What is it about?
Infection, aseptic loosening, periprosthetic fractures and dislocations are the leading causes of hip revision. Current revision stem designs feature a tapered body with circumferential placed longitudinal thin metal splines that cut into the femoral cortex of the diaphysis to provide axial and rotational stability. We investigated the influence of design changes regarding these splines on the torsional stability by comparing two stem designs with differing geometries.
Photo by National Cancer Institute on Unsplash
Why is it important?
Our findings show that a second set of splines with reduced prominence could improve primary stability of a revision stem in the femoral diaphysis in the presence of significant proximal bone loss. The beneficial effect of varying spline size and number has the potential to further improve the longevity of revision hip stems.
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This page is a summary of: The influence of hip revision stem spline design on the torsional stability in the presence of major proximal bone defects, PLoS ONE, September 2023, PLOS,
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