Interbody spinal fusion implants

Details Interbody spinal fusion implants Interbody spinal fusion implants

A - Human Necessities

61

F

A61F 2/44 (2006.01)

Patent

CA 2224249

The present invention is directed to a variety of interbody spinal fusion implants having at least a partially frusto-conical configuration. The spinal fusion implants of the present invention may be relatively solid or hollow and may have surface roughenings to promote bone ingrowth and stability. The spinal fusion implants of the present invention may have wells extending into the material of the implant from the surface for the purpose of holding fusion promoting materials and to provide for areas of bone ingrowth fixation. A variety of surface irregularities may be employed to increase implant stability and implant surface area, and/or for the purpose of advancing the spinal fusion implant into the fusion site.

L'invention concerne plusieurs arthrodèses intersomatiques du rachis (220, 230 et 420), présentant au moins une configuration partiellement frusto-conique. Les arthrodèses (220, 230 et 420) selon l'invention peuvent être relativement pleines ou creuses et peuvent présenter des rugosités de surface afin de favoriser la repousse osseuse et la stabilité. Des trous (260) peuvent être ménagés dans ces arthrodèses (220, 230 et 420) et s'étendre dans le matériau de l'implant à partir de la surface afin de maintenir les matériaux favorisant la fusion et de constituer des zones de fixation de la repousse osseuse. Plusieurs irrégularités de surface peuvent être utilisées pour augmenter la stabilité de l'implant et sa surface, et/ou pour faciliter l'insertion de l'arthrodèse dans le site de fusion.

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