H., Wilson, Lance J., Whitehouse, Sarah L., & Crawford, Ross W. (2014) Periprosthetic fracture torque for short versus standard cemented hip stems : an experimental in vitro study. The Journal of Arthroplasty, 29(5), pp. 1067-1071.

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Abstract

In an attempt to preserve proximal femoral bone stock and achieve a better fit in smaller femora, especially in the Asian population, several new shorter stem designs have become available. We investigated the torque to periprosthetic femoral fracture of the Exeter short stem compared with the conventional length Exeter stem in a Sawbone model. 42 stems; 21 shorter and 21 conventional stems both with three different offsets were cemented in a composite Sawbone model and torqued to fracture. Results showed that Sawbone femurs break at a statistically significantly lower torque to failure with a shorter compared to conventional length Exeter stem of the same offset. Both standard and short stem designs are safe to use as the torque to failure is 7-10 times that seen in activities of daily living.

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4 citations in Scopus
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6 citations in Web of Science®

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ID Code: 70606
Item Type: Journal Article
Refereed: Yes
Keywords: short femoral stem, fracture load, stress shielding, biomechanical study, total hip replacement, Exeter hip
DOI: 10.1016/j.arth.2013.10.016
ISSN: 0883-5403
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300) > Orthopaedics (110314)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in The Journal of Arthroplasty. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in The Journal of Arthroplasty, [VOL 29, ISSUE 5, (2014)] DOI: 10.1016/j.arth.2013.10.016
Deposited On: 30 Apr 2014 03:17
Last Modified: 01 Jun 2015 18:46

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