Total Ankle Arthroplasty: STAR, INFINITY, and SALTO Talaris Implant Comparison

Quick answer: Total Ankle Arthroplasty Implant Comparison Star Infinity Salto is a common foot/ankle topic that affects many patients. Effective treatment starts with a targeted diagnosis, conservative-first treatment, and escalation only when needed. We treat this regularly at our Howell and Bloomfield Township practices. Call (810) 206-1402.

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

Total ankle arthroplasty (TAR) has undergone a notable transformation over the past two decades. First- and second-generation designs with high failure rates have given way to third-generation implants with survivorship data approaching 80–85% at 10 years in favorable candidates. Three implant systems dominate the U.S. market: the Scandinavian Total Ankle Replacement (STAR), the INFINITY Total Ankle System, and the SALTO Talaris Total Ankle Prosthesis. Each represents a distinct design philosophy, with specific advantages, limitations, and optimal patient populations.

Design Principles: Mobile Bearing vs. Fixed Bearing

The fundamental design distinction is mobile-bearing versus fixed-bearing polyethylene. The STAR is the prototype mobile-bearing design: three components (tibial tray, talar component, and a free-floating polyethylene insert) allow the poly insert to rotate and translate between the metal components, reducing polyethylene stress through load distribution. Fixed-bearing designs (INFINITY, SALTO Talaris) bond the polyethylene to the tibial tray, simplifying implantation and eliminating the risk of poly bearing dislocation at the cost of higher constraint forces on the bone-implant interface. The theoretical advantage of mobile-bearing designs in reducing polyethylene wear has not translated into demonstrably superior long-term survivorship in comparative studies, while fixed-bearing designs have demonstrated advantages in surgical reproducibility and revision options.

STAR: Long-Term Data and Ligament Requirements

The STAR has the longest U.S. outcome data among three-component systems following FDA approval in 2009 (with European data extending back to the 1980s). It requires intact collateral ligaments to function — the mobile bearing depends on ligamentous constraint for stability, and STAR implantation in ankles with chronic ligamentous insufficiency produces early bearing dislocation. Reported 10-year survivorship ranges from 70–90% in experienced centers. INFINITY (Wright Medical): a fixed-bearing design with flat-on-flat tibiotalar contact geometry, sulcus talar component geometry, and hydroxyapatite-coated ingrowth surfaces. U.S. registry data and peer-reviewed series report 85–90% survivorship at 5 years. Its surgical technique emphasizes reproducible tibial cut alignment through an extramedullary cutting guide. SALTO Talaris (Integra): fixed-bearing design derived from the European SALTO mobile-bearing prosthesis, modified for the U.S. market. Anatomical talar component geometry designed to reproduce normal talus kinematics. Reported 5-year survivorship of approximately 90% in recent series. Dr. Biernacki at Balance Foot & Ankle evaluates advanced ankle arthritis with weight-bearing CT and comprehensive clinical assessment, discussing total ankle arthroplasty and arthrodesis options individualized to each patient’s deformity, activity level, and anatomy. Call (810) 206-1402.

When to See a Podiatrist

Many foot conditions can be managed conservatively at home, but some require professional evaluation. See a podiatrist promptly if you experience:

• Pain that persists for more than 2 weeks despite rest
• Swelling, redness, or warmth that isn’t improving
• Numbness, tingling, or burning in the feet
• A wound or sore that is not healing within 2 weeks
• Any foot concern if you have diabetes or poor circulation
• Nail changes that suggest fungal infection or other problems

At Balance Foot & Ankle, our three board-certified podiatrists — Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin — provide comprehensive foot and ankle care at our Howell and Bloomfield Township offices. Most insurance plans are accepted.

In-Office Treatment at Balance Foot & Ankle

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

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.