Evidence map›Paper›PMID 32451654›Full record

SynthesisInternational orthopaedics2020

Injuries of the upper cervical spine-how can instability be identified?

Shiyao Liao, Matthias K Jung, Lukas Hörnig, Paul A Grützner, Michael Kreinest

Abstract readSystematic Review
PubMed Publisher
In one paragraph

Synthesis in International orthopaedics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed.

  1. Review
  2. Article
  3. The atlantoaxial distance ratio (AADR): proposal and validation of a novel radiographic parameter for the evaluation vertical atlantoaxial dislocation in a preliminary descriptive study.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
    Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Pediatric Spine Trauma.Journal of Korean Neurosurgical Society · 2022
    Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
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

5 authors.

Shiyao LiaoDepartment of Trauma Surgery and Orthopaedics, BG Trauma Center Ludwigshafen, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen, Germany.
Matthias K JungDepartment of Trauma Surgery and Orthopaedics, BG Trauma Center Ludwigshafen, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen, Germany.
Lukas HörnigDepartment of Trauma Surgery and Orthopaedics, BG Trauma Center Ludwigshafen, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen, Germany.
Paul A GrütznerDepartment of Trauma Surgery and Orthopaedics, BG Trauma Center Ludwigshafen, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen, Germany.
Michael KreinestDepartment of Trauma Surgery and Orthopaedics, BG Trauma Center Ludwigshafen, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen, Germany. michael.kreinest@bgu-ludwigshafen.de.ORCID 0000-0002-1246-8714

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe diagnosis of instability of the injured upper cervical spine remains controversial, due to its complicated anatomical configuration and biomechanical property. Since identifying unstable injuries of the upper cervical spine is essential for immediate stabilizing therapy, this article reviews the current classification systems of upper cervical spine injuries and their statements towards instability.

methodsA systematic review of literature concerning upper cervical spine injuries was performed on the PubMed database from inception to December 2019. An English literature search was conducted using various combinations of keyword terms.

resultsNumerous separate classification systems for each specific injury of the upper cervical spine were obtained. The early classifications are based primarily on injury morphology and mechanism. The recent classifications pay more attention to the investigation of ligamentous status. Various instability criteria were established as well. The determinants involve translation, vertical distraction, angulation, rotation, obliquity of fracture line, comminution, and ligamentous disruption. The status of crucial ligaments plays a key role in determining instability of upper cervical spine injuries. CT scan is more sensitive and reliable than X-ray in detecting misalignment of the upper cervical spine.

conclusionOnly a few classification systems support decision-making concerning instability leading to early operative treatment. The ligamentous integrity is the key element of impacting the stability of the upper cervical spine injuries. The transverse ligament serves as the most crucial element in determining the stability of occipital condyle fractures and atlas fractures as well as atlanto-axial injury. The integrity of anterior longitudinal ligament, disc, and facet joint attributes to the stability of axis fractures. The integrity of tectorial membrane and alar ligaments determines the stability of atlanto-occipital dislocation. The development of a newly classification system concerning ligamentous instability with a high clinical and scientific impact is recommended.

Indexed as

Fractures, BoneJoint DislocationsSpinal InjuriesCervical VertebraeHumansLigaments, ArticularCervicalClassificationSpineStabilityUnstable

Identifiers

What OpenQuestion holds

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Registered trials

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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.