Observational studyClinics in orthopedic surgery2026
Revision Hip Arthroplasty with a Single-Taper Cementless Conical Revision Stem: Clinical and Radiographic Assessment of 57 Implants.
Observational study in Clinics in orthopedic surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Background: The optimal stem design for revision hip arthroplasties is still controversial. A retrospective cohort study of revision hip arthroplasties performed using a single-taper cementless conical stem was designed, aiming to assess clinical outcomes, complications and survival rates, and radiological osseointegration, at a minimum follow-up of 2 years. Methods: A retrospective observational cohort study was conducted on 57 femoral revision arthroplasties performed between 2004 and 2018 using a cementless monoblock conical tapered stem, with a minimum 2-year follow-up. Clinical outcomes were assessed using the Harris Hip Score (HHS). Radiographic evaluations included stem alignment, bone stock remodeling across Gruen zones, and osseointegration graded using 2 systems: Global Radiographic Score (a 5-scale index combining bone quality and osseointegration) and the Engh criteria (fixation classified as bone ingrowth, stable fibrous fixation, or unstable fixation). Kaplan-Meier survival analysis was also performed. Results: At a mean follow-up of 6.0 ± 3.9 years, the mean HHS was 86.02 ± 9.73. The cumulative stem survival rate was 96.6% at 60 months and 120 months (implant survival: 96.6% and 89.7%, respectively). Bone stock improved across all Gruen zones, with significant increases in zones 1, 3, and 5. No radiolucent lines were found in 59.6% of proximal femurs and 93.0% of distal femurs. More than half of the stems (54.4%) achieved the maximum Global Radiographic Score (20 / 20), and 84.2% demonstrated bone ingrowth according to the Engh criteria. Conclusions: The single-taper conical revision stem provided good clinical outcomes and reliable survival rates (96.6%) at 6 and 10 years, with 93% of cases exhibiting very good stem stability.
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