Posterior Tibial Tendon Dysfunction Michigan 2026 | DPM

PTTD Stage	Tendon Finding (MRI)	Clinical Test	Deformity	Conservative Success	Surgical Gold Standard
Stage I — Tenosynovitis	Peritendinous edema — intact fibers	Single-leg heel rise: mildly painful but possible	None — normal alignment	80–90% with boot + orthotic	Tenosynovectomy (rarely needed)
Stage II — Flexible Flatfoot	Intratendinous tears — elongated tendon	Single-leg heel rise: 0–3 reps, weak	Flexible flatfoot — corrects on heel rise	50–60% with AFO + PT	FDL transfer + calcaneal osteotomy
Stage IIb — Forefoot Abduction	Elongated + spring ligament incompetent	Too many toes sign, forefoot abducted	Flexible flat + forefoot drift	30–40% — often surgical	FDL transfer + lateral column lengthening
Stage III — Rigid Flatfoot	Complete dysfunction — fixed deformity	Single-leg heel rise: absent	Rigid flatfoot — does NOT correct	AFO palliative only	Double or triple arthrodesis
Stage IV — Ankle Valgus	Complete + deltoid ligament compromise	Ankle valgus visible on X-ray	Ankle tilts into valgus	AFO palliative only	Triple arthrodesis ± ankle reconstruction

Treatment	Stage	Duration	Goal	Success Rate
Immobilization Boot (6 weeks)	I–II early	6 weeks NWB or protected WB	Reduce acute tendon inflammation	70–80% pain reduction
UCBL Custom Orthotic	I–IIa	Long-term daily wear	Control rearfoot valgus, reduce PT tendon load	60–75% functional improvement
Articulated AFO	IIa–IIb	Long-term daily wear	Prevent deformity progression	50–65% halt progression
Eccentric PT Tendon Rehab	I–II	12 weeks structured PT	Strengthen tendon, improve neuromuscular control	60–70% with orthotic combo
PRP Injection (PT tendon)	I–II	1–2 injections	Promote tendon fiber healing	65–75% improvement in early disease
FDL Transfer + Osteotomy	II–IIb	9–12 months recovery	Restore arch, replace failed PT function	85–90% good/excellent results
Triple Arthrodesis	III–IV	12–18 months recovery	Correct rigid deformity, eliminate pain	75–80% satisfaction

Related Conditions

Understanding the Posterior Tibial Tendon

The posterior tibial tendon (PTT) is one of the most important tendons in the foot. It runs from the calf muscle down the back of the leg, around the inner ankle, and inserts into multiple bones on the bottom of the foot — where it acts as the primary support structure for the longitudinal arch. When this tendon degenerates, the arch gradually collapses inward, producing the characteristic “too many toes” sign when viewed from behind and a progressive flatfoot deformity that worsens without treatment.

PTTD Stages and What Each Means for Treatment

Stage 1: Tendinitis without deformity — the tendon is inflamed but the arch is intact. Custom AFOs, physical therapy, and anti-inflammatory measures resolve most Stage 1 cases. Stage 2: Partial tendon tear with flexible flatfoot — the arch collapses under load but can be manually corrected. Aggressive orthotic management or tendon reconstruction surgery. Stage 3: Rigid flatfoot — the arch collapse is fixed and cannot be corrected manually. Surgical intervention is typically needed. Stage 4: Ankle arthritis develops from chronic malalignment. Complex reconstruction required.

Conservative Treatment: Custom AFOs and Physical Therapy

For Stage 1 and early Stage 2 PTTD, Dr. Biernacki prescribes a custom articulating or rigid ankle-foot orthosis (AFO) that supports the arch and controls hindfoot valgus (inward rolling). Physical therapy is prescribed to strengthen the remaining PTT and calf complex. Cortisone injection near the tendon is used cautiously — it reduces inflammation but can weaken an already compromised tendon. Most Stage 1 patients achieve long-term control with consistent AFO use and do not progress to surgery.

Surgical Options: Flatfoot Reconstruction

Flexible flatfoot that fails AFO management (Stage 2) is treated with tendon reconstruction — typically a flexor digitorum longus (FDL) tendon transfer to replace the failed PTT, combined with a calcaneal osteotomy (heel bone cut and shift) to realign the hindfoot. Additional procedures such as a medial column fusion or lateral column lengthening may be required based on the degree of deformity. Dr. Biernacki plans reconstruction based on weight-bearing X-rays and a thorough preoperative evaluation — every reconstruction is customized to the patient’s specific anatomy and stage.

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Frequently Asked Questions

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.

Frequently Asked Questions

When should I see a podiatrist?

See a podiatrist if: foot or ankle pain has lasted more than 2–4 weeks without improvement, you’re changing your gait to avoid pain, you have an open wound or sore that isn’t healing, you notice nail discoloration or thickening, you have diabetes and any foot concern, or pain is severe enough to wake you at night. Most foot conditions are easier and cheaper to treat early — what starts as a minor issue can become a surgical problem with months of delay.

What is the difference between a podiatrist and an orthopedic surgeon?

Podiatrists (DPM — Doctor of Podiatric Medicine) specialize exclusively in the foot, ankle, and lower leg. Orthopedic surgeons (MD/DO) have broader musculoskeletal training but variable foot/ankle subspecialization. For foot and ankle-specific problems, a podiatrist often has more focused training and experience. For injuries involving the leg above the ankle, complex pediatric cases, or multi-level reconstruction, orthopedic consultation may be appropriate. We frequently co-manage patients with orthopedic colleagues.

How do I know if my foot pain is serious?

Signs that warrant same-day or next-day evaluation: severe pain that appeared suddenly without clear cause, swelling, redness, and warmth that appeared suddenly (possible gout, infection, or Charcot fracture), an open wound that looks infected (redness spreading, pus, warmth), inability to bear weight, or any foot problem in a diabetic patient. Pain that’s been present for weeks and is stable is important but not an emergency — schedule within 1–2 weeks.

Can foot problems cause back and knee pain?

Yes — this is a kinetic chain effect. Abnormal foot mechanics (overpronation, supination, leg length discrepancy) cause compensatory changes in knee, hip, and lumbar alignment. Roughly 30% of patients presenting to our clinic with knee pain have a treatable foot-level biomechanical cause. Correcting foot mechanics with orthotics or appropriate footwear often provides significant knee and back relief. If you have chronic knee or back pain and haven’t had your foot mechanics evaluated, it’s worth a consult.

Are orthotics worth it?

For the right conditions, yes — custom orthotics are among the most cost-effective interventions in podiatry. They’re most effective for: plantar fasciitis, flat feet with secondary knee/back pain, leg length discrepancy, metatarsalgia, posterior tibial tendon dysfunction, and diabetic foot pressure management. Quality OTC orthotics ($35–60) resolve symptoms for 60% of patients with mild-to-moderate conditions. Custom orthotics are appropriate when OTC options have failed or when the biomechanical problem is complex. We cast custom orthotics in-office.

How do I choose the right running shoes?

Start with your foot type (flat, neutral, high arch) and running pattern (overpronator, neutral, supinator). Flat feet and overpronators do best in stability or motion-control shoes. Neutral feet do well in neutral-cushioned shoes. High arches need maximum cushioning with flexible soles. Always buy running shoes at the end of the day (foot swelling peaks then), get properly fitted by a specialist, and replace every 300–500 miles. If you’ve been injured repeatedly, a gait analysis can identify the mechanical flaw driving your injury pattern.

What is the difference between a sprain and a fracture?

A sprain is a ligament injury (the tissue connecting bones); a fracture is a break in the bone itself. Both can occur with the same trauma (ankle roll, fall). The old test — ‘if you can walk, it’s not broken’ — is wrong; many fractures are initially weight-bearable. Key differences: a fracture typically produces localized bone tenderness along the bone itself, while a sprain is tender over the ligament. X-ray is the standard to differentiate. High-grade sprains without proper treatment can be as disabling as fractures.

How do I prevent foot and ankle injuries?

The four most impactful prevention strategies: (1) Supportive, appropriately fitted footwear for your foot type and activity. (2) Gradual activity progression — the 10% rule (never increase weekly mileage or intensity by more than 10%). (3) Regular calf and ankle mobility work. (4) Strengthening the posterior tibial tendon, peroneals, and intrinsic foot muscles. Most overuse injuries are preventable; most acute injuries are not — but ankle sprain recurrence (60–70% without rehab) is prevented by balance and proprioception training.

AAOS: Posterior Tibial Tendon Dysfunction

In-Office Treatment at Balance Foot & Ankle

If home treatment isn’t providing relief for your foot and ankle issues, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.

Related Care at Balance Foot & Ankle

Clinical foot and ankle services at our Howell and Bloomfield Hills offices.

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