| Osteotomy Type | Deformity Corrected | Technique | Fixation | Indication |
|---|---|---|---|---|
| Medial Displacement Calcaneal Osteotomy (MDCO) | Heel valgus; hindfoot valgus alignment | Transverse oblique osteotomy; calcaneal tuberosity shifted 1–1.5 cm medially | 2 cannulated screws or staple | Stage II PTTD; flexible flatfoot with predominant valgus component |
| Lateral Column Lengthening (Evans Osteotomy) | Forefoot abduction; talonavicular uncoverage; arch collapse | Anterior calcaneus osteotomy; structural bone graft inserted to lengthen lateral column | Plate ± screw; allograft or autograft | Forefoot abduction >30% talonavicular uncoverage; combined with MDCO for severe deformity |
| Cotton (Medial Cuneiform) Osteotomy | Forefoot supination; persistent forefoot varus after hindfoot correction | Dorsal opening wedge at medial cuneiform; plantarflexes 1st ray | Plate or staple; bone graft | Residual forefoot supination after MDCO + LCL; gastrocnemius recession combined |
| Calcaneal Z-osteotomy | Combined valgus + hindfoot translation | Z-shaped cut allows simultaneous medial displacement and height correction | 2–3 screws | Severe valgus with significant height loss; complex flatfoot deformity |
| Subtalar Arthrodesis | Rigid hindfoot valgus; Stage III PTTD | Fusion (not osteotomy); subtalar joint prepared and fused with screws | 2 large cannulated screws | Rigid deformity; Stage III or failed osteotomy; secondary arthritis |
| Stage (PTTD) | Deformity | PTT Status | Heel Rise Test | Treatment |
|---|---|---|---|---|
| Stage I | No deformity; medial ankle pain | Tendinopathy / partial tear | Painful but possible | PT + AFO + orthotics; no surgery needed |
| Stage II | Flexible flatfoot; heel valgus; forefoot abduction | Attenuated / elongated PTT | Weak; unable to complete 10 repetitions | MDCO ± LCL + PTT repair/augmentation + gastrocnemius recession |
| Stage III | Rigid flatfoot; hindfoot locked in valgus | Non-functional PTT | Unable | Subtalar or triple arthrodesis; no osteotomy (rigid deformity) |
| Stage IV | Rigid flatfoot + valgus ankle tilt; deltoid attenuation | Non-functional | Unable | Triple arthrodesis + deltoid ligament reconstruction; ± TAA |
Quick answer: Calcaneal Osteotomy Flatfoot Correction Michigan Podiatrist is a common foot/ankle topic that affects many patients. The 2026 evidence-based approach combines proper diagnosis, conservative-first treatment, and escalation only when needed. We treat this regularly at our Howell and Bloomfield Township practices. Call (810) 206-1402.
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Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Quick Answer:
Quick Answer: Calcaneal osteotomies are bone-cutting procedures that realign the hindfoot to correct the valgus (outward tilting) and forefoot abduction of adult flatfoot deformity — most commonly performed as part of the Stage II PTTD / adult acquired flatfoot reconstruction. Two primary osteotomy types are used: the medializing calcaneal osteotomy (MCO) translates the calcaneal tuberosity medially to shift the weight-bearing axis under the hindfoot, effectively reducing hindfoot valgus and medial column overload; the Evans procedure (lateral column lengthening calcaneal osteotomy) opens a wedge at the calcaneal anterior process to lengthen the lateral column and correct the forefoot abduction (‘too many toes sign’). Most flatfoot reconstructions use the MCO; Evans osteotomy is added when forefoot abduction exceeds 30% on radiographic talonavicular coverage angle. Both procedures are combined with tendon and ligament procedures (FDL transfer, spring ligament repair) for comprehensive reconstruction. Recovery requires 6–8 weeks non-weight-bearing followed by 3–4 months of rehabilitation.
Watch: How to Fix Flat Feet? [Collapsing Arch Pain & Flat Foot Correction!] — MichiganFootDoctors YouTube
Calcaneal osteotomies — surgical realignment of the heel bone — are the cornerstone bony correction procedure in adult flatfoot reconstruction. Without addressing the hindfoot valgus deformity that drives every aspect of the flatfoot posture, soft tissue procedures (FDL tendon transfer, spring ligament repair) will fail over time because they are mechanically overloaded by an uncorrected bony deformity. Dr. Biernacki at Balance Foot & Ankle integrates calcaneal osteotomy into a comprehensive flatfoot reconstruction strategy.
The Medializing Calcaneal Osteotomy (MCO)
The medializing calcaneal osteotomy — also called the Koutsogiannis procedure — is the most commonly performed calcaneal osteotomy in adult flatfoot reconstruction. A transverse osteotomy through the calcaneal tuberosity, approximately 1.5 cm proximal to the posterior tuber, allows the tuberosity fragment to be translated medially 8–10mm, placing the Achilles tendon’s line of action directly under the tibial mechanical axis. This effectively converts a hindfoot-valgus moment into a more neutral or slight varus position, reducing stress on the medial column and on the posterior tibial tendon/spring ligament repair. Fixation: one or two large cancellous screws driven from posterior to anterior in the heel. The patient is non-weight-bearing for 6–8 weeks until radiographic healing is confirmed.
Evans Lateral Column Lengthening
When the flatfoot deformity has significant forefoot abduction — the ‘too many toes’ sign with forefoot abducted beyond the heel by >3 toes, talonavicular coverage angle >30° — an Evans osteotomy (lateral column lengthening) is added to the reconstruction. The calcaneocuboid joint is identified; an opening wedge osteotomy is made at the anterior process of the calcaneus, and a tricortical iliac crest or allograft bone wedge is inserted to lengthen the lateral column by 8–12mm. This lengthening pushes the forefoot into adduction, correcting the ‘too many toes’ posture and improving talonavicular coverage. Evans osteotomy requires careful planning — overlengthening creates lateral column overload, causing calcaneocuboid joint pain and lateral column stress fractures.
Surgical Planning and Radiographic Assessment
Dr. Biernacki performs comprehensive weight-bearing radiographic assessment before planning any flatfoot reconstruction: AP foot: talonavicular coverage angle (normal <7°; >30° indicates Evans osteotomy); 1st/2nd metatarsal base angle; lateral foot: Meary’s angle (talo-first metatarsal angle; normal 0°; >4° indicates medial column sag requiring correction); calcaneal pitch angle (normal >18°); AP ankle: tibiotalar angle (Stage IV valgus ankle detection); hindfoot alignment view: Saltzman view for true hindfoot valgus measurement. Simulated correction on radiograph allows determination of MCO translation magnitude and Evans wedge size needed. CT scanning is added for complex or revision cases and for patients with subtalar or midfoot arthrosis requiring concurrent or alternative procedures.
Recovery and Rehabilitation
After calcaneal osteotomy (with concurrent soft tissue procedures), recovery follows a structured protocol: 0–6 weeks: non-weight-bearing cast; 6–8 weeks: X-ray confirmation of healing, transition to CAM boot, progressive protected weight-bearing; 3–4 months: transition to supportive shoes with custom orthotics; 6–12 months: progressive return to full activity. Physical therapy focuses on calf flexibility, peroneal and posterior tibial tendon strengthening, proprioception, and gait retraining. Patients require custom orthotics long-term — the reconstruction corrects deformity but the underlying ligamentous laxity and arch collapse tendency remains, requiring orthotic maintenance support.
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Post-calcaneal osteotomy patients returning to walking and running with corrected hindfoot alignment
Patients requiring custom therapeutic footwear for residual deformity accommodation
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✅ Pros / Benefits
- MCO directly corrects hindfoot valgus — the mechanical precondition for durable soft tissue repair
- Evans osteotomy simultaneously corrects forefoot abduction for comprehensive reconstruction
- Well-validated procedure with 10+ year follow-up studies demonstrating maintained correction
❌ Cons / Risks
- 6–8 weeks non-weight-bearing required post-operatively
- Evans osteotomy carries risk of lateral column overload if overcorrected
- Long-term custom orthotic use required to maintain correction in ligamentously lax patients
Dr. Tom Biernacki’s Recommendation
Calcaneal osteotomy is the foundational procedure in my flatfoot reconstruction practice. I tell patients: the tendon transfer and ligament repair are the ‘building,’ but the osteotomy is the ‘foundation.’ Without the bony realignment, the soft tissue repairs are fighting against a deforming force with every step. The technical challenge is getting the right amount of translation — enough to correct the valgus, not so much that you overcorrect or create lateral overload. Careful preoperative planning with simulated radiographic correction is essential before entering the OR.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
What is a calcaneal osteotomy and why is it needed for flatfoot?
A calcaneal osteotomy cuts through the heel bone to reposition it — correcting the hindfoot valgus (outward tipping) that drives the collapse of the medial arch. Without this bony correction, the soft tissue procedures (tendon transfers, ligament repairs) are mechanically overloaded and fail earlier. The osteotomy creates the mechanical environment in which the soft tissue repairs can work effectively.
Will I have screws in my heel after a calcaneal osteotomy?
Yes — one or two large screws are used to hold the cut calcaneal tuberosity in its new medial position until the bone heals (approximately 6–8 weeks). Most patients leave the hardware in permanently — screws are generally only removed if they cause symptoms (prominent screw head pain) after healing.
Can I walk after calcaneal osteotomy?
Not immediately — 6–8 weeks of non-weight-bearing (crutches, knee scooter, or wheelchair) are required for the osteotomy to heal before weight can be applied. Progressive weight-bearing in a boot begins after radiographic evidence of healing. Full return to walking and daily activity: typically 4–6 months after surgery.
Is flatfoot surgery the same as bunion surgery?
No — they are completely different procedures addressing different deformities. Bunion surgery corrects the first metatarsal deviation. Flatfoot reconstruction addresses posterior tibial tendon dysfunction, spring ligament failure, and hindfoot valgus with osteotomies and tendon/ligament procedures. They can be combined in carefully selected patients, but are typically addressed separately due to rehabilitation complexity.
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When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
What is Foot pain?
Foot pain is a common foot/ankle condition that affects mobility and quality of life. Understanding the underlying cause is the first step in successful treatment. Our podiatrists at Balance Foot & Ankle perform a hands-on biomechanical exam, review your activity history, and use diagnostic imaging when appropriate to identify the root cause—not just treat the symptom. Many patients have been told to “rest and ice” without a deeper diagnostic workup; our approach is different.
Symptoms and warning signs
Common signs of foot pain include pain that worsens with activity, morning stiffness, swelling, tenderness when palpated, and difficulty bearing weight. If you experience sudden severe pain, inability to walk, visible deformity, numbness or color change, contact our office the same day or visit urgent care—these can signal a more serious injury such as a fracture, tendon rupture, or vascular compromise. Diabetics with any foot wound should seek same-day care.
Conservative treatment options
Most cases of foot pain respond to non-surgical care: structured rest, supportive footwear changes, custom orthotics, targeted stretching and strengthening protocols, anti-inflammatory medications when medically appropriate, and in-office procedures such as ultrasound-guided injections. We also offer advanced therapies including MLS laser therapy, EPAT/shockwave, regenerative injections, and image-guided procedures. Treatment is sequenced from least invasive to most invasive, and we explain the rationale at every step.
When is surgery considered?
Surgery is reserved for cases that fail 3-6 months of well-structured conservative care, when there is structural pathology (severe deformity, complete tear, advanced arthritis), or when imaging shows damage that will not heal without intervention. Our surgeons have performed 3,000+ foot and ankle procedures and prioritize minimally-invasive techniques whenever appropriate. We discuss recovery timelines, return-to-activity milestones, and realistic outcome expectations before any procedure is scheduled.
Recovery timeline and prevention
Recovery from foot pain varies based on severity and chosen treatment path. Conservative cases often improve within 4-8 weeks with consistent adherence to the protocol. Post-procedural recovery may range from a few days (in-office procedures) to several months (reconstructive surgery). Long-term prevention involves footwear assessment, activity modification, structured strengthening, and regular check-ins with your podiatrist if you have a history of recurrence. We provide written home-exercise plans and digital follow-up support.
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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.
- Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
- Plantar Fasciitis (APMA)
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)