US 11,298,931 B2Granted

Intervertebral disc replacement

AssigneeAgada Medical Ltd.

InventorsAmnon Yadin, Isador Harry Lieberman, Adi Dagan, Yoram Fleischmann

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Abstract

According to some embodiments of the invention, an intervertebral disc replacement includes a first layer having a lower surface for contacting a first vertebral bone, a second layer coupled to the first layer, the second layer comprising a plurality of compressible column springs, and a third layer coupled to the second layer, the third layer having an upper surface for contacting a second vertebral bone. Each of the plurality of compressible column springs comprises a plurality of stacked coils, and each of the plurality of stacked coils has a spring constant (K). At least one of the plurality of compressible column springs includes a first coil having a first spring constant and a second coil comprising a second spring constant, wherein the first spring constant is different from the second spring constant.

Claims19

Dependent claims

A method of producing a patient-specific intervertebral disc replacement comprising a plurality of compressible springs, the method comprising the steps:

a) obtaining data for a patient, the data comprising at least one of x-ray data, magnetic resonance imaging (MRI) data, computed tomography (CT) data, and the patient's body mass above the intervertebral disc replacement;
b) determining a position of each compressible spring of the plurality of compressible springs and at least one spring constant of each compressible spring of the plurality of compressible springs, after step a), based on the obtained data to match patient-specific level positioning and movement needs;
c) forming, using a powder-based 3D printer, after step b), a first portion of the intervertebral disc replacement, the first portion having a first surface for contacting a first vertebral bone;
d) forming, using the powder-based 3D printer, after step c), on top of the first portion, a second portion comprising the plurality of compressible springs having the determined positions and the determined spring constants;
e) forming, using the powder-based 3D printer, after step d), a third portion on top of the second portion, the third portion having a second surface for contacting a second vertebral bone;
and
f) removing, after step e), unbound powder from the plurality of compressible springs.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/506,504Filed 9 Jul 2019 · continuation
Priority: 24 Nov 2015
Published: US 2019/0329544 A131 Oct 2019
Granted: 12 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

B29C 64/153
Using only solid materials: using layers of powder being selectively joined, e.g. by selective laser sintering or melting
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient
A61F 2/4425
Intervertebral or spinal discs, e.g. resilient: made of articulated components
B33Y 80/00
Products made by additive manufacturing

Family

Application62/259,540Us provisional application · filed 24 Nov 2015
Application15/234,923Parent of this continuation · filed 11 Aug 2016
US 2019/0329544 A1Pre-grant publication · published 31 Oct 2019
US 10,390,959 B2Parent of this continuation
US 2017/0143502 A1Published application
US 11,298,931 B2This patent

From the US filing history. Foreign family members aren’t listed.