The talonavicular ligament is the dorsal capsular reinforcement of the talonavicular joint, providing dorsal stability to the medial column of the midfoot alongside the spring ligament on the plantar side and the posterior tibial tendon dynamically. Isolated talonavicular ligament injury produces midfoot instability distinct from the more common spring ligament failure, and is identified on MRI as signal change at the dorsal talar neck to navicular junction.
| Origin | Dorsal aspect of the talar neck |
|---|---|
| Insertion | Dorsal surface of the navicular |
| Actions | Dorsal stabiliser of the talonavicular joint; limits excessive midfoot pronation |
|---|
The talonavicular joint is the most mobile and biomechanically critical joint of the hindfoot-midfoot complex, and its fusion in triple arthrodesis eliminates virtually all hindfoot motion. Isolated talonavicular fusion is performed for isolated talonavicular arthrosis in rheumatoid arthritis with good functional outcomes because the midfoot retains some motion through the calcaneocuboid joint.
Joint degeneration producing midfoot pain managed with taping and orthotics before talonavicular arthrodesis for end-stage disease.
