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Duo™ Ti Expandable Interbody Fusion System

The Duo Ti system represents the latest advancements in lateral interbody fusion technology. The system minimizes the amount and duration of retraction on the neural structures and surrounding soft tissues, both of which have been linked to neurologic deficits following lateral interbody fusion surgery.1, 2

The Duo Ti Implant is the first of its kind, combining Spineology’s proprietary mesh technology with porous Ti Blocks. Upon insertion, the Ti Blocks generate distractive forces capable of restoring disc height, spinal alignment, and providing indirect decompression. After insertion, the mesh component is filled with bone to create a large, endplate conforming, load sharing graft pack to reduce the risk of subsidence and help maintain correction. The material combination of mesh and porous Ti support early bony ingrowth and fusion over the entire surface area of the implant.3,4

 

Retraction With The Duo Ti Portal Tube Ends Where Traditional Retractors Begins

The Duo™ Ti Expandable Interbody Fusion implant enters the disc space through a small, intuitive portal tube, enabling surgeons to minimize retraction requirements, avoid and protect neural structures, and enhance surgical efficiency.

  • Reduced retraction requirements by up to 60%, compared to traditional bladed lateral retractors
  • Duo Ti Portal Tube is positioned farther from the posterior neural elements
  • Neural elements and psoas muscle remain protected throughout the procedure

 

Large, Endplate-Conforming Footprint

The Duo Ti implant is filled with granular bone graft, expanding the mesh component in all directions to create a large, endplate conforming, load sharing graft pack to reduce the risk of subsidence and help maintain correction.

70% more load-sharing surface area compared to a traditional 22 mm wide lateral cage.3

Note: Pressure film testing was completed with a 12 mm wide Duo PEEK implant, not the 16 mm wide Duo Ti implant.

 

Porosity

The material combination of mesh and porous Ti provide an optimal environment to support bony ingrowth and fusion over the entire surface area of the implant.3,4

 

 

  • Ti Blocks are 60% porous with an average pore size of 523-microns to provide an optimal environment for bony ingrowth and a functional fusion4
  • Mesh component has a 1500-micron pore size to facilitate graft containment while allowing bony through-growth3
  • Granular bone graft creates interconnected, interstitial spaces throughout the graft pack, providing an osteoconductive scaffold to support fusion3

 

 

Anatomy Restoration

The Ti Blocks generate distractive forces capable of restoring disc height, spinal alignment, and provide indirect decompression. After insertion, the mesh component is filled with bone to create a large, endplate conforming, load sharing graft pack to reduce the risk of subsidence and help maintain correction.

 

RaDical Study

The Spineology RaDical Study is being conducted to assess short-term and long-term outcomes in patients treated with the Duo System. This prospective, multi-site evaluation of 200 patients is Institutional Review Board (IRB)-approved and captures both subjective and objective patient data in a real-world, adult population. To view the latest data from the RaDical Post-Market Study, click here.

The Duo Ti system is utilized during lateral lumbar interbody fusion (LLIF) procedures. See Duo Ti Clinical Page for more information.

 

References:

[1] Aichmair A, Lykissas MG, Girardi FP, et al. An institutional six-year trend analysis of the neurological outcome after lateral lumbar Interbody fusion. Spine 2013;38:E1483-E1490.

[2] Rodgers WB, Gerber EJ, Patterson J. Intraoperative and early postoperative complications in extreme lateral interbody fusion. Spine 2010;36:26-33. 

[3] Data on file.

[4] Vassilis, K., Kaplan, D. Porosity of 3D biomaterials scaffolds and osteogenesis, Biomaterials 26 (2005) 5474-5491.