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Three board-certified podiatric surgeons. 950K+ YouTube subscribers. 1,123+ five-star reviews. Howell & Bloomfield Hills, Michigan.
Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle
Last reviewed: April 2026
Quick answer: Ankle ligament tears range from mild sprains (grade 1, stretching) to complete ruptures (grade 3). The ATFL is the most commonly torn ligament. Most tears heal with functional rehabilitation — surgery is reserved for complete tears failing conservative treatment.
Ankle Ligament Anatomy
The ankle is stabilized by three ligament complexes. The lateral (outer) complex is most commonly injured: ATFL (anterior talofibular ligament — the most frequently torn), CFL (calcaneofibular ligament), and PTFL (posterior talofibular ligament — rarely torn except in severe dislocations). The medial deltoid ligament complex stabilizes the inner ankle. The syndesmotic ligaments hold the tibia and fibula together above the ankle joint. Most ankle sprains (85%) involve the lateral complex.
Grading the Tear
Grade 1 — Ligament stretching, microscopic fiber disruption, no instability. Point tenderness, mild swelling. Weight-bearing with discomfort. Heals 1–2 weeks.
Grade 2 — Partial ligament tear. Moderate swelling, bruising, some instability on stress testing. Weight-bearing painful but possible. Heals 3–6 weeks with functional rehab.
Grade 3 — Complete ligament rupture. Significant swelling, bruising, instability. Often unable to bear weight initially. Treated conservatively in most cases; surgery for athletes or refractory cases. Heals 6–12 weeks with appropriate management.
Diagnosis
Clinical examination with anterior drawer test (ATFL integrity) and talar tilt test (CFL integrity) assesses ligament stability. MRI provides definitive imaging of ligament integrity — useful when clinical examination is inconclusive or when concomitant cartilage or tendon injury is suspected. Stress X-rays under fluoroscopy are used for surgical planning when significant instability is present. Ultrasound is a cost-effective dynamic assessment tool.
Frequently Asked Questions
Does a torn ankle ligament always need surgery? No. The vast majority of ankle ligament tears — including complete grade 3 tears — heal with functional conservative rehabilitation equivalent to surgical outcomes in non-elite athletes. The Brostrom ligament reconstruction is reserved for cases of chronic instability that have failed 3–6 months of appropriate conservative care.
How do I know if my ankle is sprained or fractured? The Ottawa Ankle Rules guide this assessment. An X-ray is indicated if there is bone tenderness at the posterior edge of the lateral or medial malleolus, or inability to bear weight for 4 steps. Clinical exam and patient history guide the initial decision — any significant ankle injury should be evaluated to rule out fracture.
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Same-day appointments in Howell & Bloomfield Hills, MI
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.
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)
- Hallux Valgus (Bunions): Evaluation and Management (PubMed)
- Bunions (Mayo Clinic)