Patent ID: 8012183

Claim:
A vertebral anchoring device comprising: a connecting rod ( 3 ); bone-anchoring screws ( 5 ) implantable in the vertebrae ( 4 ) of a vertebral column, the bone-anchoring screws each comprising a head ( 16 ); and connectors ( 2 ) linked to one another by the connecting rod ( 3 ) and fixed on the bone-anchoring screws ( 5 ), each connector ( 2 ) being composed of a connection element ( 6 ) that comprises receiving and fixing parts to permit immobilization of the connecting rod ( 3 ) in translation and in rotation, each connection element ( 6 ) further comprising, opposite the receiving and fixing parts, a seat ( 12 ) that cooperates with a connecting device ( 17 ) permitting assembly of the bone-anchoring screw ( 5 ), the connecting device ( 17 ), before immobilization of the connecting rod ( 3 ) in the connection element ( 6 ), permitting, i) lateral and independent tilting movements of the connection element ( 6 ) and of the bone-anchoring screw ( 5 ) relative to each other and, ii) rotation of the bone-anchoring screw ( 5 ) for fixing the bone-anchoring screw ( 5 ) in the body of the vertebra ( 4 ), wherein, the connecting device is composed of a bushing ( 17 ) that cooperates with the seat ( 12 ) of the connection element ( 6 ) and has first set of through-bores ( 15 , 19 ) which are formed respectively in the seat ( 12 ) and the bushing ( 17 ) and allow the bushing to tilt laterally about rotation pins ( 20 , 21 ), and second set of through-bores ( 22 , 25 ) which are formed respectively in the bushing ( 17 ) and the head ( 16 ) of the bone-anchoring screw ( 5 ) and allow the bone-anchoring screw ( 5 ) to tilt laterally about another rotation pin ( 26 ).