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US 2006/0149244 A1Published application
Device for connecting a longitudinal bar to a pedicle screw
AssigneeSynthes USA, LLC
InventorsThomas Amrein, Martin Hess
Life of this patent
Estimating the term…
Abstract
A device for connecting a longitudinal bar to a pedicle screw for fixation of the spine includes a body having an axis, an upper end, a lower end, a hole coaxial with the axis, and a through hole positioned perpendicular to the axis. The device also includes a collet chuck slidably disposed within the hole. The collet chuck includes a through hole substantially aligned with the through hole of the body for receiving the longitudinal bar. The collet chuck also includes a chamber defined by elastic tongues for receiving the head of the pedicle screw.
Claims22
A spinal fixation system comprising:
- a longitudinal member;
- a fastener having a head, the fastener being configured and dimensioned for engaging vertebrae;
- and
- a connector for coupling the fastener and longitudinal member comprising:
- a body having a through hole extending from a top surface to a bottom surface, and a first opening in a side surface for receiving the longitudinal member;
- a collet chuck with at least a portion slidably received in the through hole of the body, the collet chuck having external threads and having a second opening for receiving the longitudinal member, the second opening being alignable with the first opening, and a plurality of resilient tongues defining a chamber for receiving the fastener head therein;
- and
- a locking element threadably associated with the external threads of the collet chuck for releasably locking movement of the longitudinal member with respect to the collet chuck;
- wherein engagement of the body with the tongues of the collet chuck moves the tongues inward to secure the fastener at a surgeon selected angle.
6 more elements
A spinal fixation system comprising:
- a longitudinal member;
- a fastener having a head and a threaded end for engaging a vertebra;
- and
- a connector for connecting the fastener and the longitudinal member comprising:
- a body having top, bottom, and side surfaces, a first opening in the side surface for receiving the longitudinal member, and a second opening extending from the top surface to the bottom surface;
- a collet chuck configured and dimensioned to be slidably received in the second opening of the body and having upper and lower ends, a third opening in the upper end with threading, a fourth opening alignable with the first opening of the body for receiving the longitudinal member, a plurality of resilient tongues, and a chamber defined by the tongues configured and dimensioned to receive the fastener head;
- and
- a threaded locking element for releasably fixing movement of the longitudinal member with respect to the first and fourth openings,
- wherein flexing of the tongues permits the fastener head to be received and retained in the chamber, and threading of the locking element with the threading of the collet chuck causes translation of the collet chuck and body with respect to each other.
6 more elements
A spinal fixation element system comprising:
- a spinal rod;
- a bone fastener having a head and an end portion for engaging a vertebra;
- and
- a connector for coupling the bone fastener to the spinal rod, the connector including:
- a first member having a first end, a second end, a through hole extending therebetween, and a first rod receiving channel;
- a second member at least partially slidably received in the through hole of the first member, the second member includes a top end, a second rod receiving channel substantially aligned with the first rod receiving channel when the second member is partially disposed within the first member, and a resilient bottom end defining a chamber for receiving the head of the bone fastener;
- and
- clamping securing means associated with the top end of the second member for releasably fixing the position of the spinal rod with respect to the second member and for moving the second member with respect to the first member without the securing means directly engaging the first member;
- wherein movement of the second member with respect to the first member causes the inward movement of the bottom end of the second member so that the position of the bone fastener is fixed with respect to the second member.
6 more elements
Dependencies are inferred from the claim text.