Articulated vertebral body spacer

Details Articulated vertebral body spacer Articulated vertebral body spacer

1993-12-01

1996-07-09

Brittingham, Debra S.

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

Implantable prosthesis

Bone

606 61, A61F 244, A61B 1756

Patent

active

055340296

ABSTRACT:
An articulated vertebral body spacer is constituted by a pair of upper and lower joint pieces to be inserted between vertebras. The lower joint piece includes a convex portion formed on a central portion of its upper surface and having a convex sliding contact surface, and a stopper surface surrounding the convex portion. The upper joint piece includes a concave portion formed on a central portion of its lower surface and having a concave sliding contact surface which is sliding contact with the convex sliding contact surface, and an abutment surface which surrounds the concave portion and abuts against the stopper surface. A cavity for allowing the upper joint piece to pivot in accordance with forward/backward and bending motions of vertebral bodies to respective levels is formed between the abutment surface and the stopper surface.

REFERENCES:
patent: 4759766 (1988-07-01), Buettner-Jamz et al.
patent: 5071437 (1991-12-01), Steffee
patent: 5258031 (1993-11-01), Salib et al.
patent: 5360430 (1994-11-01), Lin

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