US 8,845,736 B2Granted

Composite implant

AssigneeZimmer Spine, Inc.

InventorsKai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle

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Abstract

A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone in-growth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.

Claims20

Dependent claims

A composite vertebral implant for positioning between adjacent vertebrae, the composite vertebral implant comprising:

a polymeric body of a thermoplastic polymeric material positionable between adjacent vertebrae, the polymeric body including an upper surface configured to face a first vertebra and a lower surface configured to face a second vertebra;
a first porous metallic scaffold member defining a plurality of pores formed therein, the first porous metallic scaffold member having a first surface on a first side of the first porous metallic scaffold member and a second surface on a second side of the first porous metallic scaffold member;
a second porous metallic scaffold member defining a plurality of pores formed therein, the second porous metallic scaffold member having a first surface on a first side of the second porous metallic scaffold member and a second surface on a second side of the second porous metallic scaffold member;
wherein a portion of the pores of the first porous metallic scaffold member proximate the first surface of the first porous metallic scaffold member are filled with a portion of the thermoplastic polymeric material of the polymeric body;
wherein a portion of the pores of the second porous metallic scaffold member proximate the first surface of the second porous metallic scaffold member are filled with a portion of the thermoplastic polymeric material of the polymeric body;
wherein the second surface of the first porous metallic scaffold member is configured to be positioned against the first vertebra and promote bone in-growth into a portion of the pores of the first metallic scaffold member proximate the second surface of the first porous metallic scaffold member;
and
wherein the second surface of the second porous metallic scaffold member is configured to be positioned against the second vertebra and promote bone in-growth into a portion of the pores of the second metallic scaffold member proximate the second surface of the second porous metallic scaffold member.

5 more elements

A composite vertebral implant for positioning between adjacent vertebrae, the composite vertebral implant comprising:

a first annular-shaped body of a porous metal material partially defining a superior surface of the composite vertebral implant, the first body of porous metal material defining a plurality of pores formed by a metallic scaffold;
a second annular-shaped body of a porous metal material partially defining an inferior surface of the composite vertebral implant, the second body of porous metal material defining a plurality of pores formed by a metallic scaffold;
a polymeric body of a thermoplastic polymeric material positioned between the first annular-shaped body of porous metal material and the second annular-shaped body of porous metal material, the polymeric body having an upper surface partially defining the superior surface of the composite vertebral implant and a lower surface partially defining the inferior surface of the composite vertebral implant;
and
a cavity extending through the composite vertebral implant from the superior surface of the composite vertebral implant to the inferior surface of the composite vertebral implant, the cavity configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/871,295Filed 26 Apr 2013 · continuation
Priority: 23 Sep 2009
Published: US 2013/0116792 A122 Aug 2013
Granted: 30 Sep 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification35 codes

A61F 2/4465
For the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages: having a circular or kidney shaped…
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient
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.…
A61L 31/12
Materials for other surgical articles , e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention,…:…

Family

Application61/245,115Us provisional application · filed 23 Sep 2009
Application12/829,979Parent of this continuation · filed 2 Jul 2010
Application13/719,295Parent of this continuation · filed 19 Dec 2012
US 8,361,150 B2Parent of this continuation · filed 29 Jan 2013
US 2013/0218280 A1Pre-grant publication · published 22 Aug 2013
US 8,470,042 B2Parent of this continuation
US 2011/0071635 A1Published application
US 2013/0116792 A1Published application
US 8,845,736 B2This patent

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