Congenital Vertical Talus Flashcards
What is the position of the hindfoot in vertical talus?
Equinus and Valgus caused by the contracture of the achilles tendon and posterolateral ankle/subtalar joint capsules.
What is the position of the midfoot in vertical talus?
Dorsiflexed and abducted relative to the hindfoot.
this is secondary to the contractures of the tibialis anterior, EDL, and EHB, Peroneus tertius, and EHL
The navicular is dorsally and laterally dislocated on the head of the talus.
What position is the navicular relative to the talus in vertical talus disorders?
The navicular is dorsally and laterally dislocated on the head of the talus resulting in the development of a hypoplastic and wedge shaped navicular.
The navicular is described as being what shape in vertical talus?
Hypoplastic and wedge shaped.
Which feature of vertical talus is absolutely essential to diagnosis?
The calcaneus needs to be in hardcore equinus.
If its not, then this may just be a positional deformity and not vertical talus.
Which X-ray image is essential for determening how rigid the vertical talus condition is?
Lateral view of the foot in forced plantarflexion.
How can one differentiate vertical talus from oblique talus or calcaneovalgus foot?
Forced plantarflexion and dorsiflexion in lateral view.
When forcefully plantarflexed, the talus should remain vertical
In dorsiflexion the calcaneus should remain in hindfoot equinus
Who described a classification for the vertical talus?
Coleman!
What is a type 1 vertical talus?
Type 1 deformity is characterized by a rigid dorsal dislocation of the TN joint.
What is a type 2 vertical talus?
Dorsal dislocation of the TN joint (like type 1) + Dislocation of the calcaneocuboid joint.
Long axis of the calcaneus is plantar to the long axis of the cuboid.
