In Chopart amputation, which motion is most likely preserved by rerouting the tendon to the neck of the talus?

In Chopart amputation, which motion is most likely preserved by rerouting the tendon to the neck of the talus?

• A. Dorsiflexion
• B. Plantarflexion
• C. Inversion
• D. Eversion

Answer: (A)

When a tendon is redirected to the neck of the talus in a Chopart amputation, its pull is directed in a way that creates a dorsiflexion moment at the hindfoot–midfoot complex. As the tendon contracts, it pulls the talus in a direction that raises the forefoot toward the shin, preserving the ability to dorsiflex. This specific line of pull makes dorsiflexion the motion most likely to be maintained after the procedure. Inversion, eversion, and plantarflexion would require different tendon paths and lines of pull that this routing does not provide, so they are not as reliably preserved with this repair.

When a tendon is redirected to the neck of the talus in a Chopart amputation, its pull is directed in a way that creates a dorsiflexion moment at the hindfoot–midfoot complex. As the tendon contracts, it pulls the talus in a direction that raises the forefoot toward the shin, preserving the ability to dorsiflex. This specific line of pull makes dorsiflexion the motion most likely to be maintained after the procedure. Inversion, eversion, and plantarflexion would require different tendon paths and lines of pull that this routing does not provide, so they are not as reliably preserved with this repair.