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    SURFACE BY DESIGN™

 
  • Provides immediate stability with surface features designed for significant friction to help prevent motion
  • Encourages bone cell proliferation with roughened titanium surface1,2
  • Promotes “mechanical fusion” bone ingrowth for short-term stability, using trabecular, bone-like surface design, with an average pore diameter of 500µm
 
 Macro lense photography 14x and 21x magnification

Macro lense photography 14x and 21x magnification

 SEM Analysis: 1000, 20,000, 40,000 and 60,000x Magnification

SEM Analysis: 1000, 20,000, 40,000 and 60,000x Magnification

OPEN ARCHITECTURE
ARCHED DESIGN

 
  • Spira™’s open architecture, arched design has large openings for significant graft packing. It decreases the risk of subsidence due to the design’s “snowshoe effect” and provides good visibility for fusion. 

  • Newly-forming bone grows onto and through the multiple roughened titanium arches to achieve maximum stability and complete endplate-to-endplate arthrodesis.

  • The implant enables easy insertion with a smooth leading edge and pockets that interlock with the inserter to provide rotational stability.

  • The arched design enables a distribution of load and stress throughout the cage, which is known from Wolff’s law to enhance fusion, and protects fusion zones from stress.