si joint implant See the product

The Catamaran® SI Joint Fusion System offers a novel, less invasive Inferior-Posterior approach to the SI joint using a single, robust titanium implant.

The System features the Catamaran® Fixation Device, which passes through both the axial and sagittal planes of the ilium and sacrum, transfixing the SI joint along its longitudinal axis.

A Better Option for SI Joint Fusion

si joint 3d view

Favorable Entry

Direct access to the SI joint provides optimal entry point to facilitate arthrodesis

si joint 3d view

Inferior-Posterior Approach

Trajectory is angled away from critical neural and vascular structures

si joint implant placement

Optimized Placement

Designed for maximum fixation in the dense cortical bone of the SI joint, inferior to the dorsal recess

si joint implant

Single, Robust
Titanium Implant

A single implant that transfixes the SI joint

  • Optimized surgical approach for SI joint fusion
  • A specifically designed titanium implant & delivery tools for surgery via a less invasive inferior-posterior approach
  • Designed to transfix the ilium and sacrum to stabilize the SI joint
  • Single implant surgery

The Catamaran SI Joint Fusion System is intended for sacroiliac joint fusion for conditions including sacroiliac joint disruptions and degenerative sacroiliitis

Utilizing a 2D fluoroimaging sequence, the Catamaran Fixation Device is implanted with one pontoon fixated into the ilium and the other into the sacrum, transfixing the SI joint along its longitudinal axis.

si joint 3d view si joint implant modified outlet view

MODIFIED OUTLET VIEW

Implant Trajectory

si joint implant si joint implant modified inlet view

MODIFIED INLET VIEW

Implant Entry

si joint implant si joint implant lateral view

LATERAL
VIEW

Implant Depth

Catamaran SI Joint Fixation Device:
Design & Specifications

Joined by a patented transfixing osteotome bridge, the implant consists of two hollow fenestrated pontoons with an open framework designed for packing with autologous bone to facilitate bony in-growth through the SI joint.

The transfixing osteotome is designed to disrupt the articular portion of the joint to help facilitate a fusion response.

si joint implant specifications

Catamaran Biomechanical Characterization and Testing

In mechanical testing, the Catamaran Fixation Device performed favorably as a reliable sacroiliac joint fixation/stabilization system that greatly exceeded the biomechanical thresholds of the sacroiliac joint.

See the evidence

White Paper PDF: Performance Integrity of the Catamaran SI Joint Fixation Device in a Novel, Inferior-Posterior Approach for Sacroiliac Joint Fusion

KNOWN TRAJECTORY
Standard and known entry point, trajectory, and angle that mimics SI joint injection. The surgical access pathway is angled away from critical neural and vascular structures.
FAVORABLE ENTRY POINT
Direct access to the SI joint provides an optimal entry point to facilitate arthrodesis.
OPTIMIZED PLACEMENT
The Catamaran® Fixation device is designed for maximum fixation in the dense cortical bone of the SI joint, avoiding the dorsal recess.
si joint implant placement animation
See the procedure
Catamaran Instructions for Use

Instructions for
Use (IFU)

Learn More
Catamaran Surgical Technique Manual

Surgical Technique
Manual

Learn More

If you would prefer a printed copy of any of these documents sent to you, please contact Tenon Customer Service at 1-844-211-2540.

A Single Center Experience with the
Catamaran SI Joint Fusion System

Early clinical experience has shown that the Catamaran® SI Joint Fixation Device via an inferior-posterior approach has the potential to deliver significant & sustained reduction in SI joint pain, as well as:

  • Minimal blood loss & fluoroscopy time
  • Reduced post-op pain
  • Rapid reduction in pain medications
  • Insertion pathway away from neural and vascular structures
significant reduction in si joint pain line graph
See the evidence

White Paper PDF: SACROILIAC JOINT FUSION: Improving Surgical Outcomes Through an Inferior-Posterior Approach with the Tenon Medical Catamaran SI Joint Fusion System

Stay Updated

To learn more about the Catamaran SI Joint Fusion System and discuss training opportunities, please complete the form below and a representative will contact you.