Anterior interbody fusion device
First Claim
1. 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 pair of lateral spacers, each having opposite endplate faces adapted to contact each of the adjacent vertebrae when said lateral spacers are within the intradiscal space, and each having a side face defining a channel therein; and
a first central spacer having opposite faces oriented toward each of the adjacent vertebrae when said first central spacer is within the intradiscal space, and further having opposite ends, each of said opposite ends configured to be slidably received within said channel in a corresponding one of said lateral spacers,wherein said pair of lateral spacers and said first central spacer are sized for individual introduction into the intradiscal space for assembly within the intradiscal space with said opposite ends of said first central spacer engaged within said channel in said corresponding one of said lateral spacers.
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Accused Products
Abstract
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.
1202 Citations
18 Claims
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1. 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:
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a pair of lateral spacers, each having opposite endplate faces adapted to contact each of the adjacent vertebrae when said lateral spacers are within the intradiscal space, and each having a side face defining a channel therein; and a first central spacer having opposite faces oriented toward each of the adjacent vertebrae when said first central spacer is within the intradiscal space, and further having opposite ends, each of said opposite ends configured to be slidably received within said channel in a corresponding one of said lateral spacers, wherein said pair of lateral spacers and said first central spacer are sized for individual introduction into the intradiscal space for assembly within the intradiscal space with said opposite ends of said first central spacer engaged within said channel in said corresponding one of said lateral spacers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18)
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16. 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,
said device comprising: -
a pair of spreader rods, one for each of said pair of lateral spacers, each having means for engaging a respective one of said lateral spacers, and each sized to extend outside the patient when engaging said lateral spacers disposed within the intradiscal space; and means for manipulating said pair of spreader rods outside the patient to move said lateral spacers apart within the intradiscal space. - View Dependent Claims (17)
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Specification