Interbody Implants and Optimization Features Thereof

Patent metadata

Field	Value
Publication number	US-2025195234-A1
Application number	US-202519064057-A
Country	US
Kind code	A1
Filing date	Feb 26, 2025
Priority date	Aug 9, 2018
Publication date	Jun 19, 2025
Grant date	—

Abstract

A method of making a spinal implant may include obtaining images of a vertebra defining a disc space of a patient, identifying a number of porous sections in an implant for implantation in the disc space, and producing the implant including the identified number of porous sections.

First claim

1 . A method of making a spinal implant comprising:
obtaining images of a vertebra defining a disc space of a patient; identifying a number of porous sections in an implant for implantation in the disc space; and producing the implant including the identified number of porous sections.

2 . The method of claim 1 , wherein producing the implant includes additive manufacturing the implant.

3 . The method of claim 1 , wherein each porous section includes a plurality of adjoined cells comprising a plurality of interconnected struts defining a plurality of pores, wherein a target strain of each strut ranges from 1000 to 1800 micro strain.

4 . The method of claim 3 , further comprising identifying an expected load of the patient, and wherein the identifying the number of porous sections step includes identifying the number of porous sections to reach the target strain based on the expected load of the patient.

5 . The method of claim 3 , further comprising identifying a length and a cross-sectional area of each strut configured to reach the target strain.

6 . The method of claim 3 , further comprising identifying a total number of struts in each of the plurality of adjoined cells to reach the target strain.

7 . The method of claim 3 , further comprising identifying a shape or a geometry of each of plurality of adjoined cells to reach the target strain.

8 . The method of claim 3 , further comprising identifying a cross-sectional shape of each strut to reach the target strain.

9 . The method of claim 3 , further comprising identifying an angulation of intersection between two or more struts to reach the target strain.

10 . The method of claim 3 , further comprising identifying a location of connection between two or more struts to reach the target strain.

11 . The method of claim 1 , further comprising identifying a shape of each porous section for an intended implantation location of the spinal implant.

12 . The method of claim 11 , wherein the intended implantation location is within a lumbar spine.

13 . The method of claim 1 , wherein the identifying a number of porous sections step includes use of computer-aided software or topology optimization tools.

14 . The method of claim 1 , wherein each porous section has a different porosity than an adjacent section.

15 . The method of claim 1 , wherein the porous sections increase in porosity toward a center of the implant.

16 . A method of making a spinal implant comprising:
obtaining information of a vertebra defining a disc space of a patient corresponding to a population within a bone database; identifying a number of porous sections in an implant for implantation in the disc space; and producing the implant including the identified number of porous sections.

17 . The method of claim 16 , wherein producing the implant includes additive manufacturing the implant.

18 . The method of claim 16 , wherein each porous section includes a plurality of adjoined cells comprising a plurality of interconnected struts defining a plurality of pores, and
wherein a target strain of each strut ranges from 1000 to 1800 micro strain, and further comprising identifying at least one of a length and a cross-sectional area of each strut, a total number of struts in each of plurality of adjoined cells, a shape or a geometry of each of plurality of adjoined cells, a cross-sectional shape of each strut, an angulation of intersection between two or more struts, or a location of connection between two or more struts to reach the target strain.

19 . A method of making a spinal implant comprising:
obtaining images of a vertebra defining a disc space of a patient; identifying an expected load; determining a porosity of an implant based on the expected load, wherein the porosity in a portion section includes a plurality of adjoined cells comprising a plurality of interconnected struts defining a plurality of pores, and wherein determining the porosity includes identifying at least one of a length and a cross-sectional area of each strut, a total number of struts in each of plurality of adjoined cells, a shape or a geometry of each of plurality of adjoined cells, a cross-sectional shape of each strut, an angulation of intersection between two or more struts, or a location of connection between two or more struts; and producing the implant based on the determined porosity.

20 . The method of claim 19 , wherein producing the implant includes additive manufacturing the implant.

Assignees

• Stryker European Operations Holdings Llc

Inventors

• Newman Collin
• Schultz Christian
• Willis Seven
• Sharifi-Mehr Amir A
• Buchert Oliver
• Bell Christopher
• Ehlers Andrew
• Reza Annie
• Long Marc
• Robinson Joseph

Classifications

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title

• A61F2250/0018

  differing in elasticity, stiffness or compressibility · CPC title

• A61F2002/4629

  connected to the endoprosthesis or implant via a threaded connection · CPC title

• A61F2002/2835

  Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material · CPC title

• A61F2/4611

  of spinal prostheses · CPC title