Patent ID: 8226688

Claim:
A protection device for protecting adjacent stages Vc of a spinal segment Sr of a vertebral column instrumented by an osteosynthesis device ( 1 ) comprising connection rods ( 4 ), characterized in that the device is constituted of fixation elements ( 110 ) formed of connectors ( 111 ) immobilized in translation and in rotation on the corresponding connection rod ( 4 ) of osteosynthesis device ( 1 ), a support block ( 130 ; 180 ) presenting an inverted U-shaped profile and made of an elastic material in which is housed the spinous process Ve of superjacent vertebra Vc found just above the instrumented spinal segment Sr, at least one ligament ( 150 , 170 , 190 ) allowing spinous process Ve of superjacent vertebra Vc to be joined to support block ( 130 ; 180 ) and the support block ( 130 ; 180 ) to connectors ( 111 ) and a blocking means ( 118 , 123 ) of the corresponding ligament ( 150 , 170 , 190 ), after tensioning, in connectors ( 111 ); wherein each connector ( 111 ) comprises a lateral housing ( 112 ) with an inner cylindrical profile that is open to the outside to enable the introduction and snap insertion of the corresponding connection rod ( 4 ), tightening means ( 113 , 114 ) allowing the immobilization in translation and in rotation of each connector ( 111 ) on the corresponding connection rod ( 4 ) and grooves ( 115 , 116 ) cooperating with the blocking means ( 118 ) for holding an upper ( 150 ) ligament and a lower ( 170 ) ligament, and the grooves ( 115 , 116 ) lead to the inside of a cavity ( 117 ) arranged at the center of the connector ( 111 ) and inside of which cooperates, along a direction perpendicular to that of said grooves, a cam ( 118 ) allowing upper ( 150 ) and lower ( 170 ) ligaments to be tightened.