A calcaneal osteotomy is a surgical procedure where a surgeon cuts and repositions the heel bone (calcaneus) to correct foot alignment problems. It’s considered a joint-sparing procedure, meaning it reshapes the bone without disturbing the nearby joints. This makes it a more conservative option compared to surgeries that fuse joints together, and it’s one of the most common corrective operations for flatfoot and high-arch deformities.
Why the Heel Bone Matters So Much
Your calcaneus is the largest bone in the foot and forms the back point of a three-point support system that keeps you balanced when you stand. It’s also where your Achilles tendon attaches. When the heel bone sits in the wrong position, it throws off the alignment of your entire foot and ankle, and it turns the Achilles tendon into a force that worsens the problem rather than helping stabilize it.
By cutting through the calcaneus and shifting or rotating the bone fragment, surgeons can realign the heel and redirect the pull of the Achilles tendon so it becomes a corrective force. That dual effect is what makes calcaneal osteotomy particularly effective for structural foot problems.
Conditions It Treats
The two main categories of foot deformity corrected by calcaneal osteotomy are flatfoot (planovalgus) and high-arch foot (cavovarus). In flatfoot, the heel tilts outward and the arch collapses, causing the foot to roll inward. In cavovarus deformity, the arch is abnormally high and the heel tilts inward, putting excessive pressure on the outer edge of the foot.
The procedure is also used to correct overcorrected clubfoot deformity and other hindfoot alignment problems that haven’t responded to bracing, orthotics, or physical therapy. It’s typically recommended when structural misalignment is the root cause, not just soft tissue weakness.
Types of Calcaneal Osteotomy
There isn’t one single technique. The type of osteotomy depends on the direction and degree of correction needed.
Sliding (Translational) Osteotomy
This is the most straightforward version. The surgeon makes a straight cut through the body of the calcaneus, then slides the back portion of the bone inward (medializing) or outward (lateralizing) to reposition the heel under the leg. A medializing slide is the standard approach for flatfoot correction, while a lateralizing slide addresses high-arch deformity. This shifts the entire weight-bearing axis of the heel.
Closing Wedge Osteotomy
For mild cavovarus (high-arch) deformity, the surgeon removes a small wedge of bone from the outer side of the calcaneus, typically 8 to 12 millimeters wide, then closes the gap. This tilts the heel into a more neutral position.
Lateral Column Lengthening (Evans Osteotomy)
This technique addresses flatfoot by lengthening the outer column of the foot. The surgeon makes a cut about 15 millimeters behind the joint at the front of the calcaneus and inserts a bone graft (often taken from the pelvis) to wedge the bone open. This pushes the front of the foot outward, restoring arch height and correcting the inward roll. It carries specific risks including chronic pain along the outer foot, joint irritation, graft displacement, and potential damage to the joint surface. A newer Z-shaped variation of this osteotomy has shown faster healing times and requires a smaller graft.
What Happens During Surgery
The procedure is performed under general or regional anesthesia. For a sliding osteotomy, the surgeon typically makes an incision on the outer side of the heel, cuts through the calcaneus with a saw or specialized burr, then shifts the bone fragment into its corrected position. A newer percutaneous technique uses small puncture incisions and a low-speed, high-torque burr to make the cut through four quadrants of the heel bone, reducing soft tissue disruption.
Once the bone is repositioned, it needs to be held in place while it heals. Surgeons use several types of hardware: screws (headed or headless), locking plates, or staples. All produce comparable healing results. However, the choice of hardware affects whether you might need a second surgery to remove it. Headed screws placed on the weight-bearing surface of the heel are the most likely to cause irritation, with higher removal rates. Plates and headless screws perform better in this regard, with hardware removal rates of roughly 5% and 7% respectively.
Nerve Injury Risk
One important risk that deserves specific attention is nerve damage. A study that systematically evaluated patients after calcaneal osteotomy found neurological injuries in 43.5% of cases, a rate far higher than what’s typically reported. Most of these were not diagnosed during routine follow-up, suggesting the problem is significantly underrecognized.
The sural nerve, which runs along the outer side of the heel, was the most commonly injured (affected in 23 of 69 patients studied). The nerves on the inner side of the foot were also frequently involved. About 9% of injuries were temporary (resolving on their own), but nearly 35% of patients had lasting nerve-related symptoms. These can include numbness, tingling, or pain along the bottom or sides of the foot. The high rate underscores the importance of discussing nerve-related risks before surgery.
Recovery and Rehabilitation
Recovery follows a predictable timeline, though the specifics depend on which type of osteotomy you had and whether it was combined with other procedures.
For the first four weeks, your foot will be immobilized in a cast or boot, and you won’t be allowed to put weight on it. During this phase, you’ll focus on keeping the rest of your leg mobile with hip and knee exercises, gentle toe movements, and lower extremity stretches. Elevation is critical during this period to control swelling.
Between weeks four and twelve, you’ll begin gradually putting weight on the foot, typically transitioning through a walking boot. Physical therapy introduces ankle and hindfoot range-of-motion exercises in all directions, along with gentle calf stretching. One important restriction: no passive stretching (where someone else forces your ankle through a range of motion) until at least the three-month mark, to protect the healing bone.
At six to eight weeks, you’ll typically have your first follow-up X-ray to confirm the bone is healing. If it looks good, you can start transitioning out of the boot and into regular shoes. Full functional rehabilitation, including more aggressive strengthening and mobility work, spans from week twelve through week twenty-four or beyond. Most people return to normal daily activities around the six-week mark after clearing their imaging check, but full recovery to sport or high-impact activity takes considerably longer.
What a Calcaneal Osteotomy Cannot Do
Because this procedure corrects bony alignment without fusing joints, it preserves your foot’s natural motion. That’s a significant advantage. But it also means the soft tissues, tendons, and ligaments that contributed to the original deformity may still need attention. Calcaneal osteotomy is frequently performed alongside tendon repairs, ligament reconstructions, or other bony procedures as part of a comprehensive correction. The osteotomy addresses the structural foundation, while the additional procedures handle the soft tissue components that allowed the deformity to develop.