Evidence map›Paper›PMID 31316585›Full record

ArticleShoulder & elbow2019

The biomechanics of proximal humeral fractures: Injury mechanism and cortical morphology.

Addie Majed, Tanujan Thangarajah, Dominic Fl Southgate, Peter Reilly, Anthony Bull, Roger Emery

Abstract read
In one paragraph

Article in Shoulder & elbow, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Clinico-radiological outcomes of four-part proximal humerus fracture fixation with fibular strut graft augmentation.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2025
    Article
  6. Article
  7. Article
  8. Mechanisms of shoulder trauma: Current concepts.World journal of orthopedics · 2024
    Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Observational
  14. Article
  15. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Addie MajedDivision of Surgery and Cancer, Imperial College London, London, UK.
Tanujan ThangarajahShoulder and Elbow Service, Royal National Orthopaedic Hospital, Stanmore, UK.
Dominic Fl SouthgateDepartment of Bioengineering, Imperial College London, London, UK.
Peter ReillyDivision of Surgery and Cancer, Imperial College London, London, UK.
Anthony BullDepartment of Bioengineering, Imperial College London, London, UK.
Roger EmeryDivision of Surgery and Cancer, Imperial College London, London, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe aim of this study was to examine the effect of arm position on proximal humerus fracture configuration and to determine whether cortical thinning would predispose to fracture propagation and more complex patterns of injury.

methodsA drop test rig was designed to simulate falls onto an outstretched arm ('parachute reflex'). Thirty-one cadaveric specimens underwent computer tomography scanning and cortical thicknesses mapping. Humeri were fractured according to one of the two injury mechanisms and filmed using a high-speed camera. Anatomical descriptions of the injuries were made. Areas of thinning were measured and correlated with zones of fracture propagation.

resultsDirect impact simulation resulted in undisplaced humeral head split fractures in 53% of cases, with the remainder involving disruption to the articular margin and valgus impaction. Alternatively, the 'parachute reflex' predominantly produced shield-type injuries (38%) and displaced greater tuberosity fractures (19%). A strong correlation was demonstrated between cortical thinning and the occurrence of fracture (odds ratio = 7.766, 95% confidence interval from 4.760 to 12.669, p<0.0001).

conclusionThis study has shown that arm position during a fall influences fracture configuration of the proximal humerus. Correlating fracture pattern and mechanism of injury will allow more appropriate fracture reduction techniques to be devised.

Indexed as

biomechanical modellingfracture patternsproximal humeral fracture

Identifiers

PMID31316585
PMCPMC6620795

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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.