Pantalar vs Triple Arthrodesis: An Evidence-Based Guide to Hindfoot and Ankle Fusion Surgery

Key takeaways

• Triple arthrodesis fuses three hindfoot joints (subtalar, talonavicular, calcaneocuboid) and keeps the ankle moving. Long-term studies report high patient satisfaction, but ankle arthritis often develops over time.
• Pantalar arthrodesis adds an ankle (tibiotalar) fusion to a triple arthrodesis. It is a limb-salvage operation for severe, multi-joint disease, with higher complication rates and a high long-term risk of knee pain.
• The right choice depends on whether the ankle joint itself is diseased, the severity of deformity, bone quality, sensation in the foot and overall health.

What is arthrodesis?

Arthrodesis means surgically fusing two or more bones across a joint so they heal into one solid bone. Removing painful motion relieves pain and corrects deformity, at the cost of permanent stiffness at that joint. In foot and ankle surgery the goal is a plantigrade foot: one that sits flat on the ground, bears weight evenly and fits in a shoe.

What is triple arthrodesis?

Triple arthrodesis fuses the three joints of the hindfoot:

• Subtalar (talocalcaneal) joint – between the talus and calcaneus (heel bone)
• Talonavicular joint – between the talus and navicular
• Calcaneocuboid joint – between the calcaneus and cuboid

It was described by Edwin Ryerson in 1923 and remains a cornerstone operation for rigid hindfoot deformity and arthritis. Because the ankle joint is not fused, up-and-down (dorsiflexion–plantarflexion) motion is kept, while side-to-side hindfoot motion is lost.

Who is it for?

• Rigid adult-acquired flatfoot (advanced posterior tibial tendon dysfunction) with hindfoot arthritis
• Post-traumatic arthritis confined to the hindfoot joints
• Inflammatory arthritis such as rheumatoid arthritis
• Neuromuscular deformities (for example Charcot–Marie–Tooth disease, cerebral palsy, polio sequelae)
• Symptomatic tarsal coalition with arthritis, and residual clubfoot deformity

Triple arthrodesis is generally avoided when the ankle or midfoot already has advanced arthritis, because those joints take on extra stress after the hindfoot is fused.

What is pantalar arthrodesis?

Pantalar arthrodesis fuses every joint around the talus: the ankle (tibiotalar) joint plus the three hindfoot joints. In effect it is a triple arthrodesis combined with an ankle fusion, leaving a rigid but stable, plantigrade foot.

Many surgeons regard it as the last reconstructive option before amputation. Published series describe it as an effective salvage operation for severe post-traumatic arthritis and neuropathic (Charcot) arthropathy [6], and for severe paralytic deformities [4].

Who is it for?

• Arthritis or deformity involving both the ankle and the hindfoot
• Charcot (neuropathic) arthropathy with collapse of the ankle and hindfoot
• Failed ankle replacement or failed previous fusion with bone loss
• Avascular necrosis (collapse) of the talus
• Severe paralytic deformity, for example after polio

Reported contraindications include poor blood supply to the leg, active infection, chronic steroid use, immunosuppression and uncorrected deformity or contracture higher up the limb [9].

Pantalar vs tibiotalocalcaneal (TTC) arthrodesis

A TTC arthrodesis fuses only the ankle and subtalar joints and leaves the talonavicular and calcaneocuboid joints moving. It sits between an isolated ankle fusion and a full pantalar fusion, and is often enough when the transverse tarsal joints are healthy. In a multicentre series of 55 patients, TTC fusion was an effective salvage operation with a mean postoperative AOFAS ankle–hindfoot score of 66 [8].

Triple vs pantalar arthrodesis at a glance

	Triple arthrodesis	Pantalar arthrodesis
Joints fused	Subtalar, talonavicular, calcaneocuboid	Ankle plus the same three hindfoot joints
Ankle motion	Preserved	Lost
Typical patient	Hindfoot arthritis or rigid deformity with a healthy ankle	Ankle and hindfoot disease, bone loss, Charcot, failed previous surgery
Purpose	Reconstruction	Reconstruction and limb salvage
Main long-term concern	Ankle and midfoot arthritis	Knee pain and arthritis; midfoot stress
Complication risk	Moderate	High

What the evidence says: triple arthrodesis

Long-term satisfaction is high. Saltzman and colleagues followed 67 feet in 57 patients for an average of 25 and then 44 years. Despite foot pain and radiographic degeneration, 95% were satisfied and 91% said they would have the operation again [1]. Most of these patients had neuromuscular conditions such as polio, so results may differ in today's arthritis and flatfoot patients.

Correction matters. In 111 patients (132 feet) followed for a mean of 5.7 years after triple arthrodesis with rigid screw fixation, average satisfaction was 8.3 out of 10. Ankle arthritis worsened after surgery but was not associated with satisfaction, and satisfaction was closely linked to how well the deformity was corrected [2].

Function has limits. In adults with non-paralytic disease followed for a mean of 14 years, 93% were satisfied, yet only 41% could do moderate activity with little or no pain and 74% reported moderate-to-severe difficulty on uneven ground [3].

Fusion and nonunion. Fusion rates depend heavily on technique and patient factors, and studies define nonunion differently:

• A systematic review found a pooled triple arthrodesis fusion rate of about 93%, with mean time to fusion of about 17 weeks [10].
• A large single-surgeon series of 422 cases reported a clinical nonunion rate of 4.5% and infection rate of 5.9% [11].
• A German series reported nonunion in about 11% [12].
• A health-system series of 157 procedures that counted every radiographic nonunion found a much higher rate of 29.9%; the talonavicular joint was the most likely to fail (20.4%), followed by calcaneocuboid (17.2%) and subtalar (8.9%) [13].

The consistent message is that the talonavicular joint is the hardest to fuse, and that smoking, diabetes and poor bone quality raise the risk.

Adjacent-joint arthritis. In the German series, 44% of ankles and more than half of the other tarsal joints developed secondary arthritis, and two-thirds of patients had difficulty on uneven ground [12]. Not every X-ray change causes symptoms. A previous triple fusion is also a strong risk factor for nonunion if an ankle fusion is later needed: in one large arthroscopic ankle-fusion series, 70% of patients with a prior triple fusion developed nonunion compared with 5.5% without [14].

Double arthrodesis as an alternative. Fusing only the subtalar and talonavicular joints (leaving the calcaneocuboid joint) produced similar fusion rates and time to fusion in a systematic review, with fewer lateral wound problems; the authors favoured double arthrodesis where it is suitable [10].

What the evidence says: pantalar arthrodesis

Durable stability in paralytic feet. Provelengios and colleagues followed 24 patients who had pantalar arthrodesis for polio for an average of 37 years. Eleven had early complications (mainly wound-healing problems). Long-term quality of life was good, but 16 of 24 (about two-thirds) developed recurrent ipsilateral knee pain, usually starting about 21 years (range 15–30) after surgery [4].

Higher complication and nonunion rates. Acosta and colleagues reported a mean time to radiographic fusion of 23 weeks across pantalar and TTC fusions; all four feet with a failed joint fusion were in the 14-foot pantalar group [5]. In a series of post-traumatic and Charcot patients, the complication rate was 50% and four patients needed further surgery, though the authors still considered pantalar fusion a reasonable salvage option [6].

Sensation matters. An older long-term series of 83 pantalar fusions found good results in paralytic feet with normal sensation and a stable knee, whereas complications and failed fusion were common in insensate (numb) feet [7].

Modern techniques – retrograde intramedullary nails, locking plates and staged procedures – are reported to give high union rates and pain relief, but the evidence base is still mostly small retrospective series [9, 15].

The operation

Triple arthrodesis technique

Most surgeons use two incisions. The lateral (outer) incision exposes the subtalar and calcaneocuboid joints; the medial (inner) incision exposes the talonavicular joint. Remaining cartilage is removed, the bone surfaces are prepared to encourage healing, the deformity is corrected and the joints are fixed with screws, staples or plates. The aim is a heel in slight valgus (about 5°), with the forefoot level so weight is shared evenly.

Pantalar arthrodesis technique

The ankle joint is prepared as well, using extended medial and lateral incisions, an anterior approach or a fibular (transfibular) approach. Fixation may use a retrograde intramedullary nail through the heel into the tibia, plates and screws, or an external fixator when infection or poor skin is a concern. The procedure can be done in one stage or staged (triple arthrodesis first, ankle fusion later). Positioning is critical: the ankle is generally fused near neutral, with slight heel valgus and the foot turned out about 10–15° to match the other side [9].

Complications and how risk is reduced

Both operations carry risks of wound-healing problems, infection, nerve injury (especially the sural nerve on the outer foot), nonunion, malunion, hardware irritation and persistent pain. These risks are higher after pantalar arthrodesis because more joints are fused, operating time is longer and the patients often have Charcot disease, diabetes or previous surgery.

Long-term, triple arthrodesis shifts stress onto the ankle and midfoot; pantalar arthrodesis shifts it onto the knee and midfoot.

Risk can be reduced by:

• Stopping smoking well before surgery
• Good blood-sugar control in diabetes
• Checking circulation and nutrition (including vitamin D) before surgery
• Weight management
• Following the weight-bearing instructions after surgery

Recovery: what to expect

Recovery protocols vary between surgeons and patients, so the timelines below are typical rather than fixed.

Stage	Triple arthrodesis	Pantalar arthrodesis
Hospital stay	Usually 1–3 days	Usually 2–5 days
Non-weight-bearing in cast or splint	About 6–8 weeks	Often 10–12 weeks or longer
Protected walking in a boot	Further 4–6 weeks	Further 6–12 weeks
Radiographic fusion	Around 3–4 months on average [10]	Around 5–6 months on average [5]; longer in Charcot feet
Maximum improvement	About 12 months	12–24 months

Physiotherapy focuses on walking pattern, balance, and hip, knee and core strength. Most patients after pantalar arthrodesis need supportive or rocker-bottom footwear long term, and some need a brace.

Is surgery the only option?

Not always. Before fusion, most patients try:

• Custom ankle–foot orthoses or braces (a CROW walker for Charcot foot)
• Supportive or rocker-bottom footwear
• Anti-inflammatory medicines and selected injections
• Physiotherapy and activity modification

Depending on the problem, less extensive surgery may be suitable: an isolated subtalar or talonavicular fusion, double arthrodesis, corrective osteotomies, tendon transfers, TTC arthrodesis or, for isolated ankle arthritis with good bone and alignment, total ankle replacement.

Which procedure is right for you?

Triple arthrodesis is more likely if you have:

• Arthritis or rigid deformity limited to the hindfoot
• A healthy, well-aligned ankle joint
• Good bone quality and normal sensation in the foot

Pantalar arthrodesis is more likely if you have:

• Arthritis or collapse of both the ankle and hindfoot
• Severe bone loss, talar collapse or Charcot arthropathy
• A failed ankle replacement or failed previous fusion
• No reasonable reconstructive alternative short of amputation

Questions to ask your surgeon

1. Which joints are actually causing my pain, and how do you know?
2. Could a smaller fusion (subtalar, double or TTC) work for me?
3. What fusion and complication rates do you see in patients like me?
4. How will this affect my ankle, midfoot and knee over the next 20 years?
5. How long will I be off my feet and off work?
6. What can I do before surgery to lower my risks?

Frequently asked questions

How painful is recovery? Pain is greatest in the first two to three weeks and is managed with medication, elevation and immobilisation. Most patients improve steadily after the first month, though aching can continue while the bones fuse.

Can I play sports after triple or pantalar arthrodesis? After triple arthrodesis many people return to walking, cycling and swimming; running and jumping sports are usually discouraged. Long-term studies show many patients still struggle on uneven ground [3, 12]. After pantalar arthrodesis, activity is generally limited to low-impact exercise.

What happens if the bones don't fuse? A nonunion can cause ongoing pain, swelling or broken hardware. Some are painless and need no treatment; others need longer immobilisation, bone stimulation or revision surgery with bone graft.

Will the screws or plates need to come out? Usually not. Hardware is removed only if it causes irritation, and only after the fusion is solid.

When can I drive? Not while taking strong painkillers or while you cannot safely brake. After right-foot surgery this usually means waiting until you are walking well in normal footwear. Ask your surgeon and check your insurer's rules.

Will my ankle need fusing after a triple arthrodesis? Ankle arthritis on X-ray is common in the long term (around 44% in one series) [12], but many patients have few symptoms and only some need further surgery. If an ankle fusion is needed later, the risk of nonunion is higher [14].

Will pantalar arthrodesis affect my knee? Possibly. In the longest follow-up study, about two-thirds of patients developed recurrent knee pain, usually two decades after surgery [4].

Can both feet be done at once? Rarely. Because each foot needs weeks of non-weight-bearing, most surgeons stage the operations several months apart.

Is there an age limit? No fixed limit. Younger patients face a longer lifetime of stress on neighbouring joints; older patients may have health conditions that slow healing. Overall health, bone quality and goals matter more than age alone.

Expert foot and ankle care at Sports Orthopedics Institute

At Sports Orthopedics Institute, Dr. Naveen Kumar L.V. and team evaluate complex ankle and hindfoot problems with detailed examination and weight-bearing imaging, try non-surgical treatment first where appropriate, and tailor surgery to the joints that are actually diseased.

Consider a consultation if you have:

• Ankle or hindfoot pain that has not settled with non-surgical treatment
• A worsening foot deformity or difficulty fitting shoes
• Instability or difficulty walking
• Pain or deformity after previous foot or ankle surgery
• Diabetes or neuropathy with a changing foot shape

References

1. Saltzman CL, Fehrle MJ, Cooper RR, Spencer EC, Ponseti IV. Triple arthrodesis: twenty-five and forty-four-year average follow-up of the same patients. J Bone Joint Surg Am. 1999;81(10):1391-1402.
2. Pell RF 4th, Myerson MS, Schon LC. Clinical outcome after primary triple arthrodesis. J Bone Joint Surg Am. 2000;82(1):47-57.
3. Smith RW, Shen W, DeWitt S, Reischl SF. Triple arthrodesis in adults with non-paralytic disease: a minimum ten-year follow-up study. J Bone Joint Surg Am. 2004;86(12):2707-2713.
4. Provelengios S, Papavasiliou KA, Kyrkos MJ, Kirkos JM, Kapetanos GA. The role of pantalar arthrodesis in the treatment of paralytic foot deformities: a long-term follow-up study. J Bone Joint Surg Am. 2009;91(3):575-583.
5. Acosta R, Ushiba J, Cracchiolo A 3rd. The results of a primary and staged pantalar arthrodesis and tibiotalocalcaneal arthrodesis in adult patients. Foot Ankle Int. 2000;21(3):182-194.
6. Herscovici D Jr, et al. Pantalar arthrodesis for post-traumatic arthritis and diabetic neuroarthropathy of the ankle and hindfoot. Foot Ankle Int. 2011;32(6):581-588.
7. Barrett GR, Meyer LC, Bray EW 3rd, Taylor RG Jr, Kolb FJ. Pantalar arthrodesis: a long-term follow-up. Foot Ankle. 1981;1(5):279-283.
8. Chou LB, et al. Tibiotalocalcaneal arthrodesis. Foot Ankle Int. 2000;21(10):804-808.
9. Donegan RJ, Blume PA. Current concepts in pantalar arthrodesis. Podiatry Today. January 2015.
10. Double versus triple arthrodesis fusion rates: a systematic review. J Foot Ankle Surg. 2022;61(4):907-913.
11. Intermediate to long term clinical and radiographic outcomes of triple arthrodesis: a 422 case retrospective review. Foot Ankle Orthop. 2019 (conference abstract).
12. Maier F, Wiebking U, O'Loughlin PF, Krettek C, Gaulke R. Results following triple arthrodesis. In Vivo. 2023;37(2):714-.
13. Comparative nonunion rates in triple arthrodesis. J Foot Ankle Surg. PubMed ID 30253967.
14. Woods A, Kendal A, Henari S, et al. Association of preexisting triple fusion and arthroscopic ankle arthrodesis nonunion. Foot Ankle Int. 2023;44:579-586.
15. Chawla S, Brage M. Pantalar arthrodesis. Foot Ankle Clin. 2022;27(4):883-895.

This article is for general information and is not a substitute for personal medical advice. Please consult a qualified foot and ankle surgeon about your own condition.