The effect of combined loading cycles on the wear of reverse shoulder joint replacements.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 30903864.
- Also identified by DOI 10.1016/j.jmbbm.2019.02.027.
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Abstract
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 clinically relevant activities of daily living (ADLs) as patterns of motion and loading on the wear of ultra-high molecular-weight polyethylene (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 cycles using the unique Newcastle Shoulder Wear Simulator. This resulted in a mean wear rate of 12.0 ± 3.9 mm<sup>3</sup>/million cycles for the UHMWPE components in combination with metallic glenospheres, while the average articulating UHMWPE surface roughness reduced from 692 ± 132 nm Sa to 42 ± 29 nm Sa.
Medical subject headings
- Arthroplasty, Replacement, Shoulder
- Materials Testing