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Valgus stress radiography in normal ankles
J M Leith1, J P McConkey, D Li
1University of British Columbia, Vancouver.
Foot & Ankle International
|November 5, 1997
Summary
Deltoid ligament rupture is rare and often missed. New stress radiography techniques can help diagnose isolated deltoid ligament injuries by measuring talar tilt in the ankle.
Area of Science:
- Orthopedics
- Sports Medicine
- Radiology
Background:
- Deltoid ligament injuries are considered uncommon.
- Acute signs of complete deltoid ligament rupture can be subtle, leading to missed diagnoses.
- A standardized method for evaluating medial ankle ligament insufficiency is lacking.
Purpose of the Study:
- To develop a diagnostic test for suspected isolated deltoid ligament ruptures.
- To establish a baseline for normal talar tilt under valgus stress in uninjured ankles.
Main Methods:
- Valgus stress radiography and non-stressed radiography were performed on 32 subjects without prior ankle injuries.
- Radiographs were analyzed to measure talar tilt under stress.
Main Results:
- Stress radiography revealed a measurable, albeit minimal, talar tilt in previously uninjured ankles during valgus stress.
- This provides a quantitative reference for assessing medial ankle stability.
Conclusions:
- The study establishes a basis for diagnosing rare, isolated deltoid ligament ruptures.
- Valgus stress radiography can aid in identifying medial ankle ligament injuries that might otherwise be overlooked.