Acute traumatic subtalar dislocation: A rare but important clinical entity with 15-year retrospective radiological analysis of 23 cases.

Autor: Yung KS; Department of Radiology, Princess Margaret Hospital, Kwai Chung, Hong Kong., Kwok HM; Department of Radiology, Princess Margaret Hospital, Kwai Chung, Hong Kong., Pan NY; Department of Radiology, Princess Margaret Hospital, Kwai Chung, Hong Kong., Lo BA; Department of Radiology, Tseung Kwan O Hospital, Hang Hau, Hong Kong.
Jazyk: angličtina
Zdroj: Journal of clinical imaging science [J Clin Imaging Sci] 2024 Aug 16; Vol. 14, pp. 30. Date of Electronic Publication: 2024 Aug 16 (Print Publication: 2024).
DOI: 10.25259/JCIS_8_2024
Abstrakt: Objectives: The objectives of this study were to contribute to the limited existing knowledge about subtalar dislocations, analyze the computed tomography (CT) findings and advantages over radiography, and report the rate and potential risk factors of post-traumatic peri-talar osteoarthritis (OA).
Material and Methods: A total of 23 cases of traumatic subtalar dislocation during a 15-year period at three regional hospitals were retrospectively reviewed.
Results: All 23 cases were closed dislocations. Successful close reduction was performed in 17 patients (73.9%) and 6 patients (26.1%) required open reduction and internal fixation. Twenty patients (87%) had associated foot and ankle fractures. Fractures of calcaneal medial tubercle were the most common (75%), followed by talar head (30%), sinus tarsi (25%), and medial malleolus (25%). The radiograph's sensitivity for identifying fractures was 48.1%. The mean follow-up period is 30 months. Symptomatic OA affected 8 patients (36.4%). No post-trauatic talar avascular necrosis was noted. Fractures were present in all of those patients with post-traumatic OA (100%). Three out of five patients who sustained high-energy mechanism injury developed radiographic OA (66.7%). Three out of six patients (50%) treated with open reduction and internal fixation also developed radiographic OA.
Conclusion: Subtalar dislocation remains a rare injury. It is strongly associated with foot and ankle fractures. Fractures of the calcaneal medial tubercle were the most common. The risk of post-traumatic symptomatic peritalar OA is high. CT is useful in detecting occult fractures and injured bony subregions. We postulated potential risk factors of post-traumatic OA (fracture, high-energy mechanism of injury, open reduction, and internal fixation); however, this requires further study.
Competing Interests: There are no conflicts of interest.
(© 2024 Published by Scientific Scholar on behalf of Journal of Clinical Imaging Science.)
Databáze: MEDLINE
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