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US 5,397,364 AGranted
Anterior interbody fusion device
AssigneeDanek Medical, Inc.
InventorsJeffrey Kozak, Larry Boyd
Life of this patent
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AssigneeDanek Medical, Inc.
InventorsJeffrey Kozak, Larry Boyd
Estimating the term…
An interbody fusion device includes a pair of lateral spacers and a pair of central spacers, each sized for percutaneous introduction through a disc resection portal in the disc annulus. Each of the lateral spacers includes opposing side faces defining a channel therein, while each of the central spacers includes arms at their opposite ends configured to be received within a channel of a corresponding lateral spacer. The arms and channels are interlocking to prevent separation of the components once assembled within the intradiscal space. The assembly of the central and lateral spacers defines a cavity therebetween for insertion of bone graft material. The central and lateral spacers are configured so that the bone graft cavity is oriented over the weakest, but most vascular and biologically active, bone of the vertebral body, while the lateral spacers are situated adjacent the disc annulus and over the strongest vertebral bone.
An interbody fusion device configured for introduction into an intradiscal space defined by a disc annulus between two adjacent vertebrae, the intradiscal space defining a predetermined area relative to the adjacent vertebrae, the interbody fusion device comprising:
A device for introducing an interbody fusion device into an intradiscal space defined by a disc annulus between two adjacent vertebrae, in which the interbody fusion device includes a pair of lateral spacers adapted to contact each of the adjacent vertebrae and a central spacer for mating engagement with the central spacers within the intradiscal space, each of the pair of lateral spacers and central spacer sized for individual introduction into the intradiscal space for assembly therein,
Dependencies are inferred from the claim text.