Posterior Spine Stabilization

Posterior rods made from PEEK-OPTIMA™ polymers allow allow for fusions that are less stiff than traditional metal rods.

Posterior rods made from PEEK-OPTIMA™ polymers allow for fusions that are less stiff than traditional metal rods.

PEEK-OPTIMA Rods provide a semi-rigid fusion construct

PEEK-OPTIMA Natural features a modulus similar to human bone. As a result, posterior spinal rods made of biomaterial allow for less stiff, or semi-rigid fusion constructs. These constructs bridge the gap between traditional rigid titanium rod and screw constructs and constrained dynamic stabilization constructs.

  • Recent tests show that rods made of PEEK-OPTIMA Natural demonstrate a trend towards reduced motion and more natural kinematic loading at adjacent levels compared with titanium rods.
  • Biomechanical studies suggest that decreasing the stiffness of the rod construct can help reduce the stress at the bone-screw interface, which in turn may prevent screw loosening.
  • This improved load sharing, plus clear, artifact-free imaging for easy device placement and monitoring, are important advantages that PEEK-OPTIMA provides over all metals.
  • Invibio has developed a data package for customers featuring biomechanical test methods that aid understanding of notch sensitivity and provide manufacturing capabilities for curved rod components.