What is a Tibial Tubercle Osteotomy or Transfer (TTO)?
This is an open surgical procedure that is performed to address chronic patella (kneecap) instability. The kneecap is normally held in place by ligaments and bony architecture of the knee. This procedure is an osteotomy in which the bone is cut to relocate the insertion site of the patellar tendon toward the inside of the tibia or shin bone. This is often done in coordination with a MPFL reconstruction. The goal of these stabilizing procedures is to help prevent damage to the cartilage in the knee and the development of arthritis from continued dislocations of the kneecap. This surgical procedure has had great success in preventing the kneecap from repeat dislocations or coming out of place and restoring people’s ability to live a healthier and active lifestyle.
Who should consider this surgery?
Patients with recurrent dislocations of the kneecap and those that have anatomic factors that predispose them to future dislocations. This is normally performed in younger teenagers but some older adults can benefit from this procedure. People that have significant arthritis already may not be candidates for this procedure. In addition, smokers should not undergo this procedure as the smoking prevents the bone from healing properly.
How is this performed?
The tibial tubercle osteotomy is an open procedure that is performed under general anesthesia. The front part of the tibia or shin bone is cut and moved to the inside and held with screws. The patient will be placed in a brace and use crutches to walk in order to not place full weight down until proper healing of the bone.
Recovery:
The osteotomy or cutting of the bone can take 4-6 months for the bone to heal or fuse. Patients will start in physical therapy immediately following surgery to begin gradually regaining their range of motion in the knee, building their quadriceps strength again and slowly returning to walking. The ability to walk will slowly be advanced from no weight to full weight bearing over the course of 6-8 weeks and depending on the healing of the bone. X-rays will be required periodically until the bone is completely healed. Running or any jumping will not be recommended until the bone is completely healed and no sooner than 5 months after surgery. Return to sport usually is 9-12 months. This surgical recovery is a lengthy one but will make a big difference in improving the quality of a person’s life and giving people more confidence to return to activities you enjoy.
Who a tibial tubercle transfer is for
TTO is not a routine knee operation. It is a realignment procedure, used where the problem is that the kneecap is tracking badly because of the underlying bony geometry rather than because of soft-tissue damage alone.
It is typically considered for:
- Recurrent patellar instability where measurements show the tubercle sits too far laterally
- Patellofemoral pain with malalignment that has not responded to a genuine course of therapy
- Cartilage damage on specific parts of the kneecap, where offloading that area is part of the plan
- Instability recurring after previous soft-tissue surgery alone
It is frequently combined with MPFL reconstruction — the ligament restrains the kneecap while the osteotomy corrects the underlying alignment. Which of the two is needed, or whether both are, is exactly what the assessment is for.
Recovery timeline
Because a TTO involves cutting and re-fixing bone, the early recovery is dictated by bone healing and is more protected than a soft-tissue-only procedure.
- Weeks 0–6: protected weight-bearing on crutches, often with a brace. Motion work begins early to prevent stiffness, within set limits.
- Weeks 6–12: progression to full weight-bearing as the osteotomy heals, confirmed on X-ray. Strengthening begins.
- Months 3–6: quadriceps and hip strengthening in earnest. Most people are walking normally and managing daily life well in this window.
- Months 6–12: return to running, pivoting and sport, guided by measured strength and control rather than by the calendar.
Hardware — the screws holding the transferred bone — is sometimes removed later if it causes irritation when kneeling, which is a common enough conversation to be worth raising in advance.
Frequently asked questions
What does TTO stand for?
Tibial tubercle osteotomy, sometimes called a tibial tubercle transfer. The tibial tubercle is the bony bump below the kneecap where the patellar tendon attaches. The procedure moves that attachment point to improve how the kneecap tracks.
How long is recovery from a tibial tubercle osteotomy?
Protected weight-bearing for roughly six weeks, walking normally by around three months, and return to sport commonly between six and twelve months. Because bone has to heal, the early phase is more restricted than after soft-tissue-only surgery.
Is a tibial tubercle transfer painful?
The first couple of weeks are uncomfortable and are managed with a planned pain regimen. Because bone is cut and fixed, early pain is typically more pronounced than after arthroscopic surgery, but it settles as healing progresses.
Will I need the screws removed?
Not always. Some people are aware of the hardware when kneeling and elect to have it removed once the bone has fully healed, usually no earlier than a year. It is a smaller, separate procedure.
Next step
If this is limiting what you can do, an evaluation will tell you what is actually wrong and which treatments genuinely apply. Call 916-732-3005 or request an appointment. Related: patellofemoral instability · MPFL reconstruction · PT protocol.