Designed for alignment.
Built for motion.
The Phoenix™ Sinus Tarsi Stent System takes a fundamentally different approach to talotarsal instability — stabilizing the joint internally while preserving its natural motion, without fusing bone or removing tissue.
Stabilize the joint — don't sacrifice it
Many established options for talotarsal instability trade motion for stability. Fusion permanently joins bones together; other procedures may remove or permanently alter native tissue.
Phoenix™ is an extra-osseous stent placed at the sinus tarsi — outside the bone — to support the joint's alignment from within while it continues to move. The goal is stability that works with the foot's natural biomechanics, not against them.
Because Phoenix™ preserves native anatomy and can be removed if clinically necessary, it helps preserve future treatment options for the patient while being intended as a long-term solution.
Placeholder — final implant asset pending Six principles behind the platform
Motion preserving
Designed to stabilize the talotarsal joint while allowing it to move — not fusing or locking it in place.
Minimally invasive
Placed through a small incision at the sinus tarsi as an outpatient procedure.
Reversible by design
The implant can be removed if clinically necessary, preserving future options for the patient.
Preserves native anatomy
Works with the body’s existing structures rather than removing bone or permanently altering the joint.
Outpatient recovery
Typically performed on an outpatient basis, with recovery expectations set by the treating surgeon.
Evidence-informed
Built on the extra-osseous talotarsal stabilization (EOTTS) body of clinical literature.
Phoenix™ EOTTS vs. common alternatives
A high-level comparison of approaches to talotarsal joint instability. Individual candidacy always depends on a clinical evaluation.
| Consideration | Phoenix™ EOTTS | Arthroereisis | Fusion |
|---|---|---|---|
| Motion preserving | Yes | Yes | No |
| Minimally invasive | Yes | Yes | No |
| Reversible | Yes | Varies | No |
| Preserves native anatomy | Yes | Varies | No |
| Extra-osseous (outside bone) | Yes | Yes | No |
| Outpatient procedure | Typically | Typically | Varies |
General comparison for educational purposes only — not clinical guidance or a treatment recommendation. Final comparison content pending Astra review.
Built on the EOTTS body of literature
Extra-osseous talotarsal stabilization is supported by a growing library of peer-reviewed publications. Explore the clinical evidence, or review the technical resources built for surgeons.
Ready to take the next step?
Find a Phoenix-trained provider near you, or reach out to the Astra team to learn more.