US 11,534,307 B2Granted

3D printed cervical standalone implant

AssigneeK2M, Inc.

InventorsJared Gordon Struck, Robert Clint Boyd, Dane Matthew Johannessen, Jennifer Anne Moore, Bryan D. Milz, Choll Kim, Alex Mohit, Yashar Javidan

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Abstract

In one embodiment, an intervertebral implant includes a body and a locking element. The body includes a leading surface and a trailing surface opposite the leading surface. The body also includes first and second bone fastener passageways through the implant body and a cavity in between the first and second passageways. The cavity includes a trailing wall that separates the cavity from the trailing surface. The locking element is disposed in the cavity such that part of the locking element is visible through an access opening in the trailing wall so that the locking element may be rotated from outside of the implant. In a first rotational position, a first part of the locking element is located within one of the first and second passageways and in a second rotational position, the first part of the locking element is inside the body covered by the trailing wall.

Claims20

Dependent claims

An intervertebral implant comprising:

an implant body comprising:
a leading surface and a trailing surface opposite the leading surface;
first and second passageways through the implant body, each passageway sized for the disposal of a bone fastener therein;
and
a cavity within the implant body, the cavity being in between the first and second passageways and defined by a plurality of internal walls, the plurality of internal walls including a trailing wall separating the cavity from the trailing surface of the implant body, and
a fastener blocker including a head with a screw drive, the fastener blocker disposed in the cavity such that less than an entirety of a trailing surface of the head is visible through an access opening in the trailing wall, the fastener blocker being rotatable about its center through actuation of the screw drive such that in a first rotational position, a first part of the trailing surface of the head is located within one of the first and second passageways and in a second rotational position, the first part of the trailing surface of the head is inside the implant body covered by the trailing surface of the implant body.

3 more elements

An intervertebral implant comprising:

a monolithic implant body comprising:
a leading surface and a trailing surface opposite the leading surface;
a superior surface and an inferior surface opposite the superior surface;
a first protruding part on the inferior surface or the superior surface, the first protruding part defining a first portion of a first fastener opening, wherein the first fastener opening is sized for receipt of a bone fastener, the first fastener opening extending from the trailing surface to the inferior surface or the superior surface;
a central opening extending into the monolithic implant body from the trailing surface;
and
a fastener blocker disposable in the central opening of the monolithic implant body, the fastener blocker including a head and a shaft extending from the head, the shaft including a flexible portion with a protrusion or recess thereon for engagement with a complementary recess or protrusion on the monolithic implant body within the central opening,
wherein when the fastener blocker is engaged to the monolithic implant body, the fastener blocker is rotatable into a first rotational position where a second portion of the first fastener opening is covered by a part of the fastener blocker and a second rotational position where the opening is unobstructed by the fastener blocker, and
wherein when the protrusion or recess on the flexible portion of the shaft moves out of engagement with the complementary recess or protrusion on the monolithic implant body, the flexible portion bends toward a remainder of the shaft.

6 more elements

A spinal implant system comprising:

an intervertebral implant comprising:
a body with a leading surface and a trailing surface opposite the leading surface;
a first opening within the body sized for the disposal of a bone fastener therein, the first opening extending from the trailing surface to an inferior surface of the body or a superior surface of the body;
a second opening within the body, the second opening extending into the body from the trailing surface;
and
a hollow fastener blocker engaged to the body within the second opening, the hollow fastener blocker having a central longitudinal axis and the hollow fastener blocker being rotatable about the central longitudinal axis to block and unblock the first opening;
and
an insertion instrument comprising:
an outer shaft including a cannulated body and two longitudinally extending prongs extending from an end of the cannulated body, each prong having a reverse taper toward a respective free end;
an inner shaft axially translatable within the cannulated body;
and
a handle adapted to control axial translation of the inner shaft,
wherein when the two longitudinally extending prongs are within a hollow part of the hollow fastener blocker and the inner shaft is translated distally from a first position remote from the two longitudinally extending prongs to a second position in between the two longitudinally extending prongs, the two longitudinally extending prongs become further apart and become engaged to the fastener blocker.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/019,912Filed 14 Sep 2020 · us provisional application
Priority: 16 Sep 2019
Published: US 2021/0077268 A118 Mar 2021
Granted: 27 Dec 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification26 codes

A61B 17/8042
Having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges…:…
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient
A61F 2/30771
Special external or bone-contacting surface, e.g. coating for improving bone ingrowth: applied in original prostheses, e.g. holes or grooves
A61F 2/3094
Joints: designing or manufacturing processes