Abstract
ABSTRACTObjective: To evaluate the frequency of deltoid ligament injury in bimalleolar supination-external rotation type fractures and whether there is a correlation between the size of the fractured medial malleolus and deltoid ligament injury. Methods: Twenty six consecutive patients underwent magnetic resonance exams after clinical and radiographic diagnosis of bimalleolar supination-external rotation type ankle fractures. Results: Thirteen patients (50%) presented deltoid ligament injury associated to bimalleolar ankle fracture. Partial injury was present in seven (26.9%) patients and total injury in six (23.1%). Regarding medial fragment size, the average was 2.88 cm in the absence of deltoid ligament injury. Partial injuries presented 1.93 cm and total 2.1 cm on average. Conclusion: Deltoid ligament injury was present in 50% of bimalleolar ankle fractures. Smaller medial malleolus fragments, especially concerning the anterior colliculus, presented greater association with partial deltoid ligament injuries. Level of Evidence IV, Cross Sectional Study.
Highlights
Ankle fractures are among the most common injuries treated by orthopedic surgeons
The authors of this study hypothesize that magnetic resonance imaging (MRI) can provide important information for identifying ligament injuries associated with bimalleolar fractures of the ankle joint such as supination-external rotation according to the Lauge-Hansen classification
It was concluded that there was no significant difference in the size of the medial malleolus fragment when there was no injury to the deltoid ligament and when a total rupture was present
Summary
Ankle fractures are among the most common injuries treated by orthopedic surgeons. Typically, ankle fractures result from low-energy rotational traumas. As numbers of traffic accidents have increased, the severity of the fractures and trauma energy have grown steadily.[1,2,3,4,5] Stability of the ankle joint is provided by the medial and lateral malleoli and their respective ligaments. Careful identification of these injuries and their treatments involve recognition of bone injuries, and identification of damage to the soft tissue and ligaments. The authors of this study hypothesize that magnetic resonance imaging (MRI) can provide important information for identifying ligament injuries associated with bimalleolar fractures of the ankle joint such as supination-external rotation according to the Lauge-Hansen classification
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