Intervertebral implant

Patent metadata

Field	Value
Publication number	US-9610174-B2
Application number	US-201414335251-A
Country	US
Kind code	B2
Filing date	Jul 18, 2014
Priority date	Nov 29, 2013
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

An intervertebral implant is a porous structure formed of a plurality of metal balls, and the intervertebral implant includes a bone support area and a bone growth area. The bone support area and the bone growth area each have a plurality of connecting holes, and a porosity of the bone support area is smaller than that of the bone growth area.

First claim

What is claimed is:

1. An intervertebral implant, being a porous structure formed of a first plurality of metal balls and a second plurality of metal balls, comprising:
a bone support area; and
a bone growth area;
wherein the bone support area and the bone growth area each have a plurality of connecting holes, and a porosity of the bone support area is smaller than that of the bone growth area;
wherein the bone support area and the bone growth area have an elastic modulus between 0.17 GPa and 30 GPa;
wherein the bone support area is comprised of the first plurality of metal balls and each metal ball of the first plurality of metal balls has a first particle diameter, and the bone growth area is comprised of the second plurality of metal balls and each metal ball of the second plurality of metal balls has a second particle diameter; and
wherein the first particle diameter is different from the second particle diameter.

2. The intervertebral implant according to claim 1 , wherein the porous structure is formed of the first plurality of metal balls and the second plurality of metal balls obtained by performing vacuum sintering on a plurality of metal powder particles mixed with a pore-making agent.

3. The intervertebral implant according to claim 2 , wherein when the plurality of metal powder particles and the pore-making agent are mixed, a weight percentage of the pore-making agent is between 1 wt % and 70 wt %.

4. The intervertebral implant according to claim 1 , wherein the first plurality of metal balls and the second plurality of metal balls have a particle diameter between 10 μm and 100 μm.

5. The intervertebral implant according to claim 1 , wherein the plurality of connecting holes each has a pore diameter size between 50 μm and 500 μm.

6. The intervertebral implant according to claim 1 , wherein the bone support area and the bone growth area each have a porosity between 10% and 90%.

7. The intervertebral implant according to claim 1 , wherein pores of the porous structure are evenly distributed.

Assignees

• Metal Ind Research&Development Centre
• Metal Ind Res & Dev Ct

Inventors

• Wang Wei-Ching
• Chen Yen-Nien
• Sue Tzyy-Ker
• Wang For-Son
• Shih Wei-Jen
• Chen Wei-Te

Classifications

• A61F2002/30593

  hollow · CPC title

• A61F2/447 Primary

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61L27/56

  Porous materials, {e.g. foams or sponges} · CPC title

• B22F7/06

  of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} · CPC title

• A61F2310/00023

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