Back to results
US 7,699,876 B2Granted
Multi-axial bone fixation apparatus
AssigneeEbi, LLC
InventorsDavid Barry, Rui J. Ferreira, Kirk J. Bailey
Life of this patent
Estimating the term…
Abstract
A bone fixation device. The bone fixation device includes a receiver having a deformable portion, a bone fastener having a head, the head insertable into the receiver from the deformable portion, and a retaining member couplable to the deformable portion. The retaining member deforms the deformable portion and angulatably retains the fastener relative to the receiver.
Claims22
A multi-axial bone fixation device comprising:
- a receiver defining an axial opening alone a longitudinal axis, the receiver having first and second portions along the longitudinal axis, the second portion being radially compressible;
- a bone fastener having a head, the head insertable into the axial opening in a direction from the second portion to the first portion;
- a hollow member received around the second portion, the hollow member compressing the second portion and retaining the head while allowing angulation of the fastener relative to the longitudinal axis;
- and
- a first ring carried by the head of the fastener, the first ring maintaining a position of the fastener relative to the receiver before implantation.
2 more elements
A multi-axial bone fixation device comprising:
- a receiver defining an axial opening along a longitudinal axis, the receiver having an upper portion and a lower portion along the longitudinal axis, the lower portion comprising a plurality of spaced apart flexible elements;
- a bone fastener having a head and a bone-engaging elongated portion, the head insertable into the axial opening along the longitudinal axis in a direction from the lower portion to the upper portion, the head having an external circumferential groove;
- a friction element supported in the circumferential groove;
- and
- a hollow member having a surface tapered along the longitudinal axis and received around the lower portion, the hollow member compressing the plurality of flexible elements such that the fastener is retained in the receiver and permitted to angulate relative to the longitudinal axis.
2 more elements
A multi-axial bone fixation device comprising:
- a receiver defining an axial opening along a longitudinal axis, and a transverse opening along a transverse axis, the receiver having an upper portion and a lower portion along the longitudinal axis, the lower portion comprising a plurality of spaced apart elongated elements, each elongated element having a flange extending proximate a distal end thereof;
- a bone fastener having a head and a bone-engaging elongated portion, the head insertable into the axial opening along the longitudinal axis in a direction from the lower portion to the upper portion, the head having a first circumferential groove;
- an annular member insertable into the axial opening from the upper portion over the head of the fastener, the annular member having a second circumferential groove;
- a first retention element supported in the first circumferential groove;
- a second retention element supported in the second circumferential groove;
- a hollow member having a surface tapered along the longitudinal axis and received around the lower portion, the hollow member defining an inner groove engaging the flanges of the elongated elements and compressing the elongated elements such that the fastener is retained in the receiver and can angulate relative to the longitudinal axis;
- an elongated element insertable in the receiver along the transverse axis;
- and
- a securing element threadably received in the upper portion of the receiver over the elongated element, such that when the securing element is fully threaded to the receiver, the securing element transmits a force to the head of the fastener and secures the fastener in the receiver at a selected angle relative to the longitudinal axis.
6 more elements
A bone fixation device comprising:
- a receiver having a deformable portion:
- a bone fastener having a head, the head insertable into the receiver from the deformable portion;
- a retaining member couplable to the deformable portion, the retaining member deforming the deformable portion and angulatably retaining the fastener relative to the receiver, the retaining member defining an opening having a tapered inner surface, the tapered inner surface compressing the deformable portion when the deformable portion is received in the opening of the retaining member;
- and
- a split ring at least partially disposed in a circumferential groove of the head.
2 more elements
Dependencies are inferred from the claim text.