DynaNail® TTC Fusion Nail - In Bone
DynaNail® TTC Fusion Nail
DynaNail® TTC Fusion Nail - In Bone
DynaNail® TTC Fusion Nail
Enovis Foot & Ankle

DynaNail® TTC Fusion System

Sustained Dynamic Compression for TTC Fusions

DynaNail® Data

The DynaNail® TTC Fusion System is engineered specifically for tibiotalocalcaneal (TTC) fusions, addressing degenerative conditions, joint deformities, and revision procedures with unique technology that adapts to the body throughout the healing process.

Powered by Enovis™ patented pseudoelastic NiTiNOL technology, the DynaNail® TTC Fusion System provides up to 8mm of sustained dynamic compression, optimizing biomechanical stability while promoting higher fusion rates and faster time to fusion.1,2,3,4 Unlike static implants that lose compression over time, DynaNail® continuously responds to bone resorption, reducing the risk of nonunion and enhancing long-term outcomes.5,3

Learn more about the power of NiTiNOL.

Download the Surgical Technique Guide

TTC Fusion System
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The DynaNail® TTC Fusion System stands alone as the sole fusion method providing the compression performance of an external fixator within an intramedullary nail. Specifically engineered for TTC fusion procedures, it ensures higher compression and stability, setting a new standard in fusion technology.

Maintained Compression Without External Fixation? Nailed It

The DynaNail® TTC Fusion System is the only proven fusion approach that offers the compression performance of an external fixator inside an intramedullary nail.

  • Delivers up to 8mm of sustained dynamic compression, plus an additional 6mm of manual intra-operative compression1
  • Ensures automatic dynamization upon weight-bearing
  • Paired with the durable DynaFrame™ CF (Carbon Fiber) Deployment System
  • Available in a range of diameters and lengths, including 180mm, 220mm, 260mm, and 300mm

Demonstrated Elite Performance

The compression-sustaining DynaNail® TTC Fusion System is compatible with femoral head allografts, 3D-printed bulk spacers, and adjunctive fusion procedures like triple arthrodesis.

Non-Unions from Prior Arthrodesis

Images Courtesy of:
Dan Latt, MD, Tucson, AZ

x-ray - arthrodesis non union

Large Bony Defects - Absent Talus

Images Courtesy of:
Tom SanGiovanni, MD, Coral Gables, FL

x-ray - large boney defects

Charcot Foot

Images Courtesy of:
Jeffrey Covell, MD, Danville, KY

x-ray - Diabetics-Smokers - Charcot Example.jpg

Failed Total Ankle Replacement

Images Courtesy of:
Mark Conklin, Golden, CO

x-ray - failed total ankle

The Proof Is In The Science

Maintained Active Compression

Benchtop testing shows that the DynaNail® can maintain compression for up to 8mm of bone resorption or settling, similar to an external fixator.1 In contrast, existing static IM nails, including other internal compression nails, lose 90% of their compression when just 1 mm of bone resorption occurs.5,6

DynaNail Resorption Graph 1.jpg

Immediate Dynamization

Thanks to the axial compliance of its NiTiNOL compressive element, DynaNail® is able to transfer almost 70% of forces to the bone during weight-bearing; whereas, static competitor nails are only able to transfer 20% of walking forces.7

DN-Weightbearing-Stress-Model.jpg

MKT-FA26-0052 Rev A

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dynanail nitinol animation

DynaNail Animation

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DynaNail® TTC Patient Testimonial - Dave

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DynaNail® TTC Patient Testimonial - David

  1. Data on File. Enovis. 2026
  2. Pitz, MK (2011). Compression-Aided Stability of Orthopaedic Devices [Master’s Thesis]. Georgia Institute of Technology.
  3. Chundi G, Dawar A, Ahn DB, et al. Use of Sustained Compression to Mitigate Nonunion in Tibiotalocalcaneal Arthrodesis: A Propensity Score-Matched Nationwide Readmissions Database Analysis. J Am Acad Orthop Surg, 2025. doi:10.5435/JAAOS-D-25-00011.
  4. Steele JR, Kildow BJ, Cunningham DJ, Dekker TJ, DeOrio JK, Easley ME, Nunley JA, Parekh SG, Adams SB. Comparison of Tibiotalocalcaneal Arthrodeses Using Sustained Dynamic Compression Nail Versus Nondynamized Nails. Foot Ankle Spec, 2020; (13)3: 193-200.
  5. Hsu AR, Ellington JK, Adams SB, Jr. Tibiotalocalcaneal Arthrodesis Using a NiTiNOL Intramedullary Hindfoot Nail. Foot Ankle Spec 2015; 8(5): 389-96.
  6. Yakacki CM, Gall K, Dirschl DR, Pacaccio DJ. Pseudoelastic intramedullary nailing for tibio-talo-calcaneal arthrodesis. Expert Rev Med Devices 2011; 8(2): 159-66.
  7. Terrill, P et al. Effect of intramedullary nail stiffness on load-sharing in tibiotalocalcaneal arthrodesis: A patient-specific finite element study. PLOS ONE 18(11): e0288049. https://doi.org/10.1371/journal.pone.0288049.