| 摘要 |
A three-dimensional correction of the curvatures of the spine, for reducing spinal deformities, such as scoliosis, uses a pair of pedicle screws placed on each of the spinal vertebrae of the spine to be corrected, in combination with alignment elongated members or extenders temporally fixed by a proximate portion and associated with corrective rods engaged with the extenders, running along a transverse plane. Each of the corrective rods provides implant rods. |
| 主权项 |
1. A system for a global three-dimensional correction of the curvatures of the spine, comprising for each of a plurality of vertebrae of a section of the spine to be corrected:
a first bone anchoring element configured to be anchored into a vertebra; and a second bone anchoring element configured to be anchored into said same vertebra,wherein:
each bone anchoring element comprises an axial part for insertion into the vertebra and a head; said head of said first and second bone anchoring elements comprise pivotally connected thereto a first receiving part and a second receiving part, respectively to which a first alignment elongate member and a second alignment elongate member extending along respective longitudinal axis is are temporally attached by a proximal portion thereof, respectively, each receiving part defines a housing; said first alignment elongated member attached to said first bone anchoring element comprises a first longitudinal transversal slot allowing insertion therethrough, for each of first elongated members in the plurality of vertebrae of a section of the spine to be corrected, of a first corrective rod, said first longitudinal slot connects with said housing and allows said first corrective rod to be displaced from the uppermost part of the first transversal slot to the bottom until reaching said housing of said receiving part to become there implanted and reduce the spinal deformity; said second alignment elongated member attached to said second bone anchoring element comprises a second longitudinal transversal slot allowing insertion therethrough, for each of second elongated members in the plurality of vertebrae of a section of the spine to be corrected, of a second corrective rod, said second longitudinal slot connects with said housing and allows said second corrective rod to be displaced from the uppermost part of the second transversal slot to the bottom until reaching said housing of said receiving part to become there implanted and reduce the spinal deformity; said first receiving part connected to said head of said first bone anchoring elements is pivotable in a single sagittal plane to allow for a correction of the convexity of the spine, occurring mainly in a transversal plane, by vertebral translation, by means of the arrangement of said first corrective rod in said housing of the first receiving part; said second receiving part connected to said head of said second bone anchoring element is pivotable in a transverse plane perpendicular to said sagittal plane, to allow for a correction of the concavity of the deformed spine occurring mainly in a sagittal plane as the second bone anchoring element follows said second corrective rod, and each elongate member is removed once respective corrective rods are implanted, thereby a change in the vertebral rotation occurs and produces a correction of the axial vertebral deformity and a tridimensional correction of the spine deformity |
