Zero-profile interbody spacer and coupled plate assembly
First Claim
1. A plate configured to be coupled to a spacer to form an intervertebral implant, the plate comprising:
- a trailing surface defining a first opening of a first bone fixation hole and a first opening of a second bone fixation hole, the first opening of the first bone fixation hole spaced from the first opening of the second bone fixation hole in a first direction, the first bone fixation hole configured to receive a first bone fixation element such that the first bone fixation element secures the plate to a first vertebra, the second bone fixation hole configured to receive a second bone fixation element such that the second bone fixation element secures the plate to a second vertebra that is spaced from the first vertebra;
a leading surface spaced from the trailing surface in a second direction that is substantially perpendicular to the first direction;
a top surface configured to face the first vertebra when the plate is implanted;
a bottom surface configured to face the second vertebra when the plate is implanted, the top surface spaced from the bottom surface in a third direction that is substantially perpendicular to both the first direction and the second direction, and the top surface facing in the third direction;
a stop that protrudes from the top surface in the third direction, the stop including a first surface and a second surface, the second surface spaced from the first surface in the second direction and the second surface facing in the second direction, the first surface defining a first width measured along the first direction at a first location, the second surface defining a second width measured along the first direction at a second location, the first location aligned with the second location along the second direction, and the second width is greater than the first width,wherein the stop includes at least one projection that protrudes from the second surface in the second direction, the at least one projection configured to embed into the first vertebra to secure the plate to the first vertebra, andwherein a portion of the top surface is positioned between the second surface and a second opening of the first bone fixation hole with respect to the second direction.
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Accused Products
Abstract
An implant for insertion into a disc space between vertebrae, wherein the implant includes a spacer portion, a plate portion coupled to the spacer portion, two bone fixation elements for engaging the vertebrae and a retention mechanism for preventing the bone fixation elements from postoperatively backing-out of the plate portion. The retention mechanism may be in the form of a spring biased snapper element that is biased into communication with the bone fixation elements so that once the bone fixation element advances past the snapper element, the snapper element is biased back to its initial position in which the snapper element interfaces with the bone fixation elements. Alternatively, the retention mechanism may be in the form of a propeller rotatable between a first position in which the bone fixation elements are insertable to a second position where the bone fixation elements are prevented from backing-out.
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Citations
21 Claims
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1. A plate configured to be coupled to a spacer to form an intervertebral implant, the plate comprising:
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a trailing surface defining a first opening of a first bone fixation hole and a first opening of a second bone fixation hole, the first opening of the first bone fixation hole spaced from the first opening of the second bone fixation hole in a first direction, the first bone fixation hole configured to receive a first bone fixation element such that the first bone fixation element secures the plate to a first vertebra, the second bone fixation hole configured to receive a second bone fixation element such that the second bone fixation element secures the plate to a second vertebra that is spaced from the first vertebra; a leading surface spaced from the trailing surface in a second direction that is substantially perpendicular to the first direction; a top surface configured to face the first vertebra when the plate is implanted; a bottom surface configured to face the second vertebra when the plate is implanted, the top surface spaced from the bottom surface in a third direction that is substantially perpendicular to both the first direction and the second direction, and the top surface facing in the third direction; a stop that protrudes from the top surface in the third direction, the stop including a first surface and a second surface, the second surface spaced from the first surface in the second direction and the second surface facing in the second direction, the first surface defining a first width measured along the first direction at a first location, the second surface defining a second width measured along the first direction at a second location, the first location aligned with the second location along the second direction, and the second width is greater than the first width, wherein the stop includes at least one projection that protrudes from the second surface in the second direction, the at least one projection configured to embed into the first vertebra to secure the plate to the first vertebra, and wherein a portion of the top surface is positioned between the second surface and a second opening of the first bone fixation hole with respect to the second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A plate configured to be coupled to a spacer to form an intervertebral implant, the plate comprising:
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a trailing surface defining a first opening of a first bone fixation hole and a second opening of a second bone fixation hole, the first opening spaced from the second opening in a first direction, the first bone fixation hole configured to receive a first bone fixation element such that the first bone fixation element secures the plate to a first vertebra, the second bone fixation hole configured to receive a second bone fixation element such that the second bone fixation element secures the plate to a second vertebra; a leading surface spaced from the trailing surface in a second direction that is substantially perpendicular to the first direction, the leading surface configured to face the spacer when the plate is coupled to the spacer; a top surface configured to face the first vertebra when the plate is implanted; a bottom surface configured to face the second vertebra when the plate is implanted, the top surface spaced from the bottom surface in a third direction that is substantially perpendicular to both the first direction and the second direction, and the first bone fixation hole positioned between the top surface and the bottom surface with respect to the third direction; and a stop that protrudes from the top surface in the third direction, the stop including a first surface that faces in the second direction, wherein the first surface is;
1) between the leading surface and the trailing surface with respect to the second direction, and
2) offset from both the leading surface and the trailing surface with respect to the third direction, the stop further including a second surface opposite the first surface, the second surface aligned with the first bone fixation hole with respect to the third direction, the stop defining a first thickness measured from a first location on the second surface to the first surface along a direction perpendicular to the second surface, the stop further defining a second thickness measured from a second location on the second surface to the first surface along the direction perpendicular to the second surface, the first location offset from the second location in the third direction, and the second thickness is greater than the first thickness,wherein the plate is devoid of a second stop that;
1) protrudes from the bottom surface, and
2) includes a second surface that is aligned with the first surface with respect to the third direction such that a straight line in the third direction intersects both the first surface and the second surface. - View Dependent Claims (19, 20, 21)
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Specification