Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Calcaneal fractures — intra-articular fractures of the heel bone involving the posterior facet of the subtalar joint — are devastating injuries that result from axial loading (fall from height, motor vehicle accident) and carry a high rate of long-term disability, chronic subtalar arthritis, and prolonged recovery regardless of treatment. The Sanders CT classification system guides surgical vs. non-operative management decisions, and the outcomes of surgical fixation continue to improve with advances in implant design, minimally invasive techniques, and surgical timing protocols.

Mechanism and Sanders Classification

Calcaneal fracture mechanism: the talus drives inferiorly into the calcaneus during axial loading, shattering the posterior facet (the primary weight-bearing surface of the subtalar joint) and often the lateral wall of the calcaneus; the ‘primary fracture line’ exits lateral to produce the characteristic flattening of the Bohler angle (normal 25–40°) and widening of the heel. Sanders CT classification (based on coronal CT images at the widest point of the posterior facet): Type I — non-displaced (all types); Type II — one fracture line in the posterior facet (2 fragments — IIA, IIB, IIC based on location); Type III — two fracture lines creating three fragments; Type IV — highly comminuted (more than three posterior facet fragments). Outcomes correlation: Type I and II fractures have the best outcomes; Type IV fractures have such poor outcomes with ORIF that primary subtalar arthrodesis is often recommended.

Surgical Management

Timing: the ‘wrinkle sign’ — soft tissue wrinkling over the lateral heel indicating subsidence of swelling — identifies the safe surgical window (10–21 days post-injury); operating through the initial swollen tissue results in wound breakdown in up to 25% of cases. Approach: the extensile lateral approach provides complete visualization of the posterior facet for anatomic reduction; an L-shaped incision elevates the lateral soft tissue flap as a single unit; the peroneal tendons are retracted superiorly. Reduction: restoration of Bohler angle and Gissane angle on lateral X-ray; anatomic reduction of the posterior facet fragments under direct visualization; calcaneal height restoration. Fixation: low-profile locking plates designed for the lateral calcaneal wall; bone graft for sustentaculum tali defects. Outcomes: anatomic reduction significantly reduces the rate of symptomatic subtalar arthritis (12% vs. 50% with non-operative in Sanders II–III); most patients have some residual limitations. Dr. Biernacki at Balance Foot & Ankle performs calcaneal fracture ORIF and primary subtalar arthrodesis for severely comminuted heel fractures. Call (810) 206-1402 at our Bloomfield Hills or Howell office.

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Frequently Asked Questions

When should I see a podiatrist?

See a podiatrist for any foot or ankle pain that persists more than 2 weeks, doesn’t improve with rest, limits your daily activities, or is accompanied by swelling, numbness, or skin changes. People with diabetes or circulation problems should see a podiatrist regularly even without symptoms.

What does a podiatrist treat?

Podiatrists diagnose and treat all conditions of the foot, ankle, and lower leg including plantar fasciitis, bunions, hammertoes, toenail problems, heel pain, nerve pain, diabetic foot care, sports injuries, fractures, and foot deformities — both surgically and non-surgically.

What can I expect at my first podiatry visit?

Your first visit includes a full medical history, physical examination of your feet and gait, and in-office diagnostic imaging if needed (X-rays, ultrasound). We’ll discuss your diagnosis and create a personalized treatment plan. Most visits take 30–45 minutes.

Need Treatment at Balance Foot & Ankle?

Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin see patients at our Howell and Bloomfield Township offices.

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Calcaneal Fracture Treatment in Michigan

Balance Foot & Ankle treats calcaneal fractures using Sanders CT classification to guide optimal treatment — from conservative casting to ORIF with anatomic joint restoration.

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Clinical References

1. Sanders R, et al. Operative treatment in 120 displaced intraarticular calcaneal fractures. Clin Orthop Relat Res. 1993;(290):87-95.
2. 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.
3. Rammelt S, Zwipp H. Calcaneus fractures: facts, controversies and recent developments. Injury. 2004;35(5):443-461.