Intersomatic vertebral cage

Details Intersomatic vertebral cage Intersomatic vertebral cage

1995-01-23

1996-09-10

Willse, David H.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

606 61, 411 55, A61F 244

Patent

active

055541917

ABSTRACT:
An intersomatic cage to be inserted from the posterior approach between two vertebrae comprises two substantially parallel branches for contact with the vertebral bodies, a linking portion linking the posterior ends of the branches, and a movable spreader member for angularly spreading the two branches after insertion of the cage between the two vertebrae. The cage allows adjustment of the lordosis angle between the two vertebrae during surgery. Ancillary equipment for insertion of the cage includes a rasp for forming a housing for the cage between the two vertebrae, a cage-holder for inserting the cage into the housing, a screwdriver for turning a screw screwed into the spreader member to spread the two branches of the cage, and a guide for successively guiding the rasp, the cage-holder with the cage, and subsequently the screwdriver.

REFERENCES:
patent: 3765296 (1973-10-01), Fischer
patent: 3941028 (1976-03-01), Lobello et al.
patent: 4091806 (1978-05-01), Aginsky
patent: 4834757 (1989-05-01), Brantigan
patent: 4863476 (1989-09-01), Shepperd
patent: 5092891 (1992-03-01), Kummer et al.
patent: 5094577 (1992-03-01), Clark et al.
patent: 5360450 (1994-11-01), Giannini
European Patent Application No. 88308375.0 Published Mar. 15, 1989.
International Application Publication No. WO89/12431 International Publication Date: Dec. 28, 1989 International Application No. PCT/US89/02526 filed Jun. 13, 1989.
International Application Publication No. WO 92/14423 International Publication Date Sep. 3, 1992 International Application No. PCT/US92/01397 filed Feb. 21, 1992.

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