ArticleBMC musculoskeletal disorders2025
Mechanical study of the safe distance between humerus shaft fracture and distal locking screws in antegrade nailing.
Article in BMC musculoskeletal disorders, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundOptimal positioning of distal locking screws in intramedullary humeral nailing remains uncertain, particularly the influence of the distance between the fracture plane and the proximal distal locking screw on construct stability. This study aims to evaluate the mechanical stability of humeral nailing under different fracture-to-screw distances and numbers of distal locking screws using finite element analysis and mechanical testing on bone models.
methodsA finite element model and mechanical testing on six sawbones models were performed under traction (500 N), compression (500 N), and torsion (3 Nm). Models were tested with two osteotomy distances from the proximal distal locking screw (2 cm and 5 cm) and with either one or two distal locking screws. Axial and torsional stiffness and fracture displacement were recorded and analyzed statistically.
resultsFinite element analysis showed higher stress concentrations near the distal fracture fragment. Mechanical testing demonstrated that traction and torsional stability were significantly affected by fracture-to-screw distance (p = 0.006 and p = 0.015), while compression stability was influenced by the number of distal screws (p = 0.035).
conclusionA fracture-to-screw distance of 5 cm was associated with improved axial and torsional stability, while double distal screws enhanced compressive stiffness. These biomechanical results, although very promising, should be confirmed with clinical studies.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.