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Threaded titanium cages for lumbar interbody fusions

C D Ray1

  • 1Spinal Research & Education Foundation, Norfolk, Virgina, USA.

Spine
|March 15, 1997
PubMed
Summary
This summary is machine-generated.

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A new titanium fusion cage offers a safe and effective method for lumbar spine fusion, achieving high fusion rates and significant clinical improvement with minimal complications. This innovative approach supports solid interbody fusions in patients with severe back pain.

Area of Science:

  • Spine surgery
  • Orthopedic implants
  • Biomaterials

Background:

  • Interbody fusions offer mechanical advantages over other spinal fusion techniques.
  • Autologous cancellous bone is the preferred graft but requires mechanical support for space maintenance.
  • Previous methods aimed to maintain graft integrity during fusion.

Purpose of the Study:

  • To evaluate the safety and effectiveness of a novel hollow, threaded titanium fusion cage for lumbar interbody fusion.
  • To assess fusion success rates and clinical outcomes in a prospective, multicenter study.

Main Methods:

  • A prospective, multicenter study involving 236 cases under an FDA Investigational Device Exemption protocol.
  • Titanium cages packed with autologous cancellous bone were implanted in threaded intradiscal holes.

Related Experiment Videos

  • Fusion success was assessed via radiographic criteria (motion, bone halo, bone maintenance) and clinical outcomes.

    • Main Results:

    • High fusion rates were observed: 91% in a pilot study and 96% in the main Investigational Device Exemption study.
    • Significant clinical improvement was reported, with 65% of patients achieving excellent or good results on the Prolo scale.
    • Complications were rare and generally minor, with less than 1% experiencing persistent issues beyond hospitalization.

    Conclusions:

    • The titanium fusion cage is an effective, rapid, and safe method for lumbar spine fusion.
    • The procedure demonstrates a high fusion rate and successful clinical outcomes.
    • The use of this implant is associated with rare serious or permanent complications.