Adjustable occipital plate
First Claim
1. An occipital plate, comprising:
- a base plate having;
an elongated central section with a midline; and
a first section and a second section projecting laterally outward in opposite directions from the midline of the base plate, wherein the first section comprises a slot extending substantially parallel to a length of the first section; and
an attachment assembly having;
a slide member configured to move along the slot of the first section;
a post coupled to the slide member, wherein the post has a first cross dimension and a second cross dimension wherein the first cross dimension of the post is less than a first cross dimension of the slide member and wherein the second cross dimension of the post is approximately equal to a second cross dimension of the slide member; and
an angle limiting mechanism defining a range of rotation of the attachment assembly, wherein a medial-lateral distance between the attachment assembly and the midline of the base plate is adjustable relative to the angle along the slot of the first section, wherein at least a portion of the attachment assembly is rotatable after the slide member is positioned in the slot and coupled to the base plate, and wherein the angle limiting mechanism facilitates the attachment assembly to self-align or essentially self-align with a rod as the rod is received in an opening of the post of the attachment assembly.
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Accused Products
Abstract
An occipital plate for use in an occipito-cervico-thoracic (OCT) construct is mounted to a patient'"'"'s occipital bone. The occipital plate includes an elongate central section aligned with a midline of the base and a pair of angled sections that project away from the central section and include attachment assemblies for securing a rod to the occipital plate. The attachment assemblies have multi-adjustability features. At least a portion of the attachment assemblies is rotatable with respect to the base so that the rods may be coupled to the occipital plate at a variety of angles with respect to the midline. The angular adjustability may accommodate any misalignments in the rods. Additionally, the position of the attachment assemblies relative to the midline of the occipital plate is adjustable to thereby provide for medial-lateral adjustability when attaching the rods to the occipital plate as part of the OCT construct.
117 Citations
21 Claims
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1. An occipital plate, comprising:
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a base plate having; an elongated central section with a midline; and a first section and a second section projecting laterally outward in opposite directions from the midline of the base plate, wherein the first section comprises a slot extending substantially parallel to a length of the first section; and an attachment assembly having; a slide member configured to move along the slot of the first section; a post coupled to the slide member, wherein the post has a first cross dimension and a second cross dimension wherein the first cross dimension of the post is less than a first cross dimension of the slide member and wherein the second cross dimension of the post is approximately equal to a second cross dimension of the slide member; and an angle limiting mechanism defining a range of rotation of the attachment assembly, wherein a medial-lateral distance between the attachment assembly and the midline of the base plate is adjustable relative to the angle along the slot of the first section, wherein at least a portion of the attachment assembly is rotatable after the slide member is positioned in the slot and coupled to the base plate, and wherein the angle limiting mechanism facilitates the attachment assembly to self-align or essentially self-align with a rod as the rod is received in an opening of the post of the attachment assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An occipital plate, comprising:
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a base plate having; an elongated central section with a midline; and a first section and a second section projecting laterally outward in opposing directions from the midline of the base plate, wherein the first section comprises; a slot extending substantially parallel to a length of the first section; and a groove formed on side edges of the slot; and an attachment assembly having; a slide member comprising at least one extension projecting from a periphery of the slide member to mate with the groove formed on the side edges of the slot so that a dove-tail joint construct is formed between the base plate and the attachment assembly; and a post coupled to the slide member, wherein the post has a first cross dimension and a second cross dimension, wherein the first cross dimension of the post is less than a first cross dimension of the slide member, and wherein the second cross dimension of the post is approximately equal to a second cross dimension of the slide member; wherein the slide member is constrained by the dove-tail joint construct to move along the slot of the first section, wherein a medial-lateral distance between the attachment assembly and the midline of the base plate is adjustable, wherein at least a portion of the attachment assembly is rotatable after the slide member is positioned in the slot and coupled to the base plate, and wherein the at least one extension of the slide member is configured to limit angular orientation of a rod coupled to the post of the attachment assembly to a range of angles relative to the midline of the base plate.
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Specification