# US 11,076,891 B2 · Bi-directional motion spinal implant

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- Number: US 11,076,891 B2
- Document ID: US11076891B2
- Status: Granted
- Kind: B2
- Application number: 16/449,403
- Filed: 2019-06-23
- Published: 2020-12-24
- Granted: 2021-08-03
- Earliest claimed: 2019-06-23
- Assignees: Premia Spine Ltd.
- Applicants: Premia Spine Ltd.
- Inventors: Rafi Haziza; Uri Arnin
- Web page: https://patentgrep.com/patent/US11076891B2

## CPC

- A61B 17/7001: {Screws or hooks combined with longitudinal elements which do not contact vertebrae (A61B17/7058 takes precedence)}
- A61B 17/7049: {Connectors, not bearing on the vertebrae, for linking longitudinal elements together (A61B17/7055, A61B17/7053, A61B17/7019 take precedence)}
- A61B 17/7004: {with a cross-section which varies along its length (A61B17/7019 takes precedence)}
- A61B 17/7007: {Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads}
- A61B 17/7023: {with a pivot joint}
- A61B 17/7025: {with a sliding joint}
- A61B 17/8625: {Shanks, i.e. parts contacting bone tissue}
- A61B 17/8605: {Heads, i.e. proximal ends projecting from bone}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A spinal implant includes first and second pedicle screws, each of which comprises a threaded shank coupled to a head. First and second cantilevered arms are coupled to the first and second pedicle screws, respectively. The first cantilevered arm includes a contact member arranged to contact and move over a contact portion of the second cantilevered arm.

## Claims

### Claim 1

A spinal implant comprising:
first and second pedicle screws, each of which comprises a threaded shank coupled to a head; and
first and second cantilevered arms coupled to said first and second pedicle screws, respectively, wherein said first cantilevered arm comprises a rollable contact member arranged to contact and move over a contact portion of said second cantilevered arm, said rollable contact member being movable in rotation and translation.

### Claim 2 (depends on 1)

The spinal implant according to claim 1, wherein an outer contour of said head is convex, and each of said first and second cantilevered arms comprises a concave inner portion, and said first and second cantilevered arms are secured to said first and second pedicle screws, respectively, with a fastener that presses said concave inner portion against said outer contour of said head.

### Claim 3 (depends on 2)

The spinal implant according to claim 2, wherein a fastener-interface portion of each of said first and second cantilevered arms is convex, and said fastener comprises a concave inner portion configured to press against said fastener-interface portion.

### Claim 4 (depends on 1)

The spinal implant according to claim 1, wherein said first and second cantilevered arms are parallel to each other.

### Claim 5 (depends on 1)

The spinal implant according to claim 1, wherein said contact member is convex and said contact portion is concave.

### Claim 6 (depends on 1)

The spinal implant according to claim 1, wherein said contact member comprises a round roller element, which is cylindrical or spherical.

### Claim 7 (depends on 1)

The spinal implant according to claim 1, wherein said second cantilevered arm comprises at least one side wall that straddles said contact member.

### Claim 8 (depends on 1)

The spinal implant according to claim 1, wherein said contact member is pivotally coupled to said first cantilevered arm.

### Claim 9 (depends on 1)

The spinal implant according to claim 1, wherein said contact member is fixedly coupled to said first cantilevered arm.

### Claim 10 (depends on 1)

The spinal implant according to claim 1, wherein said contact member is movable independently of both said first and second cantilevered arms.

### Claim 11 (depends on 1)

The spinal implant according to claim 1, wherein said first and second cantilevered arms are each pivoted about a pivot with respect to a base member that fits over said head.

### Claim 12 (depends on 1)

The spinal implant according to claim 1, wherein said contact member has a different hardness than said contact portion.

### Claim 13 (depends on 1)

The spinal implant according to claim 1, wherein said contact member is movable 360° in rotation without hindrance.