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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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Research synthesis of recommended acetabular cup orientations for total hip arthroplasty

Harrison, Claire Louise and Thomson, Avril and Cutts, S and Rowe, Philip and Riches, Philip (2014) Research synthesis of recommended acetabular cup orientations for total hip arthroplasty. Journal of Arthroplasty, 29 (2). 377–382. ISSN 1532-8406

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Total Hip Arthroplasty (THA) is regarded as one of the most successful surgical procedures of modern times yet continues to be associated with a small but significant complication rate. Many early failures may be associated with poor component positioning with, in particular, acetabular component orientation dependent on the subjective judgement of the surgeon. In this paper, we compare the manufacturers’ instructions on acetabular cup orientation with the literature-based recommended safety zones, by transforming them onto a single, clinically-relevant framework in which the different reference systems, safety guidelines and current instrumentation surgical techniques can be evaluated. The observed limited consensus between reflects ongoing uncertainty regarding the optimum acetabular component positioning that is probably responsible for a significant number of hip dislocations and early revisions. Our analysis suggests a new safety zone - the Strathclyde Safety Zone, SSZ (30° - 55° inclination and 5° - 30° anteversion) - defined in the operative reference frame, that encompasses other safety zones and which, incidentally, holds the majority of manufacturers’ guideline positions.