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22-04-2024 | Computed Tomography | Original Article

The role of computed tomography with external rotation and dorsiflexion in decision making for acute isolated non-displaced posterior malleolar fractures Bartoníček and Rammelt type II: a prospective study

Authors: Alexandre Leme Godoy-Santos, Joao Carlos Rodrigues, Durval Barros-Santos, Cesar de Cesar Netto, Nacime Salomao Barbachan Mansur, Kepler Alencar Mendes de Carvalho, Vincenzo Giordano, Stefan Rammelt

Published in: European Journal of Orthopaedic Surgery & Traumatology

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Abstract

Purpose

Our objective was to evaluate the syndesmotic and fracture instability using conventional ankle computed tomography (CT) with stress maneuvers.

Methods

A consecutive sample of 123 individuals with an ankle sprain was assessed for eligibility. In total, 33 patients met the inclusion criteria. All patients underwent a magnetic resonance imaging (MRI) and CT scan with stress maneuvers (CTSM). The patterns of ligament tears f were classified using West Point grades I, IIA, IIB, III. Mann–Whitney test was used to test the differences in the numerical variables between injured and uninjured syndesmoses. The Spearman correlation tested the strength of the association between the tibial joint surface involved in posterior malleolus fracture and syndesmotic instability.

Results

In MRI, two patterns of syndesmotic ligament injury predominated. A completely torn anterior inferior tibiofibular (AITFL) and interosseous tibiofibular ligaments (ITFL) and a completely torn AITFL were combined with a partially torn ITFL. In the neutral phase CTSM and during the stress phase the median difference of the narrowest tibiofibular distance between injured and uninjured syndesmoses was 0.2 mm (P = 0.057) and 2.3 mm (P < 0.0001), respectively. There was no association between the percentage of involvement of the posterior tibial joint surface in the posterior malleolar fracture and syndesmotic instability as measured with CTSM.

Conclusion

The conventional computed tomography with external rotation and dorsiflexion represents a reproducible and accurate diagnostic option for detecting syndesmosis instability and fracture instability in acute isolated non-displaced posterior malleolar fractures Bartoníček and Rammelt type II.
Level of Evidence: Prospective study among consecutive patients (Diagnosis); Level of evidence, 2.
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Metadata
Title
The role of computed tomography with external rotation and dorsiflexion in decision making for acute isolated non-displaced posterior malleolar fractures Bartoníček and Rammelt type II: a prospective study
Authors
Alexandre Leme Godoy-Santos
Joao Carlos Rodrigues
Durval Barros-Santos
Cesar de Cesar Netto
Nacime Salomao Barbachan Mansur
Kepler Alencar Mendes de Carvalho
Vincenzo Giordano
Stefan Rammelt
Publication date
22-04-2024
Publisher
Springer Paris
Published in
European Journal of Orthopaedic Surgery & Traumatology
Print ISSN: 1633-8065
Electronic ISSN: 1432-1068
DOI
https://doi.org/10.1007/s00590-024-03952-4