MULTI-DENSITY POLYMERIC INTERBODY SPACER AND METHOD FOR FABRICATION THEREOF

WIPO Patent Application WO/2011/008733

A3

A multi-density polymeric interbody spacer formed from biocompatible material for osteoconductivity includes multiple density regions of different porosity to provide both strength and osteoconductivity. An interface region is formed between the density regions to provide both direct adhesion and mechanical interlocking between the different density regions to increase the strength of the multi-density polymeric interbody spacer. A method for forming the multi-density polymeric interbody spacer includes curing a first density region to achieve a first target porosity. A second density region may then be molded to the first density region to achieve a second target porosity. A portion of the second density region partially flows into pores of the first density region, providing direct adhesion and mechanical interlocking between the first and second density regions.

DESLAURIERS M D RICHARD J (US)
JANNETTY JOSEPH (US)
KOLB ERIC (US)
TOMICH JOHN A (US)
AKKARAPAKA NARESH (US)

PCT/US2010/041790

July 07, 2011

July 13, 2010

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DOCTORS RES GROUP INC (US)
DESLAURIERS M D RICHARD J (US)
JANNETTY JOSEPH (US)
KOLB ERIC (US)
TOMICH JOHN A (US)
AKKARAPAKA NARESH (US)

A61L27/56; A61F2/28; A61L27/14; A61L27/54; B29C39/18

US6149688A	2000-11-21
US20090043398A1	2009-02-12
US20050228498A1	2005-10-13
US20030004578A1	2003-01-02
US5702449A	1997-12-30
US20040249462A1	2004-12-09
US6482234B1	2002-11-19
US5607474A	1997-03-04

CUNNINGHAM, Marina, F., (Paulding & Huber LLP185 Asylum Street,CityPlace I, Hartford CT, US)

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