Zimmer Biomet and subsidiary Paragon 28 announced the launch of the Phantom curved TTC nail system, a next-gen device engineered around the true circular arc of hindfoot anatomy.

The Phantom nail system’s curved design following the anatomic arc extending from the posterior calcaneus through the subtalar joint, into the talus, and along the tibial metaphysis. This addresses the limitations of straight TTC nails, which rely on non-anatomic trajectories.

Traditional straight TTC nails rely on nonanatomic trajectories through curved structures. The Phantom TTC curved nail follows the physiologic arc, offering a number of clinical advantages, the companies said.

There’s no plantar incision needed, which addresses soft tissue disruptions and protects the plantar neurovascular bundle. The companies reported a 47.5% increase in calcaneal bone contact vs. straight nails.

Its built-in torsional stability is achieved through anatomic form-fit and threaded peg fixation across tibial, calcaneal, and subtalar segments. A revision-friendly trajectory can circumvent straight-nail tunnels and compromised cortical pathways.

The nail is compatible with both primary and revision TTC fusion surgeries, including complex Charcot reconstruction, post-traumatic cases, and failed straight-nail arthrodesis.

“The Phantom Curved TTC Nail System represents a meaningful advance in our commitment to developing procedure-specific solutions that reflect the real anatomy surgeons navigate every day,” said Albert DaCosta, Global President, Foot & Ankle, Zimmer Biomet. “By engineering a device around the natural circular arc of the hindfoot, we are helping surgeons achieve reproducible alignment, strong fixation, and thoughtful soft-tissue preservation for their most complex TTC fusion cases.”

Earlier this month, the company announced it had secured U.S. Food and Drug Administration (FDA) 510(k) clearance for its G7 acetabular system for primary and revision hip replacement surgeries.