Patent ID: 9693871
Date: 2017-07-04
CPC Classifications: A61B,A61F

Claim:
1. A vertebral implant ( 1 ) intended to be implanted in an 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 locking portion integral with the screw ( 10 ) and a female lock portion formed by the walls ( 72 ) of the well ( 7 ), said male locking portion and female lock portion 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 locking portion and female lock portion until reaching a final locking position of the screw ( 10 ) in which the male locking portion and female lock portion are mutually released, the male locking portion in the final locking position mating with the female lock portion to be locked in position by the female lock portion, said screw ( 10 ) comprising at least a head ( 11 ) and a main body ( 20 ), said female lock portion being fixed and said male locking portion 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 locking portion and female lock portion.