ArticleCureus2026
Bone Union and Safety of the Long Chimaera Nail in Extracapsular Femoral Fractures: A Retrospective Multicenter Study.
Article in Cureus, 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundProximal femoral fractures (PFFs) are a major source of morbidity and mortality in the elderly. Although cephalomedullary nailing (CMN) systems are widely used for the treatment of extracapsular/trochanteric PFFs, the optimal implant choice remains debated - in particular, in the case of stable trochanteric fracture patterns. Chimaera
methodsThe study cohort included 44 patients (mean age: 74.0 ± 14.5 years; 68.2% female), whose clinical data were assessed to evaluate bone union within 12 months, as well as adverse events and complications.
resultsAmong patients included for union assessment evaluation (n=42), eventual union was clinically documented in all cases (100%; 95% CI: 91.6-100%); in line with the retrospective design and a variable imaging availability, this estimate refers to evaluable patients only, with X-ray documented union in 29 patients. Overall, 38.1% of evaluable patients had clinically documented union at first follow-up (1.3 months) and a median time to documented union of 7.4 months. Four adverse events (9.1%) and two reoperations (4.5%) were observed, none related to the device. No implant-related fractures or screw cutouts were reported, and no deaths were recorded. Mean operative time was 91.3 ± 45.7 minutes, and mean tip-apex distance (TAD) decreased from 27.2 mm postoperatively to 24.7 mm at late follow-up.
conclusionsDespite inherent limitations due to the retrospective design and the lack of a control group, results confirm the favorable benefit-risk profile of the Chimaera
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