SPINAL FIXATION SYSTEMS AND METHODS
First Claim
1. A translation screw assembly comprising:
- a screw having a threaded shaft and an enlarged head at a proximal end; and
a housing having an upper portion with an upper opening and a lower portion with a lower opening extending along a first axis of the housing, wherein the enlarged head of the screw is disposed within the housing and the shaft extends out of the housing through the lower opening, the housing having a third opening and a fourth opening along a second axis transverse to the first axis adapted to receive an elongated rod, wherein the screw is configured to translate, pivot, and rotate relative to the housing.
1 Assignment
0 Petitions
Accused Products
Abstract
Translation screw assemblies that can include a screw, housing, load plate, and collet are described herein. The translation screw assembly advantageously allows for relative translation, angulation or pivoting, and/or rotation between the screw and the housing. Occipital plate assemblies are also described herein. An occipital plate assembly can include a plate body and one or more rod receiving assemblies. The plate assembly can include an occipital protuberance tab that can be bent relative to or sheared off from the plate body. The rod receiving assembly can include a pivot post, housing, clamp plate, and retaining washer. The rod-receiving assemblies advantageously allow for relative medial-lateral translation, medial-lateral angulation, and/or cranial-caudal angulation between the rod-receiving assemblies or portions thereof (e.g., the housings) and plate body.
63 Citations
16 Claims
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1. A translation screw assembly comprising:
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a screw having a threaded shaft and an enlarged head at a proximal end; and a housing having an upper portion with an upper opening and a lower portion with a lower opening extending along a first axis of the housing, wherein the enlarged head of the screw is disposed within the housing and the shaft extends out of the housing through the lower opening, the housing having a third opening and a fourth opening along a second axis transverse to the first axis adapted to receive an elongated rod, wherein the screw is configured to translate, pivot, and rotate relative to the housing. - View Dependent Claims (2, 3, 4, 5)
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6. An occipital plate assembly comprising:
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a plate body comprising at least one screw receiving hole configured to receive a bone screw therethrough; and an occipital protuberance tab coupled to the plate body via at least one junction, wherein a top surface of the at least one junction comprises a material relief comprising a reduced thickness area configured such that if a sufficient downward force is applied to the occipital protuberance tab, the occipital protuberance tab shears off from the plate body at the at least one junction. - View Dependent Claims (7, 8, 9, 10)
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11. An occipital plate assembly comprising:
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a plate body comprising at least one screw receiving hole configured to receive a bone screw therethrough; and at least one rod receiving assembly coupled to the plate body and comprising a housing configured to receive an elongated rod, wherein the housing is configured to translate in a medial-lateral direction, angulate in a medial-lateral direction, and angulate in a cranial-caudal direction relative to the plate body. - View Dependent Claims (12, 13, 14, 15)
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16. An occipital fixation system, comprising:
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an occipital plate assembly comprising; a plate body sized for positioning on a patient'"'"'s occipital bone, the plate body comprising at least one screw receiving hole configured to receive a bone screw therethrough; and a pair of rod receiving assemblies coupled to the plate body each comprising a housing configured to receive an elongated rod, wherein each housing is configured to translate in a medial-lateral direction, angulate in a medial-lateral direction, and angulate in a cranial-caudal direction relative to the plate body; a plurality of screw assemblies configured to be inserted into adjacent vertebrae of the patient'"'"'s cervical spine, each of the plurality of screw assemblies comprising; a screw having a threaded shaft and an enlarged head at a proximal end; and a housing having an upper portion with an upper opening and a lower portion with a lower opening extending along a first axis of the housing, wherein the enlarged head of the screw is disposed within the housing and the shaft extends out of the housing through the lower opening, the housing having a third opening and a fourth opening along a second axis transverse to the first axis adapted to receive an elongated rod, wherein the screw is configured to translate, pivot, and rotate relative to the housing; and a pair of rods sized to be received within the rod receiving assemblies of the occipital plate assembly and the housings of the screw assemblies to connect the occipital plate assembly when positioned on the patient'"'"'s occipital bone to the screw assemblies when inserted into adjacent vertebrae of the patient'"'"'s cervical spine.
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Specification