INTERVERTEBRAL DEVICES

Abstract: the present invention relates to an intervertebral fusion device. the intervertebral fusion device comprises at least one endplate configured to be received in an intervertebral space defined between first and second vertebrae and a core component configured to engage with the at least one endplate when the at least one endplate is in the intervertebral space and the core component is inserted into the intervertebral space. the intervertebral fusion device also comprises first and second fingers and first and second recesses. a proximal end of each of the first and second fingers is attached to the endplate at or adjacent an anterior end of the endplate that first receives the core component when the core component is inserted into the intervertebral space. each of the first and second fingers extends in the direction of insertion of the core component towards a posterior end of the endplate and is unattached along its length except at its proximal end whereby the finger flexes along its length. the first and second fingers are spaced apart from each other in a transverse direction which is orthogonal to a direction of insertion of the core component and to a direction of separation of the first and second vertebrae. the first finger defines a first protrusion at a distal end thereof and the second finger defines a second protrusion at a distal end thereof, each protrusion protruding from the respective finger in the transverse direction. the core component defines the first and second recesses near a posterior end of the core component, the first and second recesses spaced apart from each other in the transverse direction. the core component bears against the first and second protrusions during a first stage of insertion to flex the first and second fingers in the transverse direction, and during a second stage of insertion after the first stage of insertion the first and second protrusions are received in the first and second recesses respectively and under spring bias exerted by the first and second fingers to thereby retain the core component relative to the endplate.

Inventor(s): Christopher REAH, Jonathan ARCOS, Nicholas SANDHAM, Frank HEUER

CPC Classification: A61F2/4455 ({for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages (intervertebral discs )})

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