Will I walk normally after a big toe fusion?
Yes, and for most people more comfortably than before. Fusing the big toe joint sounds like a drastic thing to do to a joint you push off from with every step, and "I won't be able to walk properly" is the fear that keeps people limping on a worn-out toe for years. What the joint does in ordinary walking, and what a fusion does to it, are worth understanding before you decide.
What the big toe joint does when you walk
The joint at the base of the big toe bends upwards as the heel lifts and the body rolls forward over the front of the foot. A healthy joint can bend around sixty degrees; ordinary walking uses a good deal less than that, and only for the last part of each step. Walking is mostly the hip, the knee and the ankle. The toe joint finishes the step rather than driving it, which is why an arthritic joint that is forced to bend hurts with every step, and a fused one set in the right position does not.
Why a fused toe still pushes off
In a fusion the worn cartilage is removed and the two bones are fixed together with a plate and screws, with the toe set slightly raised off the ground and angled a little towards the second toe. That position is the whole point. As the heel lifts, the foot rolls over the raised toe instead of bending through the joint, and the ankle and the small joint near the tip of the toe take up the movement. The result is a toe that no longer bends but is strong, stable and painless to push off from.
People who have spent years walking on the outer border of the foot to keep weight off a sore toe find that, once the pain has gone, they load the foot normally again. The limp goes with the joint.
What you can do afterwards
Walk any distance. The commonest change people notice is that how far they walk is no longer decided by the toe.
Hike, cycle, training and light jogging once the fusion has knitted, building up gradually from about three months.
Wear ordinary shoes with a heel of up to about three centimetres. A stiff or rocker sole is comfortable in the early months, but most people go back to normal shoes.
Do a calf raise once the bone has healed: the fused toe acts as a firm lever, and the weight goes through it without complaint.
What you cannot do
Wear a high heel. A heel above about three centimetres needs the toe to bend upwards, and it no longer can.
Kneel on the toes or sit back on your heels with the toes folded under. Some yoga and floor positions become uncomfortable or impossible.
Go right up onto the tips of the toes, and for the first six months avoid pushing up onto the toes at all while the bone matures.
For most people that is a trade they are happy to make. It is still worth being clear about before the operation rather than after.
The first weeks
The operation is day surgery or an overnight stay. You walk from the first day in a firm post-operative shoe that puts your weight through the heel rather than the toe, with the foot up as much as possible for the first week or two. The shoe stays on for about six weeks while the bones start to knit, with an X-ray to confirm it, and then you generally move into a stiff-soled shoe. Driving a right foot is usually possible at six to eight weeks. No heavy lifting or strenuous activity for six weeks, then a gradual return. The bones are usually reasonably solid by twelve weeks; full comfort in the toe, and the swelling, take several months more. That swelling is normal and not a sign that anything has gone wrong. Full bony healing takes 6 months.
If the joint is not yet worn out
Fusion is the operation for a joint whose cartilage is gone. Where the X-ray shows cartilage worth keeping and the pain comes mainly from the bump and the spurs catching, a cheilectomy, which trims away the spurs and the worn top of the joint, is the operation instead, and it keeps the joint moving. It can be done through keyhole incisions. Nothing done at a cheilectomy prevents a fusion later if the arthritis progresses, which is why matching the operation to the X-ray matters more than choosing one in the abstract.
Why not a joint replacement?
Artificial big toe joints and synthetic cartilage implants exist, but their results have not matched fusion for lasting pain relief or durability, and when they fail the salvage is a much harder fusion with bone graft. They are not routinely available in Australia and are not offered here. Fusion remains the reliable operation for a worn-out joint.
Key points
Everyday walking uses only part of the big toe joint's movement, which is why a fused toe walks well.
The toe is fixed slightly raised so the foot rolls over it; push-off is strong and painless.
Running, hiking, gym work and most sport are possible once the bone has healed.
What you lose: heels above about three centimetres, kneeling on the toes and going right up on tiptoe.
Expect six weeks in a post-operative shoe, driving at six to eight weeks for a right foot, and swelling for months.
More detail. Not sure whether your joint should be fused or could still be kept? Big Toe Arthritis (Hallux Rigidus) covers the stages, cheilectomy, fusion, recovery and the risks of each.
Ready to discuss your treatment options?
Book a consultation with Dr Janan Chandrananth to have your big toe X-rayed and find out whether the joint should be kept or fused.
