VERTEBRAL IMPLANT PROVIDED WITH A SELF-LOCKING AND UNLOCKING MEANS

摘要

The invention relates to a vertebral implant (1) intended to be implanted in a patients intersomatic space and comprising an intersomatic cage (2) and at least one fixing screw (10) intended to be screwed into the bony mass through a well (7) of said cage (2) to stabilize the position of said cage (2) within the intersomatic space, said implant (1) being characterized in that the well (7) and the screw (10) form a system for the self-locking of the screw (10) in the well (7), said system comprising a male means secured to the screw (10) and a female means formed by the walls (72) of the well (7), the male means being locked in position by the female means.

主权项

1. A vertebral implant (1) intended to be implanted in the intersomatic space of a patient and comprising an intersomatic cage (2) and at least one fixing screw (10) intended to be screwed into the bony mass through a well (7) of said cage (2) to stabilize the position of said cage (2) within the intersomatic space, said implant (1) being characterized in that the well (7) and the screw (10) form a system for the self-locking of the screw (10) in the well (7), said system comprising a male means integral with the screw (10) and a female means formed by the walls (72) of the well (7), said male and female means being mounted with a relative flexibility allowing, during the screwing of the screw (10) into the bony mass through the well (7), a progressive and mutual stressing of the male and female means until reaching a final locking position of the screw (10) in which the male and female means are mutually released, the male means being locked in position by the female means, said screw (10) comprising at least a head (11) and a main body (20), said female means being fixed and said male means being mobile and including a retractable system for modifying the circumference of said head (11) allowing, during the screwing, the relative flexibility between said male and female means.