MRI Quantification of the Impact of Ankle Position on Syndesmosis Anatomy
Autor: | Marie-Lyne Nault, G. Yves Laflamme, Dominique M. Rouleau, Vincent Pelsser, Jonah Hébert-Davies, Nayla Gosselin-Papadopoulos, Stéphane Leduc, Melissa Marien |
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Rok vydání: | 2016 |
Předmět: |
030222 orthopedics
Syndesmosis Rotation Tibia business.industry Normal values Anatomy Magnetic Resonance Imaging Healthy Volunteers 030218 nuclear medicine & medical imaging 03 medical and health sciences Position (obstetrics) Neutral position 0302 clinical medicine medicine.anatomical_structure Fibula Humans Medicine Orthopedics and Sports Medicine Surgery Ankle business Ankle Joint |
Zdroj: | Foot & Ankle International. 38:215-219 |
ISSN: | 1944-7876 1071-1007 |
Popis: | Background: Despite the common occurrence of syndesmotic injuries in ankle trauma, the distal tibiofibular relationship remains poorly understood. The aim of this study was to evaluate the anatomical impact of ankle sagittal positioning on the tibiofibular relationship in intact ankles by using a validated magnetic resonance imaging (MRI)–based measurement system. Methods: In this radiologic study, 34 healthy volunteers underwent a series of ankle MRIs with the ankle stabilized in 3 positions: neutral position (NP), dorsiflexion (DF), and plantarflexion (PF). Using a previously validated measurement system, 6 fixed translational measurements and 2 fixed angles were recorded on each MRI and compared using paired t tests. Results: When comparing PF to DF, the anterior distance between the tibial incisura and the fibula varied from 2.5 mm to 3.9 mm ( P < .001), respectively. The middle distance between the tibial incisura and the fibula varied from 1.5 mm to 2.6 mm ( P < .001). Fibular angle varied from 8.7 degrees to 7.8 degrees of internal rotation ( P = .046), respectively. When comparing NP to DF, only the anterior distance was found to be significantly different, varying 0.4 mm ( P < .002). Conclusions: Ankle dorsiflexion leads to an increase in external rotation and lateral translation of the fibula. These changes could be measured on MRI using a validated measurement system. Ankle motion did have an impact on the distal tibiofibular relationship and should be considered in studies pertaining to syndesmosis imaging. Clinical Relevance: This is the first in vivo study demonstrating the impact of sagittal ankle position on the distal tibiofibular relationship in an uninjured ankle. Our findings also support the practice of placing the ankle in dorsiflexion when fixing a disrupted syndesmosis. Level of Evidence: Level III, comparative study. |
Databáze: | OpenAIRE |
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