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Ankle joint pressure in pes cavovarus
F Krause1, M Windolf, K Schwieger
1Department of Orthopaedic Surgery, Inselspital, Berne, Freiburgstrasse, CH-3010, Switzerland.
The Journal of Bone and Joint Surgery. British Volume
|December 7, 2007
Summary
Cavovarus foot deformity significantly increases ankle joint pressure, particularly in the anteromedial region. This finding suggests a link between cavovarus foot structure and the development of anteromedial ankle arthritis.
Area of Science:
- Orthopedics
- Biomechanics
- Podiatry
Background:
- Cavovarus foot deformity is a complex condition characterized by a high arch and medial rotation of the foot.
- Its impact on ankle joint biomechanics and the potential for developing arthrosis remains an area of investigation.
Purpose of the Study:
- To investigate the effect of simulated cavovarus foot deformity on tibiotalar pressure distribution in cadaveric specimens.
- To determine if cavovarus deformity influences the center of force migration within the ankle joint.
Main Methods:
- Simulated cavovarus foot deformity using 15- and 30-degree metallic wedges in the first tarsometatarsal joint of cadaver specimens.
- Measured static tibiotalar pressure distribution and center of force under physiological load using ankle joint sensors.
Main Results:
- Peak ankle joint pressure significantly increased with a 30-degree cavus deformity.
- The center of force migrated significantly anteriorly and medially with both 15- and 30-degree cavus deformities.
- Ligament laxity did not significantly affect peak pressure measurements.
Conclusions:
- Cavovarus foot deformity leads to increased anteromedial ankle joint pressure.
- This pressure increase may contribute to the long-term development of anteromedial ankle arthrosis, independent of lateral hindfoot instability.
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