Patent ID: 8246653

Claim:
A device ( 9 ) for lateral stabilization of the spine, in use intended to reproduce an articulating intervertebral link joint, said device comprising: four vertebral elements ( 10 , 20 , 10 ′, 20 ′), i) a left-hand pair of said vertebral elements ( 10 , 20 ) in use to be attached on a left side of two adjacent vertebrae ( 1 , 2 ) by bone anchoring screws, ii) a right-hand pair of said vertebral elements ( 10 ′, 20 ′) in use to be implanted on a right side of the two adjacent vertebrae ( 1 , 2 ) by the bone anchoring screws, the left-hand pair of said vertebral elements ( 10 , 20 ) including i) an upper vertebral element ( 10 ) in use implanted in a region of an upper one of the two adjacent vertebra ( 1 ), and ii) a lower vertebral elements ( 20 ) in use implanted in a region of a lower one of the two adjacent vertebra ( 2 ), the right-hand pair of said vertebral elements ( 10 ′, 20 ′) including i) an upper vertebral element ( 10 ′) in use implanted in a region of an upper one of the two adjacent vertebra ( 1 ), and ii) a lower vertebral element ( 20 ′) in use implanted in a region of a lower one of the two adjacent vertebra ( 2 ), the left-hand pair of said vertebral elements ( 10 , 20 ) and the right-hand pair of said vertebral elements ( 10 ′, 20 ′), in use implanted in a symmetrical manner relative to a sagittal plane of the spine, corresponding to a longitudinal direction ( 4 ) of the spine, a pair of lower guide elements ( 24 , 24 ′), one of the lower guide elements integrally connected respectively to each of the left-hand and right-hand lower vertebral elements ( 20 , 20 ′) to define left-hand and right-hand lower bodies ( 21 , 21 ′); a pair of upper guide elements ( 14 , 14 ′), one of the upper guide elements integrally connected respectively to each of the left-hand and right-hand upper vertebral elements ( 10 , 10 ′) to define left-hand and right-hand upper bodies ( 11 , 11 ′), connecting elements ( 26 , 30 , 32 ) arranged so that in use each upper guide element is connected with a corresponding lower guide element, with each upper guide element laterally covering the corresponding lower guide element, so as to extend generally along a same lateral side of the bodies of the vertebrae and to press and slide against surfaces of each other so that these surfaces define a center of rotation (C) located in a intervertebral disc space between the two adjacent vertebrae, the left-hand and right-hand lower bodies ( 21 , 21 ′) and the corresponding left-hand and right-hand upper bodies ( 11 , 11 ′) rotatable relative to the other about the center of rotation (C).