Combined spinal interbody and plate assemblies
View Patent ↗A spinal implant assembly combines a spinal interbody spacer with a spine plate. The combined spacer and plate assembly provides stabilization and torsional resistance to promote fusion of adjacent vertebrae. The spacer is configured for placement within an intervertebral space between the adjacent vertebrae previously occupied by a spinal disc. The plate is configured for attachment to anterior sides of the adjacent vertebrae. Translation of the spinal plate allows it to be affixed to the vertebrae in various positions and/or allow movement post installation. In one form, the plate is defined by first and second spine plate or plate portions that are coupled to one another to allow rotation about each other. Ends of the first and second spine plates are received in/by the interbody spacer, while a pin extends through the interbody spacer to fix the first and second spine plates to the interbody spacer.
1. A spinal implant comprising:
a spacer formed of a body configured for reception and retention between a first vertebra and second vertebra, the body having a first lateral side, a second lateral side opposite the first lateral side, a first side extending between the first and second lateral sides and configured to engage the first vertebra, a second side extending between the first and second lateral sides opposite the first side and configured to engage the second vertebra, and a cavity defined and substantially enclosed by the first and second sides and the first and second lateral sides, the body defining a first axis;
a pin extending through the cavity of the spacer between the first and second lateral sides and defining a second axis generally perpendicular to the first axis;
a spine plate coupled to the spacer, the spine plate comprising:
a first spine plate portion having a first end and a second end, the first end having a bone screw bore to allow attachment of the first spine plate portion to the first vertebra via a first bone screw, and the second end extending into the cavity between the first and second sides, and coupled to the pin; and
a second spine plate portion having a first end and a second end, the first end having a second bone screw bore to allow attachment of the second spine plate portion to the second vertebra via a second bone screw, and the second end extending into the cavity between the first and second sides, and coupled to the pin;
wherein the first spine plate portion and second spine plate portion are configured for translational movement along the first axis and rotational movement about the second axis, wherein at least the translational movement provides adjustable positioning of the first and second spine plate portions relative to the spacer along the first axis to allow the spacer to be affixed to the first and second vertebrae in a plurality of positions, wherein the translational movement and the rotational movement of the second ends of the first and second spine plate portions are contained within the spacer between the first and second sides and the first and second lateral sides.
2. The spinal implant of claim 1 , wherein the first spine plate and the second spine plate are connected by the pin for rotational movement relative to each other.
3. The spinal implant of claim 1 , wherein:
the first spine plate portion includes a first angled section between the first end and the second end so that the second end is at a first angle relative to the first end; and
the second spine plate portion includes a second angled section between the first end and the second end so that the second end is at a second angle relative to the first end.
4. The spinal implant of claim 3 , wherein the first angle is an obtuse angle and the second angle is an obtuse angle.
5. The spinal implant of claim 1 , wherein the first bone screw bore is tapered for angled reception of the first bone screw, and the second bone screw bore is tapered for angled reception of the second bone screw.
6. The spinal implant of claim 1 , wherein the second end of the first spine plate portion includes a pair of spaced apart arms, and wherein the second end of the second spine plate portion includes an angled arm located between the pair of spaced apart arms of the first spine plate portion.
7. The spinal implant of claim 1 , wherein the spacer includes a pair of opposed and aligned bores that are in communication with the cavity and receive ends of the pin.
8. The spinal implant of claim 7 , wherein the bores are elongated bores.
9. The spinal implant of claim 8 , wherein the elongated bores extend entirely through the first and second lateral sides of the spacer that at least partially define the cavity.
10. A spinal implant comprising:
a spacer formed of a body configured for reception and retention between a first vertebra and second vertebra, the body having a first lateral side, a second lateral side opposite the first lateral side, a first side extending between the first and second lateral sides and configured to engage the first vertebra, a second side extending between the first and second lateral sides opposite the first side and configured to engage the second vertebra, and a cavity defined and substantially enclosed by the first and second sides and the first and second lateral sides, the body defining a first axis;
a pin extending through the cavity of the spacer between the first and second lateral sides and defining a second axis generally perpendicular to the first axis;
a spine plate coupled to the spacer, the spine plate comprising:
a first spine plate portion having a first end, a second end, and an angled section connecting the first end and the second end so that the first end is at an obtuse angle relative to the second end, the first end having a bone screw bore to allow attachment of the first spine plate portion to the first vertebra via a first bone screw, and the second end located at least partially in the cavity and coupled to the pin; and
a second spine plate portion having a first end, a second end, and an angled section connecting the first end and the second end so that the first end is at an obtuse angle relative to the second end, the first end having a second bone screw bore to allow attachment of the second spine plate portion to the second vertebra via a second bone screw, and the second end located at least partially in the cavity and coupled to the pin;
wherein the first spine plate portion and second spine plate portion are configured for translational movement and rotational movement relative to the spacer and to each other, wherein at least the translational movement provides adjustable translating positioning of the first and second spine plate portions relative to the spacer along the first axis to allow the spacer to be affixed to the first and second vertebrae in a plurality of positions and/or allow movement post installation perpendicular to the second axis, and wherein the translational movement and the rotational movement of the second ends of the first and second spine plate portions are contained within the spacer.
11. The spinal implant of claim 10 , wherein the second end of the first spine plate portion includes a pair of spaced apart arms, and wherein the second end of the second spine plate portion includes an angled arm located between the pair of spaced apart arms of the first spine plate portion.
12. The spinal implant of claim 10 , wherein the spacer includes a pair of opposed and aligned bores that are in communication with the cavity and receive ends of the pin.
13. The spinal implant of claim 12 , wherein the bores extend entirely through the first and second lateral sides of the spacer that at least partially define the cavity.