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Supination-eversion ankle fractures sustained during down-hill skiing.
Archives of Orthopaedic and Traumatic Surgery. Archiv Fur Orthopadische Und Unfall-Chirurgie
|January 1, 1985
Summary
Downhill skiers can sustain supination-eversion ankle fractures even with stiff ski boots. The study explains how calf torsion within the boot can cause these specific ankle injuries.
Area of Science:
- Orthopedics
- Sports Medicine
- Biomechanics
Background:
- Ankle fractures are common injuries in sports.
- Downhill skiing involves significant forces on the lower extremities.
- Competition ski boots are designed for maximum support and rigidity.
Observation:
- Two cases of supination-eversion grade II ankle fractures occurred in skiers wearing tightly fastened competition ski boots.
- The skiing trauma mechanism primarily involves calf torsion on the foot due to the rigid boot.
Findings:
- The study demonstrates that calf torsion within a ski boot can reproduce supination-eversion ankle fractures.
- The ankle and subtalar joints act as torsion transmitters, converting calf rotation into forces causing these fractures.
- Both supination and outward foot rotation can generate similar injurious forces on the talus and ankle mortise.
Implications:
- Understanding this mechanism can inform ski boot design and injury prevention strategies.
- Athletes and clinicians should be aware of the specific risks associated with downhill skiing.
- This research clarifies the biomechanics of ankle injuries in rigid footwear scenarios.