Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
| Feature | Bipartite Sesamoid | Sesamoid Fracture | Sesamoiditis |
|---|---|---|---|
| Cause | Developmental variant (congenital) | Acute trauma or stress | Repetitive overload |
| X-ray appearance | Smooth, rounded edges; often bilateral | Sharp, irregular fracture line | Normal bone, soft tissue swelling |
| Onset | Incidental finding or gradual | Sudden after injury | Gradual with activity increase |
| Bilateral occurrence | 25–33% of cases | Rare (bilateral) | Can be bilateral |
| MRI finding | Fibrocartilaginous bridge between fragments | Edema, disrupted trabecular pattern | Bone marrow edema, intact structure |
| Conservative success rate | 85–90% | 70–80% | 90%+ |
| Average recovery | 6–12 weeks | 6–8 weeks (non-displaced) | 4–8 weeks |
| Treatment Option | Best For | Duration | Expected Outcome |
|---|---|---|---|
| Dancer’s pad / sesamoid pad | Mild to moderate pain | Ongoing as needed | Offloads pressure, reduces pain 60–80% |
| Custom orthotics | Recurrent or chronic symptoms | Long-term use | Redistributes forefoot load |
| NSAID anti-inflammatories | Acute flares | 1–2 weeks | Pain and swelling reduction |
| Activity modification | Athletes with overuse pain | 4–8 weeks | Allows tissue healing without surgery |
| Corticosteroid injection | Persistent inflammation unresponsive to rest | Single dose, repeat PRN | Temporary relief, not curative |
| Sesamoidectomy (surgery) | Failed conservative care >6 months | Recovery 6–12 weeks | 90%+ pain relief, some transfer metatarsalgia risk |
Quick answer: Bipartite Sesamoid 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 Hills practices. Call (810) 206-1402.
Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatrist | Balance Foot & Ankle, Michigan
The most important clinical decision with Bipartite Sesamoid isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
The most important clinical decision with Bipartite Sesamoid isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
What Is the Sesamoid Bone and Why It Matters
Two sesamoid bones (medial and lateral) sit within the flexor hallucis brevis tendons under the first metatarsal head — functioning as pulleys and load-distributors for big toe push-off. The medial (tibial) sesamoid is the most commonly symptomatic. Bipartite sesamoid — where the medial sesamoid forms in two pieces separated by fibrocartilage — is a developmental normal variant affecting approximately 10–30% of the general population. Bilateral bipartite sesamoid (present in both feet) occurs in up to 85% of cases where one is identified — this bilaterality strongly supports developmental variant over acute fracture.
Distinguishing Bipartite Sesamoid from Acute Fracture
This is the central diagnostic challenge. Radiographic features of bipartite sesamoid: smooth, round, well-corticated edges at the separation; equal-sized fragments; typically bilateral; no acute trauma correlating with the finding. Radiographic features of acute sesamoid fracture: irregular, sharp fracture edges without cortication; acute onset correlating with specific mechanism (forefoot hyperextension, fall, direct blow); unilateral; bone scan or MRI shows marrow edema. Clinical correlation is essential: if the patient has had the “bipartite” appearance on prior X-rays with no symptoms and no new trauma, it is reliably a developmental variant.
When Bipartite Sesamoid Becomes Painful
Bipartite sesamoids can become symptomatic when the fibrocartilage junction between the two fragments is stressed — from repetitive loading, forefoot hyperextension injury, or biomechanical overload (dancers, athletes). This is called symptomatic bipartite sesamoid or sesamoiditis. Management: offloading the sesamoid with a J-shaped pad cut to deflect pressure away from the first metatarsal head, custom orthotics with sesamoid relief, activity modification, and occasionally cortisone injection into the sesamoid region. Surgical excision of one fragment is reserved for refractory symptomatic cases after conservative management fails.
Frequently Asked Questions
Does a bipartite sesamoid need treatment?
Only if symptomatic. Asymptomatic bipartite sesamoids — incidentally found on X-ray for another complaint — require no treatment. Symptomatic cases are treated conservatively first, with surgery reserved for the small minority that doesn’t respond.
Can a bipartite sesamoid be mistaken for a fracture in the ER?
Yes, very commonly — the two-fragment appearance on non-weight-bearing X-ray in the ER setting, without prior comparison X-rays, is frequently misread as acute fracture. Proper management is determined by the clinical history (Was there acute trauma? Is this a new finding?) and ideally by comparison with the other foot or prior imaging.
Michigan Foot Pain? See Dr. Biernacki In Person
Same-week appointments at our Howell and Bloomfield Hills offices.
📞 (810) 206-1402 Book Online →When Shoes Aren’t Enough — Dr. Tom’s Top 9 Orthotics
About 30% of patients I see for foot pain need MORE than a great shoe — they need a structured insole. Below: my complete 2026 orthotic ranking with pros, cons, and the specific patient I’d give each one to.
★ DR. TOM’S COMPLETE 2026 ORTHOTIC RANKING
9 Best Prefab Orthotics by Use Case
PowerStep, CURREX, Spenco, Vionic, and Tread Labs — every orthotic I’ve fitted to thousands of patients across both Michigan offices. Each card includes pros, cons, and the specific patient I’d give it to. Real Amazon ratings, review counts, and prices below.
Best All-Purpose Orthotic for Most Patients
Semi-rigid arch shell + dual-layer cushion + deep heel cup. The orthotic I’ve fitted to more patients than any other for 15 years. APMA-accepted. Trim-to-fit design works in athletic shoes, casual shoes, and most work boots.
✓ Pros
- Semi-rigid arch shell provides true biomechanical correction
- Deep heel cup centers the heel and reduces lateral instability
- Dual-layer cushion (top + bottom) lasts 9-12 months daily wear
- Available in 8 sizes for precise fit
- APMA-accepted and clinically validated
- APMA-accepted with superior cushioning versus rigid alternatives
✗ Cons
- Too thick for most dress shoes (use ProTech Slim instead)
- Some break-in period required (3-7 days for arch tolerance)
- Not enough correction for severe pes planus or rigid pes cavus
Dr. Tom’s Recommendation: If a patient has run-of-the-mill plantar fasciitis, mild flat feet, or arch fatigue, this is the first orthotic I try. Better value than most premium alternatives for 90% of patients, which is why it’s the first orthotic I reach for in the clinic. Sub-$50 typically.
Maximum Motion Control · Flat Feet & Severe Over-Pronation
PowerStep’s most aggressive stability orthotic. Adds a 2°-7° medial heel post on top of the standard PowerStep platform — designed specifically for flat-footed patients and severe pronators who need real corrective force.
✓ Pros
- 2°-7° medial heel post adds aggressive pronation control
- Same trusted PowerStep arch shell, more correction
- Built specifically for flat-foot biomechanics
- Excellent for posterior tibial tendon dysfunction (PTTD)
- Removable top cover for cleaning
✗ Cons
- Too aggressive for neutral-arch patients
- Needs longer break-in (10-14 days) due to stronger correction
- Adds 2-3 mm of stack height — won’t fit slim dress shoes
Dr. Tom’s Recommendation: When a patient comes in with significant flat feet AND symptoms (heel pain, arch pain, knee pain), the Original PowerStep isn’t aggressive enough. The Maxx is what gets prescribed. About 25% of my flat-footed patients end up here.
Low-Profile · Fits Dress Shoes & Narrow Casuals
3 mm slim profile with podiatrist-designed tri-planar arch technology. Engineered specifically to fit inside dress shoes, oxfords, loafers, and women’s flats without crowding the toe box. Vionic was founded by an Australian podiatrist.
✓ Pros
- 3 mm slim profile (vs 7-10 mm for standard orthotics)
- Tri-planar arch technology adds support without bulk
- Built-in deep heel cup despite slim design
- Fits dress shoes WITHOUT having to remove the factory insole
- Trim-to-fit · APMA-accepted
✗ Cons
- Less arch support than full-volume orthotics
- Top cover wears faster than thicker alternatives
- Not enough correction for severe foot deformities
Dr. Tom’s Recommendation: My default when a patient says ‘I need orthotics but I have to wear dress shoes for work.’ Slim enough to fit in oxfords and pumps without the heel sliding out. The single highest-impact change you can make for office workers with foot pain.
Built-In Metatarsal Pad · Morton’s Neuroma · Ball-of-Foot Pain
Standard Pinnacle orthotic with a built-in metatarsal pad positioned proximal to the metatarsal heads — the exact location that offloads neuromas and metatarsalgia. No need for separate met pads or pad placement guesswork.
✓ Pros
- Built-in met pad eliminates DIY pad placement errors
- Specifically designed for Morton’s neuroma + metatarsalgia
- Same trusted PowerStep arch + heel cup platform
- Top cover protects sensitive forefoot skin
- Faster relief than orthotics + add-on met pads
✗ Cons
- Met pad position is fixed (can’t fine-tune individual placement)
- Some patients with very small or very large feet need custom
- Slightly thicker than the standard Pinnacle
Dr. Tom’s Recommendation: If a patient has Morton’s neuroma, sesamoiditis, or generalized ball-of-foot pain (metatarsalgia), this saves a clinic visit and a prescription. The built-in pad placement is anatomically correct for 80% of feet. Way better than DIY met pads.
Adaptive Dynamic Arch · Athletic & Daily Wear
Currex’s flagship adaptive arch technology — the orthotic flexes with your gait instead of fighting it. Different stiffness zones along the length give you targeted support at the heel, midfoot, and forefoot. Available in three arch heights (low/medium/high).
✓ Pros
- Dynamic flex zones adapt to natural gait cycle
- Three arch heights ensure precise fit
- Lighter than rigid orthotics (no ‘heavy foot’ feel)
- Excellent for runners and athletic walkers
- European podiatric design (German engineering)
✗ Cons
- More expensive than PowerStep Original ($55-65 typically)
- Less aggressive correction than Pinnacle Maxx for severe cases
- Three arch heights means you must self-select correctly
Dr. Tom’s Recommendation: I started recommending Currex three years ago for runners who said PowerStep felt ‘too rigid.’ The dynamic flex zones respect natural gait. Best for active patients who walk 8K+ steps daily and don’t need maximum motion control.
Running-Specific · Heel Strike + Forefoot Strike Compatible
Currex’s purpose-built running orthotic. The midfoot flex zone is positioned for runner’s gait mechanics, with a flared heel cushion for heel strikers and a forefoot rocker for midfoot/forefoot strikers. Tested on 1000+ runners during product development.
✓ Pros
- Designed by German biomechanics lab specifically for runners
- Dynamic arch flexes with running gait (not static like PowerStep)
- Three arch heights (low/medium/high)
- Reduces overuse injury risk in mid-distance runners
- Lightweight (no impact on cadence)
✗ Cons
- Premium price ($60-75)
- Not aggressive enough for severe over-pronators (use Pinnacle Maxx)
- Runner-specific design = less ideal for daily walking shoes
Dr. Tom’s Recommendation: If a patient runs 20+ miles per week and has plantar fasciitis or shin splints, this is the orthotic I prescribe. The dynamic flex zones respect running biomechanics in a way that no rigid PowerStep can match. Pricier but worth it for serious runners.
Cavus Foot & High-Arch Patients
Polyurethane base with a deeper heel cup and higher arch profile than PowerStep — built for cavus (high-arched) feet that need maximum cushion and support. The 5-zone cushioning system addresses the unique pressure points of high-arch feet.
✓ Pros
- Deeper heel cup centers the heel for cavus foot stability
- Higher arch profile fills the void under high arches
- 5-zone cushioning addresses cavus foot pressure points
- Polyurethane base lasts 12+ months
- Available in Wide width
✗ Cons
- Too tall/aggressive for normal or low arches
- Won’t fit slim dress shoes
- Pricier than PowerStep Original
- Some patients find the arch height uncomfortable initially
Dr. Tom’s Recommendation: Cavus foot patients are often misdiagnosed and given low-arch orthotics — that makes everything worse. Spenco’s Total Support has the arch profile that high-arch feet actually need. About 15% of my patients have cavus feet; this is what they wear.
Cushion Layer · Standing All Day · Gel Pressure Relief
NOT a true biomechanical orthotic — this is a cushion insole. But for patients who want gel pressure relief instead of arch correction (or to add ON TOP of factory insoles in work boots), this is the best gel option on Amazon.
✓ Pros
- Genuine gel cushioning (not foam pretending to be gel)
- Targeted gel waves under heel and ball of foot
- Trim-to-fit · works in most shoe types
- Sub-$15 price (most affordable option in this list)
- Massaging texture is genuinely soothing
✗ Cons
- ZERO arch support — this is cushion only
- Won’t fix plantar fasciitis or flat-foot issues
- Compresses faster than PowerStep (4-6 months)
- Top cover wears through in high-mileage applications
Dr. Tom’s Recommendation: I recommend these to patients who tell me ‘I just want my feet to stop hurting at the end of my shift’ and who don’t have a biomechanical issue. Construction workers, factory workers, retail. Pure cushion does the job for them.
Tight-Fitting Shoes · Cycling Shoes · Hockey Skates
Tread Labs Pace insole with firm orthotic arch support for flat feet and plantar fasciitis relief. The replaceable top cover design makes it one of the most durable picks in this guide — backed by a million-mile guarantee and recommended for tight-fitting athletic footwear.
✓ Pros
- Firm orthotic arch support shell (podiatrist-grade)
- Slim profile fits tight athletic footwear
- Lasts 12+ months daily wear
- Excellent for cycling shoes specifically
- Built-in odor-control treatment
✗ Cons
- Premium price ($45-55)
- Less cushion than PowerStep equivalents
- Not as aggressive correction as Pinnacle Maxx for flat feet
- The signature ‘heel cup feel’ takes 1-2 weeks to adapt to
Dr. Tom’s Recommendation: If you’re a cyclist with foot numbness, hot spots, or knee pain — this is the orthotic. The stabilizer cap solves cycling-specific biomechanical issues that no other orthotic addresses. Worth the premium for athletes.
None of these solving your foot pain?
Some patients (about 30%) need custom-molded prescription orthotics. We make 3D-scanned custom orthotics in our Howell and Bloomfield Hills offices — specifically built for your foot mechanics.
Schedule a Custom Orthotic Fitting →FSA/HSA eligible · Most insurance accepted · (810) 206-1402
Frequently Asked Questions
Podiatrist-Recommended Products
These are the products Dr. Tom recommends most often in his clinic at Balance Foot & Ankle for lasting foot pain relief:
- PowerStep Pinnacle Arch Support Insoles — #1 clinic recommendation for arch support and heel pain relief
- Doctor Hoy’s Natural Pain Relief Gel — Fast-acting topical relief used and trusted by podiatrists
- CURREX RunPro Insoles — Dynamic arch profile for active patients and runners
As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. These recommendations reflect genuine clinical use.
In-Office Treatment at Balance Foot & Ankle
If home treatment isn’t providing relief for your sesamoiditis, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.
Ready to Get Relief?
Same-day appointments available in Howell & Bloomfield Hills, MI
4.9★ | 1,123 Reviews | 3,000+ Surgeries
Or call: (810) 206-1402
Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) 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 made him one of the most-followed foot & ankle educators on YouTube.