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The effect of combined loading cycles on the wear of reverse shoulder joint replacements.

Lookup NU author(s): Israel Ramirez-Martinez, Dr Simon Smith, Professor Tom Joyce



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier BV, 2019.

For re-use rights please refer to the publisher's terms and conditions.


Wear of polyethylene is a current limitation in the long-term survival of reverse shoulder arthroplasties (RSAs).The purpose of this study was to investigate, for the first time, the influence of a combination of clinicallyrelevant activities of daily living (ADLs) as patterns of motion and loading on the wear of ultra-high molecularweightpolyethylene (UHMWPE) in RSA. This physiological combined cycle, termed “repeated-motion-load”,was applied on four new samples of a commercially available reverse shoulder prosthesis for five million cyclesusing the unique Newcastle Shoulder Wear Simulator. This resulted in a mean wear rate of 12.0 ± 3.9mm3/million cycles for the UHMWPE components in combination with metallic glenospheres, while the averagearticulating UHMWPE surface roughness reduced from 692 ± 132 nm Sa to 42 ± 29 nm Sa.

Publication metadata

Author(s): Ramirez-Martinez I, Smith SL, Joyce TJ

Publication type: Article

Publication status: Published

Journal: Journal of the Mechanical Behavior of Biomedical Materials

Year: 2019

Volume: 94

Pages: 201-206

Print publication date: 01/06/2019

Online publication date: 26/02/2019

Acceptance date: 25/02/2019

Date deposited: 20/03/2019

ISSN (print): 1751-6161

ISSN (electronic): 1878-0180

Publisher: Elsevier BV




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