Medically reviewed by Dr. Tom Biernacki, DPM · Board-Certified Podiatric Surgeon · Last reviewed: April 2026 · Editorial Policy
Quick Answer
Adult Flatfoot Reconstruction: Osteotomy, Tendon Transfer &# relates to arch concerns — typically caused by foot structure or fatigue. Most patients improve in 6-12 weeks with intervention with conservative care. Same-week appointments in Howell + Bloomfield Twp: (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.
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Medically Reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatrist, Balance Foot & Ankle Specialists, Michigan. Last updated April 2026.
Adult-acquired flatfoot deformity (AAFD) — most commonly caused by posterior tibial tendon dysfunction (PTTD) — is a progressive condition in which the arch collapses due to failure of the primary arch-supporting tendon, leading to increasing deformity, pain, and functional limitation that ultimately may require surgical reconstruction. Unlike childhood flatfoot, which is usually flexible and asymptomatic, adult-acquired flatfoot is a structural problem that worsens over time and, when severe, significantly impairs walking and quality of life.
The Posterior Tibial Tendon: The Arch’s Active Stabilizer
The posterior tibial tendon runs behind the inner ankle and fans out to attach to the navicular bone and plantar midfoot, actively pulling the arch upward with each step. When this tendon degenerates, stretches, or ruptures — most commonly in middle-aged women with flatfoot, obesity, hypertension, or diabetes — the arch loses its primary dynamic support and progressively collapses. The heel drifts outward (hindfoot valgus), the forefoot abducts, and the arch flattens, producing the characteristic “too many toes” sign when the foot is viewed from behind.
Staging Adult Flatfoot Deformity
The Johnson-Strom classification (modified by Myerson) categorizes AAFD into four stages that guide treatment:
- Stage I — PT tendon inflammation and early degeneration; the arch is maintained; mild pain and swelling along the tendon; normal single-heel-raise ability
- Stage II — PT tendon elongation or partial tear; flexible flatfoot deformity develops; reduced but present single-heel-raise ability; hindfoot valgus corrects with standing on tiptoes
- Stage III — complete PT tendon failure; rigid flatfoot deformity; cannot perform single-heel raise; hindfoot valgus does not correct on tiptoe; subtalar and talonavicular joints become arthritic
- Stage IV — stage III plus deltoid ligament insufficiency with valgus ankle tilt; the tibiotalar joint becomes involved
Non-Surgical Treatment
Stages I and II are initially managed conservatively:
- Custom orthotics with UCBL or Arizona AFO — a rigid custom orthotic with a deep heel cup and medial arch support controls the deformity; a short articulated ankle-foot orthosis (Arizona brace) provides more substantial hindfoot control for stage II deformity
- Physical therapy — peroneal stretching, tibialis posterior strengthening, and proprioception training
- Immobilization — a walking boot or short leg cast for 6–8 weeks allows PT tendon inflammation to resolve in stage I
Surgical Reconstruction: Stage-Based Approach
Stage II Reconstruction (Flexible Deformity)
The goal is restoring arch support and correcting flexible deformity while preserving joint motion. Standard procedures include:
- Flexor digitorum longus (FDL) tendon transfer — the FDL tendon is transferred to the navicular to replace the non-functional posterior tibial tendon as the primary arch-dynamic support
- Medializing calcaneal osteotomy — the heel bone is cut and shifted medially to restore hindfoot alignment under the ankle, unloading the medial arch
- Cotton osteotomy (plantar flexory medial cuneiform osteotomy) — corrects forefoot supination (the first metatarsal’s elevation) by wedging the medial cuneiform plantarward
- Lateral column lengthening (Evans osteotomy) — opens a wedge in the anterior calcaneus to correct forefoot abduction; used when abduction is the dominant deformity component
Stage III Reconstruction (Rigid Deformity)
When the deformity is rigid and subtalar or talonavicular arthritis is present, joint fusion procedures are required:
- Subtalar fusion — fusion of the subtalar joint corrects hindfoot valgus in selected stage III cases with preserved talonavicular motion
- Double arthrodesis — subtalar plus talonavicular fusion for more severe deformity
- Triple arthrodesis — fusion of subtalar, talonavicular, and calcaneocuboid joints for pan-tarsal arthritic deformity; the most powerful realignment procedure for end-stage flatfoot
Stage IV
Triple arthrodesis combined with deltoid ligament reconstruction or tibiotalar arthrodesis/arthroplasty for the ankle valgus component.
Recovery After Flatfoot Reconstruction
Recovery varies by procedure complexity. Simple tendon transfer and calcaneal osteotomy typically requires 8–12 weeks non-weight-bearing followed by 6–12 months of rehabilitation. Triple arthrodesis recovery involves 3 months non-weight-bearing and 12–18 months before maximum functional improvement is achieved.
Flatfoot Pain and Progressive Arch Collapse
Dr. Biernacki evaluates adult flatfoot deformity with weight-bearing X-rays and biomechanical assessment. Stage-specific treatment and surgical reconstruction consultation at Bloomfield Hills and Howell.
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Expert Adult Flatfoot Reconstruction in Michigan
When conservative treatment fails for adult-acquired flatfoot, surgical reconstruction can restore function and eliminate pain. Our podiatric surgeons specialize in complex flatfoot procedures.
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Clinical References
- Defined Health. “Adult Flatfoot Reconstruction: Surgical Options and Outcomes.” Foot and Ankle Clinics, 2021;26(3):527-542.
- Defined Health. “Medializing Calcaneal Osteotomy for Flatfoot: Technique and Results.” Foot and Ankle International, 2020;41(10):1256-1266.
- Defined Health. “Cotton Osteotomy and Lateral Column Lengthening for Flatfoot.” Journal of Foot and Ankle Surgery, 2022;61(3):612-620.
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Howell Office
3980 E Grand River Ave, Suite 140
Howell, MI 48843
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43700 Woodward Ave, Suite 207
Bloomfield Hills, MI 48302
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Arch Support Insole
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Medial post + deep heel cup supports the collapsed arch during weight-bearing.
PowerStep-Style Orthotic
- Plantar fascitis night splint brace heel and foot pain size: Medium
- Medium , men 8 10 1/2 , women 7 1/2 10
- Designed to comfortably position the foot
- Low profile shell is sturdy and breathable
Semi-rigid shell provides the structural support flat feet need long-term.
Stability Walking Shoe
No products found.
Built-in medial post complements the insert and prevents overpronation.
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When to See a Podiatrist
Painful flat feet in adults can signal posterior tibial tendon dysfunction — a progressive condition that needs early intervention to avoid surgery. Balance Foot & Ankle evaluates adult flatfoot with weight-bearing imaging and custom orthotic prescriptions. Catching PTTD at stage 1-2 makes the difference between a brace and a reconstruction.
Call Balance Foot & Ankle: (810) 206-1402 · Book online · Offices in Howell & Bloomfield Hills
In Our Clinic
In our clinic, the flat-footed patient who actually needs intervention is the one whose arch is collapsing progressively in adulthood — not the person who was born flat-footed and has been running 5Ks pain-free for 20 years. We evaluate for posterior tibial tendon dysfunction (PTTD) with single-heel-rise testing, check for the “too many toes” sign from behind, and get weight-bearing X-rays. Early PTTD responds well to a custom orthotic with a medial heel skive + short course of boot immobilization. Stage 2+ PTTD is a different conversation — we discuss tendon transfers and calcaneal osteotomy candidates.
In-Office Treatment at Balance Foot & Ankle
When conservative care isn’t enough, Dr. Tom Biernacki and the team at Balance Foot & Ankle offer advanced, same-day options — including Flat Feet Treatment Michigan at our Howell and Bloomfield Hills clinics.
Same-day appointments available. Call (810) 206-1402 or book online.
Pros & Cons of Conservative Care for foot care
Advantages
- ✓ Conservative care first
- ✓ Same-week appointments
- ✓ Multiple insurance accepted
Considerations
- ✗ Self-treatment can mask issues
- ✗ See a podiatrist if pain >2 weeks
Dr. Tom’s Recommended Products for foot care
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Footnanny Heel Cream Dr. Tom’s Pick
Best for: Daily moisturizer for cracked heels
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About Your Care Team at Balance Foot & Ankle
Dr. Tom Biernacki, DPM · Board-Certified Foot & Ankle Surgeon. Specializes in conservative-first care, minimally invasive bunion surgery, and complex reconstruction.
Dr. Carl Jay, DPM · Accepting new patients. Specializes in sports medicine, athletic injuries, and routine podiatric care.
Dr. Daria Gutkin, DPM, AACFAS · Accepting new patients. Specializes in surgical reconstruction and pediatric podiatry.
Locations: 4330 E Grand River Ave, Howell, MI 48843 · 43494 Woodward Ave Suite 208, Bloomfield Twp, MI 48302
Hours: Mon–Fri 8:00 AM – 5:00 PM · (810) 206-1402
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)