Chronic Ankle Instability Brostrom Repair 2026

Ligament	Function	Injury Rate in Ankle Sprains	Clinical Test	Role in Instability
ATFL (Anterior Talofibular)	Resists anterior talar translation; primary plantarflexion stabilizer	Torn in ~70% of sprains	Anterior drawer test	Primary target in modified Brostrom repair
CFL (Calcaneofibular)	Resists subtalar inversion in dorsiflexion	Torn in 50–75% of ATFL tears	Talar tilt test	Repaired with ATFL in combined instability
PTFL (Posterior Talofibular)	Resists posterior talar translation; strongest lateral ligament	Torn in <10% of sprains	Posterior drawer test	Rarely addressed; strong even in severe sprains
Deltoid Complex (medial)	Resists eversion and external rotation	High-energy sprains; Stage IV flatfoot	Eversion stress test	Separate medial repair if concomitant medial instability

Treatment	Indication	Success Rate	Return to Sport	Key Notes
Functional Rehab (PT + Proprioception)	First-episode instability; acute sprain	85% return to sport without recurrence	4–8 weeks	Peroneal strengthening + balance training; first-line always
Lace-Up / Semi-Rigid Ankle Brace	Recurrent sprains; in-season athlete; postoperative	Reduces re-sprain risk by 50–70%	Immediate with brace	Does not substitute for rehab; reduces re-injury rate
Modified Brostrom Procedure	Chronic instability; failed 3–6 months PT	85–95% good-to-excellent	4–6 months	Anatomic ATFL + CFL repair directly to fibula; IER augmentation
Brostrom + Gould Modification	Severe laxity; hypermobility; high-demand athletes	90–95%	4–6 months	Extensor retinaculum reinforcement; reduces failure risk
Allograft / Chrisman-Snook Tenodesis	Revision; failed prior Brostrom; insufficient tissue	75–85%	6–9 months	Peroneus brevis or allograft reconstruction; non-anatomic
Arthroscopic Brostrom	Chronic instability without severe laxity	85–90%; comparable to open	3–4 months (faster)	Smaller incision; faster rehab; growing evidence base

Chronic ankle instability (CAI) is the persistent sense of ankle giving way, repeated sprains, pain, and functional limitation that develops in approximately 20–40% of patients after an initial ankle sprain. When lateral ankle ligaments — primarily the anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) — heal with stretching or scarring rather than anatomical restoration, the ankle becomes mechanically lax and susceptible to recurrent inversion injuries.

At Balance Foot & Ankle PLLC in Howell, Michigan, Dr. Tom Biernacki evaluates and treats chronic ankle instability with a systematic approach: confirming the diagnosis with clinical testing and imaging, optimizing conservative management with physical therapy and bracing, and performing surgical Broström ligament repair for patients who have exhausted non-operative options and continue to have functional instability limiting their activities.

Anatomy of Lateral Ankle Ligaments

The lateral ankle complex consists of three ligaments. The anterior talofibular ligament (ATFL) is the weakest and most commonly torn — it limits anterior translation and internal rotation of the talus. The calcaneofibular ligament (CFL) crosses the subtalar joint and limits inversion at both the ankle and subtalar joints. The posterior talofibular ligament (PTFL) is rarely injured. The ATFL is injured in approximately 65% of ankle sprains; combined ATFL and CFL tears occur in more severe inversion injuries.

Diagnosis of Chronic Ankle Instability

Clinical diagnosis relies on history (repeated ankle sprains, perceived giving way, activity-related pain) and physical examination. The anterior drawer test assesses ATFL laxity by applying anterior force to the foot while stabilizing the tibia — a positive test shows excessive anterior translation of the talus. The talar tilt test evaluates CFL integrity. Stress X-rays quantify laxity objectively when clinical findings are equivocal. MRI assesses the structural integrity of the ATFL and CFL and identifies associated pathology — particularly peroneal tendon tears, osteochondral defects of the talus, and anterior ankle impingement — that coexist with instability in a significant percentage of patients.

Conservative Management of CAI

Physical therapy is the cornerstone of conservative CAI management. A structured neuromuscular training program targeting peroneal muscle strength, proprioception, and single-limb balance significantly reduces the frequency and severity of giving-way episodes. The Bergen protocol and similar balance training programs have Level I evidence supporting their efficacy for functional instability. Custom orthotic therapy with lateral hindfoot posting reduces inversion stress during gait. Ankle bracing — lace-up stabilizers (ASO, McDavid) during high-risk activities — is a practical adjunct for patients who need protection during athletic participation.

Conservative management is successful in approximately 60–70% of patients with CAI when implemented consistently over 3–6 months. Patients who fail this approach, who have MRI-confirmed ligament tears with persistent structural laxity, or who cannot participate in high-risk activities without recurrent giving way are candidates for surgical lateral ankle stabilization.

Broström-Gould Lateral Ankle Ligament Repair

The modified Broström-Gould procedure is the gold standard surgical treatment for chronic lateral ankle instability. The procedure involves direct anatomical repair of the attenuated ATFL and CFL — imbrication (folding and tightening) of the stretched ligament tissue using non-absorbable sutures — reinforced by augmentation with the extensor retinaculum (Gould modification). This augmentation adds a second layer of strong fibrous tissue over the primary repair, improving initial strength and long-term durability.

The procedure is performed through a J-shaped incision anterior to the lateral malleolus, typically under regional or general anesthesia as an outpatient surgery. Associated pathology — peroneal tendon tears, osteochondral defects, anterior ankle impingement — is addressed simultaneously via ankle arthroscopy prior to the open repair. Recovery involves 4–6 weeks of non-weight-bearing in a short leg cast, followed by progressive rehabilitation over 4–6 months. Return to sport is typically at 5–6 months post-operatively. Long-term outcomes for the modified Broström are excellent, with success rates of 85–95% for returning patients to their pre-injury activity level without further instability. Call Balance Foot & Ankle at (517) 315-6969 for a chronic ankle instability evaluation in Howell, Michigan.

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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.

Visit Balance Foot & Ankle — Same-Day Appointments Available

Our podiatry team serves patients throughout Michigan including Howell, Brighton, and Bloomfield Hills. If you’re dealing with heel pain, ingrown toenails, or a foot injury, we have same-day appointment availability.