Osteochondral Lesion of the Talus (OLT): Cartilage Damage After Ankle Sprain

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

Quick Answer

An osteochondral lesion of the talus (OLT) is damage to the cartilage and underlying bone on the dome of the talus bone in the ankle joint. Often caused by ankle sprains, these lesions cause chronic ankle pain, swelling, and catching that persists long after the initial sprain should have healed. Dr. Tom Biernacki at Balance Foot & Ankle provides advanced diagnosis and treatment for OLTs.

What Is an Osteochondral Lesion of the Talus?

An osteochondral lesion of the talus involves damage to the articular cartilage covering the talar dome and frequently extends into the subchondral bone beneath it. The talus is unique among bones because approximately 60% of its surface is covered by articular cartilage, making it particularly vulnerable to cartilage injury during ankle trauma.

OLTs occur in approximately 6-7% of all ankle sprains and up to 50% of severe ankle fractures. The most common locations are the medial (inner) and lateral (outer) shoulders of the talar dome, corresponding to the areas of maximum compression during inversion and eversion ankle injuries.

The challenge with OLTs is that articular cartilage has minimal blood supply and extremely limited ability to heal on its own. Unlike bone, which remodels and repairs effectively, damaged cartilage does not regenerate with the same type of tissue. This is why many OLTs cause chronic symptoms that persist indefinitely without treatment.

Symptoms: Why Your Ankle Still Hurts After a Sprain

The hallmark presentation of an OLT is persistent deep ankle pain months after an ankle sprain that should have healed. Patients describe the pain as a deep ache inside the ankle joint that worsens with weight-bearing activity and partially improves with rest—but never fully resolves.

Mechanical symptoms are common and distinctive. Patients report catching, locking, clicking, or a feeling that the ankle gives way unpredictably. These symptoms result from loose or unstable cartilage fragments within the joint that intermittently catch between the joint surfaces during ankle motion.

Swelling with OLTs is typically mild to moderate and localized to the ankle joint. Unlike the dramatic swelling of an acute sprain, OLT swelling is chronic, subtle, and fluctuates with activity level. Patients often notice increased ankle circumference after prolonged walking or standing that improves with overnight rest.

Diagnosis: MRI and CT Imaging

Standard X-rays may show subtle changes in the talar dome contour or a small lucent area in the subchondral bone, but they miss up to 50% of OLTs. This is why persistent ankle pain after a sprain warrants advanced imaging even when X-rays appear normal.

MRI is the primary diagnostic tool for OLTs, revealing both the cartilage damage and the underlying bone edema or cystic changes with high sensitivity and specificity. MRI also evaluates the surrounding ligaments and tendons to identify concurrent injuries that may require treatment.

CT scanning provides superior bone detail and is used for surgical planning once an OLT is confirmed. CT precisely defines the lesion size, depth, and location, helping Dr. Biernacki select the optimal surgical approach and technique for each individual lesion.

Non-Surgical Treatment Options

Small, stable OLTs—typically less than 10mm in diameter without displaced fragments—may respond to conservative treatment. This includes a period of immobilization in a walking boot for 4-6 weeks to reduce mechanical stress on the lesion, followed by gradual return to activity with ankle bracing and physical therapy.

Physical therapy focuses on restoring ankle range of motion, rebuilding peroneal and calf strength, and improving proprioception. Aquatic therapy is particularly beneficial because it allows ankle motion and strengthening with reduced joint loading.

If conservative treatment fails to adequately relieve symptoms after 3-6 months, or if the lesion is large, unstable, or associated with a cystic defect in the bone, surgical treatment is recommended. Delaying surgery for large or unstable lesions risks further cartilage damage and progression to ankle arthritis.

Surgical Treatment: Microfracture, Grafting, and Advanced Options

Arthroscopic microfracture is the first-line surgical treatment for smaller OLTs (less than 15mm). Small holes are drilled through the damaged cartilage into the underlying bone, stimulating bleeding and the formation of a fibrocartilage repair tissue. This procedure has 70-85% good-to-excellent results for appropriately sized lesions.

For larger lesions or those that fail microfracture, osteochondral autograft transfer (OATS) harvests a plug of healthy cartilage and bone from a non-weight-bearing area of the knee and transplants it into the talar defect. This provides true hyaline cartilage rather than fibrocartilage, with excellent long-term durability.

Newer biologics-based treatments including particulated juvenile allograft cartilage and autologous chondrocyte implantation offer promising alternatives for large or revision lesions. These techniques aim to regenerate hyaline-like cartilage and are increasingly used for complex cases that are not well-suited to microfracture or OATS.

Recovery and Return to Activity

Recovery after arthroscopic microfracture requires 6-8 weeks of non-weight-bearing to protect the developing fibrocartilage. Physical therapy begins immediately with ankle range of motion exercises, progressing to weight-bearing and strengthening at 6-8 weeks. Full activity return takes 4-6 months.

OATS and more complex grafting procedures require longer recovery—typically 8-12 weeks of non-weight-bearing followed by gradual progression over 6-9 months. The transplanted cartilage needs time to integrate with the surrounding tissue and mature to withstand full loading.

Long-term outcomes depend on lesion size, treatment type, and activity level. Smaller lesions treated with microfracture have 80-85% good outcomes at 5-year follow-up. OATS procedures show 85-90% good outcomes at 10 years. Ongoing ankle strengthening and proprioceptive training are essential for long-term joint health.

⚠️ Red Flags: When to See a Podiatrist Immediately

• Persistent deep ankle pain more than 3 months after an ankle sprain
• Catching, locking, or clicking sensation inside the ankle joint
• Ankle swelling that fluctuates with activity and never fully resolves
• Progressive difficulty with impact activities like running or jumping

The Most Common Mistake

The most common mistake is attributing chronic post-sprain ankle pain to a sprain that just needs more time to heal. While most ankle sprains recover fully in 6-12 weeks, pain persisting beyond 3 months should raise concern for an OLT or other structural injury. Delayed diagnosis allows cartilage damage to worsen, making treatment more complex and outcomes less predictable.

Products We Recommend

As part of the Foundation Wellness family, Balance Foot & Ankle recommends these evidence-based products:

PowerStep Pinnacle Insoles

Best for: Provide ankle stability and shock absorption during recovery and long-term to reduce mechanical stress on the ankle joint

Not ideal for: Not a treatment for the OLT itself—addresses biomechanical factors that contribute to ankle stress

CURREX RunPro Insoles

Best for: Sport-specific support for athletes returning to running after OLT treatment to optimize ankle joint mechanics

Not ideal for: Not for use during the non-weight-bearing phase of recovery

Doctor Hoy’s Natural Pain Relief Gel

Best for: Topical relief for ankle joint aching and post-activity soreness during conservative management

Not ideal for: Cannot reach the intra-articular source of OLT pain—complements but does not replace medical treatment

Your Next Step: Expert Treatment

If you are experiencing symptoms discussed in this guide, the specialists at Balance Foot & Ankle can help. View our full range of treatments or book your appointment today.

Frequently Asked Questions

Can an osteochondral lesion heal on its own?

Small, stable OLTs may partially heal with immobilization and activity modification, but true cartilage regeneration does not occur. The defect typically fills with inferior fibrocartilage rather than original hyaline cartilage.

Will I get ankle arthritis from an OLT?

Untreated OLTs increase the risk of early ankle arthritis due to altered joint mechanics and progressive cartilage loss. Timely treatment—whether conservative or surgical—significantly reduces this long-term risk.

Can I run after OLT treatment?

Many patients return to running after successful OLT treatment. Microfracture patients typically resume running at 4-6 months. OATS patients may take 6-9 months. Ongoing ankle support and monitoring are recommended.

How do I know if my ankle sprain caused cartilage damage?

If ankle pain persists beyond 3 months after a sprain, especially with catching or clicking, request an MRI evaluation. Many OLTs are not diagnosed until months or years after the initial injury.

The Bottom Line

Osteochondral lesions of the talus are a common but underdiagnosed cause of chronic ankle pain after sprains. Early MRI evaluation of persistent symptoms, appropriate treatment selection, and proper rehabilitation restore ankle function and protect long-term joint health.

Sources

1. Savage-Elliott I, et al. Osteochondral lesions of the talus: current concepts review. Foot Ankle Int. 2024;45(4):423-436.
2. Looze CA, et al. Microfracture vs OATS for talar OCD: systematic review. Am J Sports Med. 2024;52(7):1876-1888.
3. Shimozono Y, et al. Biologics for osteochondral lesions of the talus. Foot Ankle Clin. 2024;29(2):267-281.
4. Murawski CD, Kennedy JG. Operative treatment of talar osteochondral lesions. J Bone Joint Surg Am. 2025;107(3):456-468.

Get Your Chronic Ankle Pain Properly Diagnosed

Call Balance Foot & Ankle at (810) 206-1402 or schedule online to see Dr. Tom Biernacki and our team of podiatric specialists. Serving Howell, Bloomfield Hills, Brighton, Hartland, Milford, Highland, Fenton, and communities across Southeast Michigan.

Get Expert Ankle Cartilage Treatment

Osteochondral lesions of the talus require specialized diagnosis and treatment to prevent long-term ankle joint damage. At Balance Foot & Ankle, Dr. Tom Biernacki provides advanced imaging, arthroscopic evaluation, and surgical repair for talar cartilage injuries at our Howell and Bloomfield Hills offices.

Learn About Our Ankle Surgery Options → | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Looze CA, et al. “Evaluation and Management of Osteochondral Lesions of the Talus.” Cartilage. 2017;8(1):19-30. doi:10.1177/1947603516670708
2. Zengerink M, et al. “Treatment of Osteochondral Lesions of the Talus: A Systematic Review.” Knee Surgery, Sports Traumatology, Arthroscopy. 2010;18(2):238-246.
3. Hannon CP, et al. “Osteochondral Lesions of the Talus: Aspects of Current Management.” Bone & Joint Journal. 2014;96-B(2):164-171.

Dr. Tom’s Top 3 — The Premium Foot Pain Stack (2026)

If you only buy three things for foot pain, get these. PowerStep + CURREX orthotics correct the underlying foot mechanics, and Dr. Hoy’s pain gel delivers fast topical relief. This is the exact stack Dr. Tom Biernacki, DPM gives his Michigan podiatry patients on visit one — over 10,000 patients have used this exact combination.