Flatfoot Reconstruction (Posterior Tibial Tendon) Recovery
Posterior Tibial Tendon Reconstruction
What the operation does
The posterior tibial tendon runs behind the inner ankle bone and into the arch, and it is the main thing holding the arch up. When it stretches and fails, the arch collapses and the foot rolls inward. The reconstruction usually borrows a neighbouring tendon — most often the one that flexes the lesser toes — and transfers it to do the failed tendon's job, almost always alongside a bone cut that repositions the heel beneath the leg.
Why a tendon alone is not enough
This is the part that surprises people. Transferring a tendon into a foot that is still badly out of shape asks it to hold up an arch against the same forces that destroyed the original, and it stretches out in turn. So the bones are realigned at the same time — the heel shifted inward, sometimes the outer column lengthened — so the transferred tendon is working with the shape of the foot rather than against it. The bone work is what makes the tendon work last.
Why your foot changed shape in the first place
The tendon usually fails gradually rather than snapping, often over years, with aching along the inside of the ankle and a foot that flattens and turns out. People frequently describe watching the arch drop and the ankle roll in, and being told for a long time that it was just flat feet. It is a mechanical failure of one structure, and that is why it can be reconstructed.
The single-leg heel raise
The practical test of the tendon's job, and worth knowing about because it explains the timetable. Rising onto the toes of that foot alone is what the posterior tibial tendon makes possible, and it is usually the last thing to return — often not until six months or beyond, long after walking is comfortable. That gap is expected and is not a sign that the transfer has failed.
Weight through the foot
Generally off the leg for around six weeks in a cast while the bone cut heals and the tendon transfer settles, then weight built up in a boot over the following weeks. Where more extensive bone work was done, the protected period is longer. Your surgeon will be specific.
What you protect against early
Anything that pulls the transferred tendon before it has bonded to bone, which means resisted turning of the foot inward. Bending the foot up and down is usually encouraged early. That distinction is why the programme works up-and-down movement in the first weeks and does not introduce inward resistance work until around six weeks.
Retraining a tendon to do a new job
The transferred tendon spent your whole life flexing your toes and now has to hold up your arch. Learning that takes deliberate practice, not just healing, which is why the middle phase is built around inward resistance work rather than general strengthening. Progress here tends to be slower and less linear than bone healing, and it continues well past the point where everything has healed.
Living non-weight-bearing
Six weeks off the leg is the dominant fact of the early recovery, and worth planning rather than improvising. A knee scooter is usually easier than crutches. Arranging sleeping, washing and food before the operation makes it considerably more tolerable.
Numbness near the incisions
There are usually two — one along the inside of the ankle and arch, one on the outer heel where the bone was cut. Nerves cross both. Numbness on the inner arch or the outer border of the foot is common, usually improves over months, and may leave a permanent patch.
Swelling
The foot and ankle swell and stay swollen for a long time — commonly six months to a year, worse in the evening and after being on your feet. Elevation during the protected weeks genuinely affects how the later months feel.
Shoes and insoles
The shape of the foot changes, usually for the better, and shoe fit often changes with it. A supportive insole is frequently recommended long term — not because the reconstruction failed, but because supporting the arch protects the transfer for the years ahead. Most people find shoes easier afterwards than before.
Driving
For a right foot, driving generally waits until you are out of the boot, walking comfortably, and could brake hard without hesitating — commonly around three months. A left foot in an automatic is much sooner.
Returning to work
Desk-based work is often possible within a few weeks if you can get there and keep the foot elevated. Work on your feet generally waits three to four months, and heavier work longer.
How the first year usually unfolds
Two weeks of elevation and wound healing in a cast. Two to six weeks off the leg, working up-and-down ankle movement. Around six weeks weight begins in a boot and the transferred tendon starts being retrained. Three to six months brings normal shoes, walking and steadily improving arch strength. Six to twelve months is where the single-leg heel raise usually returns and endurance builds, and improvement often continues into the second year.
Staying in touch with your care team
How this goes depends on how far the deformity had progressed and on exactly which bone work was done alongside the transfer. Your surgeon knows those details. If something about your recovery is worrying you or does not match what is described here, contact your care team.
Exercises for Flatfoot Reconstruction (Posterior Tibial Tendon)
An illustrated, phase-by-phase exercise program for this procedure. View the Flatfoot Reconstruction (Posterior Tibial Tendon) exercise program.
Recovery education · Condition guides · Exercise programs
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This guide is general education and doesn't replace evaluation by a licensed provider. Recovery and treatment vary by person — follow the guidance of your own surgeon or care team.