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Influence of geometry and extent of coating on survival of cementless distal- locking revision stems at 7 to 18 years

Journal of Arthroplasty Aug 11, 2020

Pommepuy T, Putman S, May O, et al. - In this study, the long-term clinical outcomes, complications, and survival of 2 revision stems were compared with different geometries, extents of coating, and distal-locking mechanisms. Outcomes at a minimum of 7 years following revision THA were retrospectively compared applying 2 proximally coated distal-locking stems: 98 Ultime first-generation (G1) and 116 Linea second-generation (G2) stems. Researchers evaluated ten-year Kaplan-Meier survival considering stem re-revision for any reason and for aseptic reasons. They obtained Harris Hip Score and Oxford Hip Score, and any thigh pain or complications were noted, at the final follow-up. In comparison with the first-generation stem, the second-generation stem had significantly better survival and clinical outcomes. The results of this study recognized that variations in survival and clinical outcomes could be attributed to the larger coated surface of the G2 stem and to the fact that the G1 stem was originally aimed as a temporary implant to be followed by de-escalation.

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