The Foot and Ankle Clinic

Flat Foot

Flat Foot

| What is it? | Is this condition always a bad thing? | How can I tell if my foot corrects fully? (What does it mean?) | When might there be a problem? | Are there any other variants in shape? | What makes the arch? | What can cause this condition and how? | What symptoms might I get? | What treatments are available for a painful flat foot? | What happens if I leave my condition untreated? | Tibialis posterior reconstruction | Why can't the tendon simply be repaired? | The operation - operative schematics | Operative stills - a) the calcaneal osteotomy ("heel shift") | Operative stills - b) the tibialis posterior debridement and flexor digitorum transfer | After the operation | Chance of success | The stiff (non correctable) and painful arthritic flat foot | What and why? | Are there any catches? | The operation - operative stills-triple fusion | The operation - pre and post operative appearance | After the operation 


flat medial arch
A flat medial arch

normal medial arch
A normal medial arch.

What is a flat foot ?
The most obvious deformity with a flat foot occurs on the inner side of the foot and arch.  However this side of the foot does not exist in isolation and if the arch on the inner side flattens this may result in the following:

  1. Heel moves outwards(valgus)
  2. Front part of the foot 'sqews' outwards at the midfoot
  3. The Achilles tendon may also become tight as a result of the heel position
  4. The forefoot may need to rotate inwards to balance the heel position

The correct medical term is a plano-valgus foot. 'Plano' refers to the flattened arch, valgus to the heel position away from the midline of the body.

plano-valgus foot

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