US 2024/0180713 A1Published application

Cage for vertebral arthrodesis operations

OwnerClaudio Lamartina, Pedro Luis Berjano Coquillatinventors

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Abstract

A cage for vertebral arthrodesis operations has a body with a first surface for contact with an endplate and a second surface for contact with a second endplate, the surfaces arranged opposite each other in a coronal heightwise direction of the cage, an entry side for entry into the intervertebral disc space and a pushing side opposite the entry side in a direction of insertion into the intervertebral disc space. The cage has a continuous directional guide relief on one of two opposite surfaces for contact with a vertebral endplate; during insertion of the cage between the vertebral endplates from the entry side by means of action on the pushing side, the directional guide relief guides the cage along a predefined movement trajectory for insertion of the cage between the first vertebral endplate and the second vertebral endplate, from an entry point to a predefined and correct end position.

Claims24

Dependent claims

A cage for vertebral arthrodesis operations having a body (10) comprising a first surface (10a) for contact with a first vertebral endplate (1) and a second surface (10b) for contact with a second vertebral endplate (2), the first and second surfaces being arranged opposite each other in a coronal heightwise direction (Z-Z) of the cage, an entry side (LI) for entry into the intervertebral disc space and a pushing side (LS) opposite to the first side in a direction of insertion into the intervertebral disc space,

wherein the cage has at least one directional guide relief (11;111;311) formed on at least one of the two said opposite surfaces (10a,10b) for contact with a vertebral endplate,
said at least one directional guide relief (11;111;311) is configured and arranged to guide the cage along a predefined movement trajectory for insertion of the cage between the first vertebral endplate (1) and the second vertebral endplate (2) from an entry point as far as a predefined correct end position between the first vertebral endplate and the second vertebral endplate, as a result of insertion of the cage between the vertebral endplates from the entry side by means of action on the pushing side.
characterized in that said at least one directional guide relief (11;111;311) comprises a continuous relief which has an inclined rectilinear development or mixed development with at least one inclined rectilinear section;
and in that said at least one directional guide relief (11;111;311) projects from the contact surface of the cage with a height in the vertical-coronal direction (Z-Z) of between 0.5 and 4 mm.

1 more element

An adapter plate (110) for a cage for vertebral arthrodesis operations having a body (10) comprising a first contact surface (10a) and a second contact surface (10b) arranged opposite each other in a coronal heightwise direction (Z-Z) of the cage, an entry side (LI) for entry into the intervertebral disc space and a pushing side (LS) opposite to the entry side in a direction of insertion into the intervertebral disc space,

the adapter plate (110) comprising a plate body which has:
a first surface (110a) for contact with a vertebral endplate (1) and a second surface (110b) for contact with a contact surface (12a,12b) of the cage, the first and second contact surfaces of the plate being opposite each other in a vertical-coronal heightwise direction (Z-Z) of the plate (110);
an entry side (LI) for entry into the intervertebral disc space;
and a pushing side (LS) opposite to the entry side in a direction of insertion into the intervertebral disc space;
wherein the adapter plate (110) has at least one continuous directional guide relief (211) formed on the first contact surface (110a), which has an inclined rectilinear development or mixed development with at least one inclined rectilinear section;
said at least one directional guide relief (211) projecting from the first contact surface of the plate with a height in the vertical-coronal direction (Z-Z) of between 0.5 and 4 mm;
wherein the plate is configured for stable joining together with the cage (12) so as to form therewith a single monolithic body before insertion into the intervertebral disc space and said at least one directional guide relief (211) of the adapter plate (110) is configured and arranged to guide the cage along a predefined movement trajectory suitable for insertion of the cage between the first vertebral endplate (1) and a second vertebral endplate (2), from an entry point as far as a predefined and correct end position between the first vertebral endplate and the second vertebral endplate, as a result of insertion of the cage between the vertebral endplates from the entry side by means of action on the pushing side.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/279,403Filed 4 Mar 2022
Priority: IT 1020210000053728 Mar 2021
Published: 6 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

A61F 2/4455
For the spine, e.g. vertebrae or spinal discs: for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion…
A61F 2/30734
Accessories: modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
A61F 2/447
For the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages: substantially parallelepipedal, e.g.…
A61F 2/4611
For insertion or extraction of endoprosthetic joints or of accessories thereof: of spinal prostheses