Our expert says:
Much to discuss. There is to my knowledge (I confirmed with one of my colleagues) only one procedure involving an implant where it is paced into a cavity in the foot and this increases the arch height at the expense of blocking movement in the ankle joint where the foot is rolling in. But there are considerations. Firstly why do you want to go for a surgical option first, when there may be a very simple conservative method available. Second, does he have a true flat foot (very rare) a bone coalition in the foot, or an overpronated foot.
Given that he is now having trouble with his knees and ankles I suspect that he has an overpronated foot.
The first line treatment for this type of foot is not surgery but custom made, moulded orthotic devices placed into his shoes (these are not ver the counter arch supports)
My advice is to send you to one of my colleagues (call the South African Podiatry assn 0861 100 249) please ask the SAPA secretary for a podiatrist well versed in Biomechanics and orthotics
You need to exhaust your consernative options before contemplating any ops
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