# US 10,864,085 B2 · Expandable coil spinal implant

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- Number: US 10,864,085 B2
- Document ID: US10864085B2
- Status: Granted
- Kind: B2
- Application number: 15/859,785
- Filed: 2018-01-02
- Published: 2018-05-03
- Granted: 2020-12-15
- Earliest claimed: 2013-03-14
- Assignees: DePuy Synthes Products, Inc.
- Applicants: DePuy Synthes Products, Inc.
- Inventors: Joern Richter; Jacques Teisen
- Web page: https://patentgrep.com/patent/US10864085B2

## CPC

- A61F 2/442: {Intervertebral or spinal discs, e.g. resilient (non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455)}
- A61B 17/7097: {Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants (disc prostheses made of inflatable chambers or pockets filled with fluid A61F2/441; replacing the nucleus pulposus A61F2002/444)}
- A61B 17/8811: {characterised by the introducer tip, i.e. the part inserted into or onto the bone}
- A61B 17/8855: {inflatable, e.g. kyphoplasty balloons}
- A61F 2/44: for the spine, e.g. vertebrae or spinal discs
- A61F 2/441: {made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel}
- A61F 2/4455: {for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages (intervertebral discs A61F2/442)}
- A61F 2/4601: {for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity}
- A61F 2/4611: {of spinal prostheses}
- A61B 2017/0256: {for the spine}
- A61F 2002/2817: {Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]}
- A61F 2002/2835: {Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material}
- A61F 2002/30019: {differing in mechanical expandability, e.g. in mechanical, self- or balloon expandability}
- A61F 2002/30056: {differing in radiographic density}
- A61F 2002/30062: {(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive}
- A61F 2002/3008: {radio-opaque, e.g. radio-opaque markers}
- A61F 2002/30092: {using shape memory or superelastic materials, e.g. nitinol}
- A61F 2002/30153: {rectangular}
- A61F 2002/30235: {tubular, e.g. sleeves}
- A61F 2002/30263: {cubical}
- A61F 2002/30289: {helically-coiled}
- A61F 2002/30291: {spirally-coiled, i.e. having a 2D spiral cross-section}
- A61F 2002/30331: {made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit}
- A61F 2002/30462: {retained or tied with a rope, string, thread, wire or cable}
- A61F 2002/30484: {Mechanically expandable devices located on the first prosthetic part for locking into or onto the second prosthetic part}
- A61F 2002/3052: {unrestrained in only one direction, e.g. moving unidirectionally}
- A61F 2002/30556: {for adjusting thickness}
- A61F 2002/30563: {having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers}
- A61F 2002/30581: {having a pocket filled with fluid, e.g. liquid}
- A61F 2002/30583: {filled with hardenable fluid, e.g. curable in-situ}
- A61F 2002/30584: {filled with gas}
- A61F 2002/30586: {having two or more inflatable pockets or chambers}
- A61F 2002/30588: {filled with solid particles}
- A61F 2002/30593: {hollow}
- A61F 2002/30594: {slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots}
- A61F 2002/30601: {telescopic}
- A61F 2002/30677: {Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body}
- A61F 2002/30772: {Apertures or holes, e.g. of circular cross section}
- A61F 2002/30784: {Plurality of holes}
- A61F 2002/448: {comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants}
- A61F 2002/4627: {with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument}
- A61F 2002/4635: {using minimally invasive surgery}
- A61F 2002/4683: {by applying ultrasonic vibrations}
- A61F 2002/4688: {having operating or control means}
- A61F 2310/00017: Iron- or Fe-based alloys, e.g. stainless steel
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/00047: Aluminium or Al-based alloys
- A61F 2310/00071: Nickel or Ni-based alloys
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Coiled spinal implants for disc, vertebral body, and spinal motion segment replacement or reconstruction comprise a plurality of loops and spaces between the loops, with the loops formed of a hollow material and having a plurality of apertures or a longitudinal gap that extend(s) through the sidewalls of the loops and into the hollow center. The coiled implants include one or more balloons within the hollow center, the spaces between the coil loops, and/or within the central void that the coil surrounds. Filling the balloon expands the loops and thereby increases the height of the coil. Bone graft material or bone cement may be deployed from the apertures or gap.

## Claims

### Claim 1

A surgical method, comprising:
inserting an expandable coil having at least one expandable loop into a spinal location in a patient, the expandable coil having a lumen that extends between a first end and a second end, the expandable coil having sidewalls defining a central void, the expandable coil having at least one balloon disposed outside of the sidewalls;
filling the balloon to increase a size of the expandable coil in a height dimension,
wherein no portion of the balloon is disposed within the lumen of the expandable coil.

### Claim 2 (depends on 1)

The method of claim 1, wherein the expandable coil is inserted into the patient in an uncoiled orientation.

### Claim 3 (depends on 1)

The method of claim 1, wherein the spinal location comprises an intervertebral space.

### Claim 4 (depends on 1)

The method of claim 1, further comprising engaging the expandable coil with a tool to position the expandable coil in the patient.

### Claim 5 (depends on 1)

The method of claim 1, wherein the balloon occupies a portion of the central void after being filled.

### Claim 6 (depends on 1)

The method of claim 1, wherein the balloon is wedged between sidewalls of adjacent loops.

### Claim 7 (depends on 1)

The method of claim 1, wherein the expandable coil has one or more apertures that pass through the sidewalls towards the central void.

### Claim 8 (depends on 1)

The method of claim 1, wherein the balloon is filled with one or more of physiologic saline solution, a radiopaque contrast solution, water, a hydrogel, a polymerizable monomer or polymer, a bone cement, a crystallizable material, and a polymethyl methacrylate (PMMA).

### Claim 9 (depends on 1)

The method of claim 1, further comprising delivering one or more of a bone graft material, a bone cement, air, and fluid into the central void of the expandable coil.

### Claim 10 (depends on 1)

The method of claim 1, further comprising removing the expandable coil from the patient.

### Claim 11 (depends on 10)

The method of claim 10, wherein the balloon is left in the patient after the expandable coil is removed.

### Claim 12

A surgical method, comprising:
inserting an expandable coil having a plurality of expandable loops stacked in a height dimension into a spinal location in a patient, the expandable coil having a first end, a second end, and sidewalls defining a central void, the expandable coil having at least one balloon disposed outside of the sidewalls; and
filling the balloon to increase a size of the expandable coil in a height dimension.

### Claim 13 (depends on 12)

The method of claim 12, wherein the expandable coil is inserted into the patient in an uncoiled orientation.

### Claim 14 (depends on 12)

The method of claim 12, wherein the spinal location comprises an intervertebral space.

### Claim 15 (depends on 12)

The method of claim 12, further comprising engaging the expandable coil with a tool to position the expandable coil in the patient.

### Claim 16 (depends on 12)

The method of claim 12, wherein the balloon occupies a portion of the central void after being filled.

### Claim 17 (depends on 12)

The method of claim 12, wherein the balloon is wedged between sidewalls of adjacent loops.

### Claim 18 (depends on 12)

The method of claim 12, wherein the expandable coil has one or more apertures that pass through the sidewalls towards the central void.

### Claim 19 (depends on 12)

The method of claim 12, wherein the balloon is filled with one or more of physiologic saline solution, a radiopaque contrast solution, water, a hydrogel, a polymerizable monomer or polymer, a bone cement, a crystallizable material, and a polymethyl methacrylate (PMMA).

### Claim 20 (depends on 12)

The method of claim 12, further comprising delivering one or more of a bone graft material, a bone cement, air, and fluid into the central void of the expandable coil.

### Claim 21 (depends on 12)

The method of claim 12, further comprising removing the expandable coil from the patient.

### Claim 22 (depends on 21)

The method of claim 21, wherein the balloon is left in the patient after the expandable coil is removed.