Adult Flatfoot (Posterior Tibial Tendon Dysfunction)

The Tibialis Posterior tendon functions to support the arch of the foot and helps “lock” the heel onto the ankle bone to give power in push-off.

Dysfunction of the tendon in the form of tendonitis, partial, or complete tearing gives rise to a “flat foot” appearance, and results in an inability to stand on tiptoe or push off strongly when walking. Inflammation over the tendon may cause pain on the inside of the ankle and impingement of the heel and ankle bones may cause pain on the outside.