Patent ID: 8470040
Filing Date: 2013-06-25
Classification: A61F,A61L

Abstract:
1. An implant device for implantation within an intervertebral space between adjacent vertebrae, the implant device comprising: an implant body extending along a posterior-to-anterior axis from a posterior wall portion thereof to an anterior wall portion thereof and comprising a material selected from the group consisting of densified nanocrystalline hydroxyapatite, densified nanocrystalline tricalcium phosphate, and combinations thereof; an annular wall of the implant body having an inner annular surface extending about an inner void, an outer annular surface, and upper and lower vertebral engaging portions, with both the inner annular surface and the outer annular surface extending continuously without interruption between the upper and lower vertebral engaging portions so that the inner and outer annular surfaces lack any openings, channels or sharp corners; asymmetrical gripping structures of the upper and lower vertebral engaging portions comprising a plurality of alternating peaks and troughs, with each of the peaks having a convexly curved summit without sharp edges and each of the troughs having a concavely curved base; a leading portion of each of the gripping structures having a flat surface extending between the convexly curved summit and the concavely curved base; and a trailing portion of each of the gripping structures comprising a bi-directionally continuously curved surface extending between and including the convexly curved summit and concavely curved base and configured so that the continuously curved surface is inclined from the summit to the base relative to the posterior-to-anterior axis.