Knowing how to treat clubfoot relapse is essential for any family managing this condition, because relapse is a known and manageable part of the clubfoot treatment story. While the word "relapse" sounds alarming, the reality is that most recurrences respond well to prompt, appropriate intervention — often without extensive surgery. This evidence-based guide covers every treatment option, from repeat casting through to surgical procedures, with expected timelines and outcomes for each approach.
Understanding Why Treatment Approach Varies
The treatment for a clubfoot relapse depends on several factors:
- The child's age: Younger children typically respond better to repeat casting; older children may need surgical input
- The component of deformity that has recurred: Equinus (downward pointing), forefoot adductus, or dynamic supination each have different optimal treatments
- Whether the relapse is dynamic or fixed: Dynamic relapse (only visible during walking) is managed differently from fixed relapse (present at rest)
- Previous treatments: A first relapse in a young child has different options than a third relapse in a school-age child
- The presence of underlying conditions: Syndromic clubfoot may require modified approaches
Repeat Ponseti Casting
For most early relapses detected in children under 2-3 years of age, repeat Ponseti casting is the first-line treatment. This is particularly effective when the relapse involves forefoot adductus and/or equinus components.
What to Expect
- Number of casts: Typically 2-4 casts, compared to the 4-7 required for initial correction. Repeat correction usually requires fewer casts because the foot has already been partially corrected.
- Frequency: Weekly cast changes, identical to the original protocol
- Duration: 2-4 weeks of casting, followed by return to boots and bar
- Repeat tenotomy: If the equinus component has recurred (tight Achilles tendon), a repeat Achilles tenotomy may be performed. This is safe and effective even as a second procedure.
Success Rates
Repeat Ponseti casting for early relapse has success rates of 70-90%, particularly when followed by renewed commitment to brace wear. The key is addressing the relapse promptly — before the deformity becomes fixed — and ensuring that the brace protocol is fully reinstated afterwards.
Renewed Brace Protocol
After repeat casting, the boots and bar brace protocol typically restarts as if from the beginning:
- Full-time wear (23 hours/day) for 3 months
- Night-time wear (12-14 hours/day) until age 4-5 years, or longer if the clinician advises
If brace non-compliance contributed to the relapse, the treating team should explore the reasons and work with the family to improve adherence. Sometimes a different brace type (such as a Dobbs bar) or practical support from a peer support network can make compliance more achievable.
Tibialis Anterior Tendon Transfer (TATT)
The tibialis anterior tendon transfer is the most common surgical procedure for dynamic clubfoot relapse — where the foot appears corrected at rest but turns inward during walking. This dynamic supination pattern results from overactivity of the tibialis anterior muscle pulling the foot inward, combined with relative weakness of the peroneal muscles on the outer side.
Who Is a Candidate
TATT is typically performed in children aged 2.5-6 years who have:
- Dynamic supination (foot turns in during walking)
- Good passive correction (the foot can be moved to a normal position manually)
- Recurrence despite adequate brace wear
- A well-corrected hindfoot (the problem is forefoot-driven)
The Procedure
The tibialis anterior tendon is detached from its normal insertion on the inner side of the foot and reattached to the outer (lateral) side, specifically to the lateral cuneiform or cuboid bone. This rebalances the muscle forces across the foot, converting the tibialis anterior from a deforming force to a corrective one.
The operation is performed under general anaesthetic, takes approximately 60-90 minutes, and requires a cast for 6 weeks post-operatively.
Recovery and Outcomes
- Hospital stay: Typically 1 day (day case or overnight)
- Cast duration: 6 weeks post-operatively
- Weight-bearing: Usually permitted in the cast from 2-3 weeks
- Return to normal activities: 3-4 months
- Success rate: 80-90% correction of the dynamic supination
- Further relapse after TATT: Approximately 10-15% may need additional treatment
TATT is widely regarded as one of the most effective procedures in clubfoot management, with published long-term outcomes showing sustained correction in the majority of patients.
Extended Casting and Bracing for Older Children
For children aged 3-6 years with a fixed (rather than dynamic) relapse, extended Ponseti casting may still be effective but typically requires more casts than in younger children. The approach is the same — weekly cast changes with gradual correction — but the foot may be stiffer and take longer to respond.
Some centres use above-knee casts (rather than below-knee) for relapse in older children, as these provide better rotational control of the hindfoot.
Surgical Options for Resistant Relapse
When repeat casting and TATT are insufficient, or when the relapse involves significant fixed bony deformity, surgical correction may be necessary.
Posterior Release
A posterior release addresses persistent equinus (downward pointing) by surgically lengthening the Achilles tendon and releasing tight structures at the back of the ankle. This is more extensive than a simple tenotomy and involves releasing the posterior ankle capsule and sometimes the subtalar joint capsule.
Comprehensive Soft Tissue Release
Also known as a posteromedial release, this more extensive procedure addresses multiple components of the deformity by releasing tight tendons, ligaments, and joint capsules on the inner and back of the foot and ankle. While effective at achieving correction, this procedure carries a higher risk of long-term stiffness and is avoided when possible in the Ponseti era.
Bony Procedures
In older children (typically over age 5-6) with significant residual bony deformity, osteotomies (bone cuts and realignment) may be needed. These include:
- Lateral column shortening: Removing a small wedge of bone from the outer side of the foot to correct forefoot adductus
- Calcaneal osteotomy: Shifting the heel bone to correct persistent varus
- Midfoot osteotomy: Correcting residual cavus or rocker-bottom deformity
External Fixation (Ilizarov/Taylor Spatial Frame)
For the most severe and resistant relapses, particularly in older children and adolescents, gradual correction using a circular external fixator (Ilizarov frame or Taylor Spatial Frame) may be offered. This involves:
- A metal frame attached to the bones with thin wires or half-pins
- Gradual daily adjustments (a few millimetres) over 6-12 weeks
- Total treatment time of 3-6 months including frame removal and rehabilitation
External fixation is reserved for complex cases and is typically managed at specialist centres. For adults with severe residual deformity, see our guide to adult clubfoot surgery.
Treatment Decision Framework
A simplified framework for relapse treatment decisions:
- Early relapse, child under 3, flexible deformity → Repeat Ponseti casting + renewed brace protocol
- Dynamic supination, child 2.5-6 years, good passive correction → TATT (possibly combined with repeat casting)
- Fixed relapse, child under 5 → Extended Ponseti casting, possibly with repeat tenotomy
- Fixed relapse, child over 5 → Casting + surgical correction (TATT, bony procedures, or soft tissue release as needed)
- Severe resistant relapse, older child/adolescent → External fixation or comprehensive reconstruction
The treating team will tailor the approach to your child's specific situation. Getting a second opinion from a Ponseti specialist is always reasonable if you have concerns about the proposed treatment plan.
Outcomes After Relapse Treatment
The overall prognosis after clubfoot relapse treatment is good. Key statistics from published research:
- 80-90% of relapses treated with repeat casting achieve satisfactory correction
- 85-95% of TATT procedures successfully correct dynamic supination
- The majority of children with treated relapse achieve functional, plantigrade (flat on the ground) feet
- Long-term studies show that most adults who had childhood relapse treatment have good functional outcomes, though some have reduced ankle flexibility compared to those who never relapsed
The message for parents is that relapse, while concerning, is a treatable complication with well-established management strategies. Early detection and prompt treatment produce the best outcomes — which is why ongoing vigilance and brace compliance are so important.
Frequently Asked Questions
Q: Does my child need to go under general anaesthetic for repeat casting?
A: No. Repeat Ponseti casting is performed in the outpatient clinic without anaesthesia, just like the original casting. The child may experience brief discomfort when the old cast is removed and the new one applied, but the process takes only 15-20 minutes and is well-tolerated by most children.
Q: How soon after detecting relapse should treatment start?
A: As soon as possible. Once relapse is confirmed by the orthopaedic team, treatment should begin without unnecessary delay. Early intervention — when the deformity is still flexible — produces better outcomes and requires less extensive treatment than addressing a long-established recurrence.
Q: Will my child need to go back into full-time boots and bar after relapse treatment?
A: Typically yes. After repeat casting for relapse, the brace protocol usually restarts from the full-time phase (23 hours/day for 3 months, then night-time only). This is crucial for maintaining the re-achieved correction and preventing further relapse.
Q: Is TATT a major operation?
A: TATT is classified as a moderate surgical procedure. It's performed under general anaesthetic and involves moving a tendon, but it's a well-established operation with a high success rate and relatively straightforward recovery. Most children return to normal activities within 3-4 months. Complications are uncommon.
Q: Can clubfoot relapse more than once?
A: Yes, repeat relapses can occur, though each subsequent relapse is less common than the first. With each episode of re-correction and renewed brace compliance, the probability of further relapse decreases. The treatment approach is tailored to the specific pattern of recurrence each time.