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Coplanar straightening system

A slender, component-based technology for spinal manipulations that addresses issues such as the complexity of spinal rod placement

Active Publication Date: 2014-04-16
WARSAW ORTHOPEDIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, when pedicle screws are anchored into a scoliotic spine, the screws follow the curvature of the spine and tend to tilt in the transverse plane in response to vertebral rotation, thereby complicating the placement of spinal rods

Method used

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Embodiment Construction

[0044] To promote an understanding of the principles of the invention, reference will now be made to the embodiments shown in the drawings and specific expressions are used to describe these embodiments. It should be understood, however, that no limitation of the scope of the invention is thereby intended. Any such alterations and further modifications of the devices described herein, and consideration of such further applications of the principles of the invention described herein, will be within the purview of those skilled in the art to which the invention pertains.

[0045] refer to figure 1 and 2 , showing a scoliotic spine containing multiple vertebrae V. In a scoliotic vertebra, the natural position and alignment of its vertebra V is altered by abnormal vertebral rotation (shown by arrow R) and abnormal vertebral translation (shown by arrow T). Thus, the anterior-posterior axes A-P of the vertebrae V, whose normal positions lie within the common plane P (ie, the long...

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PUM

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Abstract

A bone anchor assembly is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor assembly includes a bone anchor, a receiver mounted to the bone anchor, a saddle within the receiver, a spacer within the receiver, and an engaging member. The receiver extends along a central longitudinal axis proximally away from the bone anchor. A rod or other elongated connecting element is received in a passage of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle, which engages the saddle against the spacer, which in turn engages the proximal head of the bone anchor in the receiver. The orientation of the saddle in the receiver is adjustable to correspond to the orientation of the connecting element relative to the central longitudinal axis of the receiver.

Description

technical field [0001] The present invention relates generally to the treatment of the spine, and more particularly to apparatus and methods for reducing spinal deformities, including but not limited to scoliotic deformities. Background technique [0002] Normal spinal anatomy shows distinct alignment and rotation characteristics along the 3 spatial planes. In the coronal (or anterior) plane, the vertebrae are generally aligned and not rotated. In the transverse plane (or axial plane), the vertebrae are also generally aligned and moderately rotated. In the longitudinal plane, the vertebrae have a degree of rotation and translation that creates the physiological curvature of the spine; ie, cervical curvature, dorsal or thoracic curvature kyphosis, and lumbar curvature. [0003] It is well known that there are various causes of vertebral deformation. Such deformations include abnormal spinal curvatures such as scoliosis, kyphosis, and / or other abnormal curvatures in which t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/70
CPCA61B17/7085A61B17/708A61B17/7076
Inventor G·P·维拉斯皮尔邱勇M·刘J·张
Owner WARSAW ORTHOPEDIC INC