Screen Shot 2018-12-18 at 2.38.10 PM.png
 
 

SURFACE BY DESIGN®

  • Provides immediate stability with surface features designed for significant friction to help prevent motion

  • Encourages bone cell proliferation with roughened titanium surface 1,2

  • 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.

[1] Deligianni, D. D., et al. “Effect of surface roughness of the titanium alloy Ti–6Al–4V on human bone marrow cell response and on protein adsorption.” Biomaterials 22.11 (2001): 1241-1251.
[2] Martin, J. Y., et al. “Effect of titanium surface roughness on proliferation, differentiation, and protein synthesis of human osteoblast‐like cells (MG63).” Journal of biomedical materials research 29.3 (1995): 389-401.