✅ Medically reviewed by Dr. Tom Biernacki, DPM — Board-certified podiatrist specializing in foot & ankle surgery. View credentials.

What Is a Calcaneus Fracture?

The calcaneus—the heel bone—is the largest bone in the foot and the one most commonly fractured in the foot. Calcaneus fractures account for approximately 60% of all tarsal bone fractures and 2% of all fractures. They are serious injuries: the calcaneus serves as the foundation of the hindfoot, supports the majority of body weight, and houses the subtalar joint that governs rearfoot motion. A displaced calcaneus fracture can permanently alter heel geometry, cause post-traumatic subtalar arthritis, and produce years of disability if not treated appropriately.

The vast majority (75%) of calcaneus fractures are intra-articular—involving the posterior facet of the subtalar joint. These are more complex and have higher complication rates than extra-articular fractures. The classic mechanism is axial loading from a fall from height (landing on the heels) or a motor vehicle accident. Workers’ compensation cases involving falls from ladders or scaffolding are common. Bilateral calcaneus fractures occur in 10% of cases from high-energy falls. Associated injuries—lumbar spine compression fractures, contralateral calcaneus fractures, and pelvic injuries—occur in significant proportions and must be evaluated after high-energy calcaneus fractures.

Diagnosis

Diagnosis is confirmed with weight-bearing or non-weight-bearing X-rays, which demonstrate calcaneal height loss (Bohler’s angle decrease from the normal 20–40 degrees) and fracture pattern. CT scan is essential for operative planning—it characterizes fracture morphology (Sanders classification I–IV), subtalar joint involvement, fragment comminution, and the position of the peroneal tendons. The Sanders classification guides surgical decision-making: Type I (non-displaced) and some Type II fractures are candidates for non-operative management; Types III–IV have complex comminution often requiring surgical reconstruction or primary fusion.

Treatment Options

Non-Operative Management

Non-displaced or minimally displaced calcaneus fractures (Sanders Type I), extra-articular fractures, and elderly or medically compromised patients who cannot safely undergo surgery are managed non-operatively. Treatment involves non-weight-bearing in a splint for the initial acute period (controlling swelling), followed by transition to a cast or boot. Non-weight-bearing continues for 8–12 weeks, then gradual weight-bearing resumes. This approach avoids surgical risks but accepts the position the fracture is in—patients with significant calcaneal height loss may have difficulty with shoe wear, widened heel, and subtalar arthritis long-term.

Open Reduction and Internal Fixation (ORIF)

Surgical ORIF reconstructs the subtalar joint surface, restores calcaneal height and width, and aligns the hindfoot—with the goal of reducing the rate of post-traumatic subtalar arthritis. The extended lateral approach allows visualization of the posterior facet for anatomic reduction, fixed with screws and a lateral plate. Surgery must be timed appropriately—typically performed when the initial fracture blisters have resolved and the skin is in adequate condition, usually 5–14 days post-injury. Earlier or later surgery has higher wound complication rates. Major complications include wound healing problems (occurring in 5–15% of cases) and deep infection—risk is significantly elevated in smokers and diabetics.

When performed in appropriate patients by experienced surgeons, ORIF provides better functional outcomes for Sanders Type II and selected Type III fractures compared to non-operative care in multiple studies—particularly for younger, active patients. The multicenter CARE trial remains the landmark study demonstrating surgical superiority for displaced intra-articular calcaneus fractures in workers and manual laborers.

Primary Subtalar Fusion

For severely comminuted fractures (Sanders Type IV), where anatomic reduction of the subtalar joint is not achievable, primary subtalar arthrodesis (immediate fusion of the subtalar joint at the time of fracture fixation) is preferred over ORIF in many centers. This approach eliminates the subtalar joint—which will inevitably develop severe arthritis—at the outset, using the operation to restore calcaneal shape and hindfoot alignment while simultaneously addressing the joint. Outcomes data supports primary fusion for severe Type IV fractures as superior to ORIF followed by late arthrodesis.

Recovery

Calcaneus fracture recovery is among the longest of any foot and ankle injury. Non-weight-bearing continues for 8–12 weeks whether operative or non-operative. Progressive weight-bearing in a boot at 10–12 weeks, transitioning to a shoe with an orthotic at 4–6 months. Return to light work at 3–6 months; return to manual labor or high-demand activity at 9–18 months. Swelling persists for 12–18 months. Subtalar arthritis—even in patients with anatomically restored joints—develops in a proportion of patients over 5–10 years and may ultimately require subtalar fusion as salvage (10–20% of patients following ORIF). Patient expectations must be set realistically: calcaneus fractures cause prolonged disability and full recovery takes 1–2 years.

Frequently Asked Questions

Medical References & Sources

• PubMed Research — Calcaneus Fracture ORIF Studies
• American Orthopaedic Foot & Ankle Society — Calcaneus Fractures
• PubMed Research — Primary Subtalar Fusion for Calcaneus Fracture

Dr. Tom Biernacki, DPM is a board-certified podiatric surgeon at Balance Foot & Ankle in Howell and Bloomfield Hills, Michigan. He evaluates and treats calcaneus fractures with CT-guided classification, non-operative management, ORIF, and primary subtalar fusion, with long-term follow-up for post-traumatic arthritis management.

Calcaneus (Heel Bone) Fracture — Specialized Surgical Care

Clinical References

1. Buckley R et al. Operative compared with nonoperative treatment of displaced intra-articular calcaneal fractures. J Bone Joint Surg Am. 2002;84(10):1733-1744.
2. Sanders R. Displaced intra-articular fractures of the calcaneus. J Bone Joint Surg Am. 2000;82(2):225-250.
3. Griffin D et al. Operative versus non-operative treatment for closed, displaced, intra-articular fractures of the calcaneus. BMJ. 2014;349:g4483.