Additive Surgical has changed the way stress is distributed from vertebral body to cage through a dual modulus of elasticity.
The dual modulus interbody cages are engineered to have a lower modulus of elasticity on the cage surfaces allowing for the hard cortical shell of the spine to continue to be the stress-loading body rather than the cage, promoting bone growth and reducing the risk of stress shielding and subsidence. A harder modulus of elasticity is present in the internal lattice structure which more closely mimics the elasticity of bone, promoting osteoconduction, bone in-growth and capillarisation.
This design is an innovative, industry-leading design to ensure superior initial fixation, osteointegration and fusion whilst mitigating the risk of stress shielding and point loading. It addresses biomechanical concerns but also aims to reduce the risk of complications associated with rigid implants.
The project aims to compare the dual modulus design to single modulus cages in order to determine if the design is mechanically superior.
Michael Russo
Gibran Maher
