# US 2026/0090831 A1 · Implant osseux expansible de chirurgie orthopédique vétérinaire, système orthopédique et procédé de fabrication de l'implant

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- Number: US 2026/0090831 A1
- Document ID: US20260090831A1
- Status: Published application
- Kind: A1
- Application number: 19/340,569
- Filed: 2025-09-25
- Published: 2026-04-02
- Earliest claimed: 2024-09-25
- Assignees: In Life Vet SA
- Applicants: In Life Vet SA
- Inventors: Guillaume LACAZE
- Web page: https://patentgrep.com/patent/US20260090831A1

## CPC

- A61B 17/8858: {laterally or radially expansible (inflatable A61B17/8855)}
- A61B 17/8833: {Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means}
- A61B 17/8852: {capable of being assembled or enlarged, or changing shape, inside the bone or disc}
- A61F 2/28: Bones
- A61F 2/44: for the spine, e.g. vertebrae or spinal discs
- A61F 2/4611: {of spinal prostheses}
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2017/681: {Alignment, compression, or distraction mechanisms}
- A61F 2002/2835: {Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material}
- A61F 2002/30092: {using shape memory or superelastic materials, e.g. nitinol}
- A61F 2002/30156: {triangular}
- A61F 2002/30405: {made by screwing complementary threads machined on the parts themselves}
- A61F 2002/30471: {connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type}
- A61F 2002/30538: {for adjusting angular orientation}
- A61F 2002/30545: {for adjusting a diameter}
- A61F 2002/30556: {for adjusting thickness}
- A61F 2002/30579: {with mechanically expandable devices, e.g. fixation devices}
- A61F 2002/30583: {filled with hardenable fluid, e.g. curable in-situ}
- A61F 2002/30785: {parallel}
- 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 2002/4631: {the prosthesis being specially adapted for being cemented}
- A61F 2310/00353: Bone cement, e.g. polymethylmethacrylate or PMMA
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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)

## Abstract

The present invention relates to an implant, a system, and a manufacturing process for veterinary orthopedic surgery for restoring the volume and/or geometry of a bone by expanding at least two faces of the implant, each comprising a flange, the bringing together of the distal (12) and proximal (11) ends causing the support arms to pivot, causing the flanges to move away from each other and, consequently, the implant to expand, characterized in that an expansion sleeve or ring (20) and the proximal end of a central axis (3) of said implant can be moved away from each other to exert traction on the flanges, via expansion arms, which causes the support arms to pivot, resulting in controlled expansion of the implant (1) between said folded configuration and said deployed configuration.

## Claims

### Claim 1

An expandable bone implant (1) for veterinary orthopaedic surgery for restoring the volume and/or geometry of a bone by expansion between a folded configuration and a deployed configuration, said implant comprising a central shaft (3) and extending along a longitudinal axis (L) between a proximal end (11) adapted to cooperate with an implantation instrument (A) for holding the implant and a distal end (12) intended to be first inserted into the bone, at least two faces, for example, an upper and a lower face, of the implant each comprising at least one flange (13, 14, 15) for contact with bone tissue, each of the flanges being supported by at least two support arms (131, 141, 151) each, by means of a hinge on the central shaft (3) and a hinge under the respective flange (13, 14, 15) of each of said support arms (131, 141, 151);
wherein:
an expansion ring or socket (20) is arranged on the same axis as said central shaft (3);
at least two expansion arms (132, 142, 152) each have a hinge connecting them to one of the ends of one of the flanges (13, 14, 15) and a hinge connecting them to said expansion ring or socket (20);
said expansion ring or socket (20) and the proximal end of the central shaft (3) are able to be actuated in order to cause separation between said socket (3) and said central shaft (3), applying traction to the flanges (13, 14, 15), by means of the expansion arms (132, 142, 152), thereby causing said support arms (131, 141, 151) to pivot, causing the flanges (13, 14, 15) to move away from the central shaft (3), so as to result in controlled expansion of the implant (1) between said folded configuration and said deployed configuration.

### Claim 2 (depends on 1)

The expandable bone implant according to claim 1, wherein the expansion ring (20) is able to collaborate with a hollow tube (A1) used by said implantation instrument (A) for holding the implant (1), letting the expansion rod (A3) pass through the ring, while the central shaft (3) is able to collaborate with said expansion rod (A3) of said instrument (A) so that a pressing force exerted on said expansion rod (A3) sliding inside said hollow tube (A1) causes said central shaft (3) to move away from said ring (20), resulting in controlled expansion of the implant (1) dependent on the pressing force exerted on the expansion rod (A3).

### Claim 3 (depends on 1)

The expandable bone implant according to claim 1, wherein the proximal end of the central shaft (3) is able to collaborate with said hollow tube (A1) used by said implantation instrument (A) for holding the implant (1), whereas said expansion ring or socket (20) is able to collaborate with said expansion rod (A3) of said instrument (A) so that a pressing force exerted on said expansion rod (A3) sliding inside said hollow tube (A1) causes said expansion ring or socket (20) to move away from said central shaft (3), resulting in controlled expansion of the implant (1) dependent on the pressing force exerted on the expansion rod (A3).

### Claim 4 (depends on 1)

The expandable bone implant according to claim 1, wherein the flanges are provided, on their surface of contact with the bone tissue, with irregularities of shape such as protuberances or, conversely, invaginations to improve the gripping of the flanges on the bone tissue

### Claim 5 (depends on 1)

The expandable bone implant according to claim 1, wherein the central shaft (3) comprises a conduit (31) able to collaborate with said expansion rod (A3) which is, on the one hand, hollow and provided with at least one opening at its distal end and, on the other hand, able to be connected to a fluid-injection instrument (AC) for conveying at least one fluid to the implant implantation site via the central shaft (3), and which is preferably provided with openings (32) to disgorge the fluid along the length of the central shaft (3).

### Claim 6 (depends on 1)

The expandable bone implant according to claim 1, wherein the flange-support arms (131, 141, 151) comprise two arms connected respectively near the proximal and distal ends of their respective flange (13, 14, 15) to provide support along the entire length of the flanges and limit the risk of them bowing or sagging.

### Claim 7 (depends on 1)

The expandable bone implant according to claim 1, wherein at least one additional central support arm (130, 140, 150) is connected between a central portion of the central shaft and a central portion of the flanges (13, 14, 15), with hinges at the two ends of the support arm (130, 140, 150) to allow it to pivot.

### Claim 8 (depends on 1)

The expandable bone implant according to claim 1, wherein the distal-end support arms have a length different from that of the proximal-end support arms and of the central support arms.

### Claim 9 (depends on 1)

The expandable bone implant according to claim 1, wherein the implant comprises two flanges (13, 14) arranged one on each side of the central shaft (3) to provide a bearing surface to bear against the damaged bone tissue on each side of the implant, for example to restore a height or a width.

### Claim 10 (depends on 1)

The expandable bone implant according to claim 1, wherein the implant comprises at least one additional flange (15), the distribution of the flanges about the central shaft (3) varying according to the number of them and/or according to what is needed in terms of surgical intervention, these preferably being equally angularly distributed radially with respect to the central shaft so as to apply uniform compression to the bone tissue at the periphery of the implant.

### Claim 11 (depends on 1)

System for orthopaedic treatment of damaged bone tissue, comprising a bone substitute cement and at least one instrument (A) for implantation and for injection (Ac) of cement into the implant (1), wherein the system comprises an implant (1) according to claim 1.

### Claim 12 (depends on 11)

System according to claim 11, wherein the instrument (A) for implantation and for injection (Ac) of cement comprises means for controlling the pressure and/or the aspiration of the cement so that the implant can be re-folded to the folded configuration if necessary.

### Claim 13 (depends on 11)

System according to one of Claim 11, wherein the implantation instrument (A) is distinct from but complements the injection instrument (Ac) the cement-injection canal of which passes through a canal inside the rod of the implantation instrument (A) that via its distal end holds the proximal end of the implant (1).