Spinal correction system and method

#The present disclosure generally relates to medical devices for the treatment of musculoskeletal disorders, and more particularly to a surgical system and method for correction of a spine disorder.

#Spinal pathologies and disorders such as scoliosis and other curvature abnormalities, kyphosis, degenerative disc disease, disc herniation, osteoporosis, spondylolisthesis, stenosis, tumor, and fracture may result from factors including trauma, disease and degenerative conditions caused by injury and aging. Spinal disorders typically result in symptoms including deformity, pain, nerve damage, and partial or complete loss of mobility.

#Non-surgical treatments, such as medication, rehabilitation and exercise can be effective, however, may fail to relieve the symptoms associated with these disorders. Surgical treatment of these spinal disorders includes correction, fusion, fixation, discectomy, laminectomy and implantable prosthetics. Correction treatments used for positioning and alignment may employ implants, such as vertebral rods, bone screws and sub-laminar wire, for stabilization of a treated section of a spine. This disclosure describes an improvement over these prior art technologies.

#The present disclosure will become more readily apparent from the specific description accompanied by the following drawings, in which:

#FIG. 1 is a plan view of one embodiment of components of a surgical system in accordance with the principles of the present disclosure disposed with vertebrae;

#FIG. 2 is a side sagittal view of the components and vertebrae shown in FIG. 1;

#The exemplary embodiments of a surgical system and related methods of use are discussed in terms of medical devices for the treatment of musculoskeletal disorders and more particularly, in terms of a surgical system and method for correction of a spine disorder. In some embodiments, the surgical system may be employed in applications for correction of deformities, such as scoliosis and kyphosis.

#In some embodiments, the surgical system includes a spinal implant, such as, for example, a tether on a convex side of a spine for constraining growth and a spinal implant, such as, for example, a longitudinal rod on a concave side of a spine to direct growth for correction of idiopathic scoliosis. In some embodiments, the surgical system includes a semi-rigid, longitudinal rod construct. In some embodiments, the longitudinal rod may include a thickness to provide more flexibility in one direction than in a second direction. In some embodiments, the longitudinal rod is configured to prevent lordosis in a sagittal plane of a thoracic spine. In some embodiments, the longitudinal rod is attached with a connector such that the longitudinal rod and connector interface is mostly rigid in a sagittal plane and flexible in a coronal plane to facilitate correction of a lateral deformity of the spine and maintain a selected sagittal curve. In some embodiments, the surgical system includes a longitudinal rod and connector construct configured to be rigid in the sagittal plane and facilitates rotation in the axial plane. In some embodiments, the longitudinal rod includes a selected curvature for a patient. In some embodiments, the surgical system includes a longitudinal rod configured to prevent rotation when disposed with a connector.

#In some embodiments, the surgical system includes a longitudinal rod having a non-circular cross-section, such as, for example, oblong or elliptical. In some embodiments, the surgical system includes a longitudinal rod that is flexible along a first dimension and rigid along a greater, second dimension. In some embodiments, the longitudinal rod does not rotate about itself when disposed with a connector. In some embodiments, the surgical system includes a bone fastener having a pivot mechanism.