Intervertebral disc prosthesis

摘要

The invention relates to an intervertebral disc prosthesis comprising at least two plates, namely first and second plates, articulated about each other by means of a curved surface, namely articulation, of at least one of the plates, each of the plates comprising a surface known as a contact surface, intended to be in contact with a vertebral plate of one of the vertebrae between which the prosthesis is intended to be inserted, this contact surface for each of the plates comprising a geometrical centre at equal distance from at least two diametrically opposite points located on the periphery of the plate, in which the geometric centres of the plates are not vertically aligned, this off-setting of the geometrical centres of the plates engendering an off-setting of the edges of the plates in at least one direction perpendicular to the vertical axis of the spinal column.

主权项

1. An intervertebral device comprising:
a first side having a plate-like surface configured for contacting a first vertebra; a second side having a plate-like surface configured for contacting a second vertebra; a first end configured to facilitate insertion of the device into the space between the first and second vertebrae; a second end located on the opposite side of the device from the first end; and a first generally rectangular opening extending angularly through at least one of the plate-like surfaces along the second end and comprising
a top wall, a bottom wall, and a pair of lateral side walls spaced apart to house a first plate-like anchor with the top surface of the first plate-like anchor adjacent to the top wall, the bottom surface of the first plate-like anchor adjacent to the bottom wall, and lateral side surfaces of the first plate-like anchor adjacent to respect ones of the lateral side walls,a sloping section configured to receive the first plate-like anchor, to guide the first plate-like anchor during insertion of the first plate-like anchor into a vertebra, and to set the angle of the first plate-like anchor with respect to one of the first and second sides of the device, anda limit stop disposed on at least one of the lateral side walls configured to engage a locking tab disposed on a lateral side surface of the first plate-like anchor and lock the anchor against the device.