Intervertebral Spacer

Abstract

An interbody spacer for insertion between vertebral members. The spacer includes a body having posterior and anterior sides, and inferior and superior faces. The spacer further includes a plurality of teeth to maintain the position of the spacer between the vertebral members. The teeth are aligned in a pattern and have a shape to allow insertion into the space between the vertebral members, and prevent or limit movement once the spacer is positioned in the space.

1 . An interbody spacer comprising:
 a member having first and second faces;   a plurality of first pathways on the first face each extending at an oblique angle relative to a longitudinal centerline of the spacer and a plurality of second pathways on the first face each extending at a mirrored angle relative to the longitudinal centerline, the longitudinal centerline extending through anterior and posterior sides of the member, each of the plurality of first and second pathways being straight;   teeth extending outward from the first face between the plurality of first and second pathways, each of the teeth including at least one straight side that is parallel with an adjacent one of the plurality of the first pathways and at least a second straight side that is parallel with an adjacent one of the plurality of the second pathways.   
     
     
         2 . The interbody spacer of  claim 1 , wherein each of the teeth include a rectangular shape. 
     
     
         3 . The interbody spacer of  claim 1 , wherein each of the straight sides of the teeth are aligned towards the anterior side of the member. 
     
     
         4 . The interbody spacer of  claim 1 , wherein each of the teeth are capped with a relatively flat surface. 
     
     
         5 . The interbody spacer of  claim 1 , wherein the first plurality of pathways extend on the first face at an angle of about 45° relative to the longitudinal centerline, and the second plurality of pathways extend on the first face at an angle of about −45° relative to the longitudinal centerline. 
     
     
         6 . The interbody spacer of  claim 1 , wherein the oblique angle is an acute angle relative to the longitudinal centerline. 
     
     
         7 . The interbody spacer of  claim 1 , further comprising a second plurality of teeth extending outward from the second face. 
     
     
         8 . An interbody spacer comprising:
 a body with opposing first and second faces and opposing anterior and posterior sides that extend between the first and second faces;   a plurality of teeth on the first face, each of the plurality of teeth having a rectangular shape;   first and second angled pathways positioned between each of the plurality of teeth, the first pathways oriented at an acute angle relative to a longitudinal centerline extending through the anterior and posterior sides, and the second pathways oriented at a mirrored acute angle relative to the longitudinal centerline;   opposing first and second straight edges of each of the plurality of teeth being parallel with the first pathways and opposing third and fourth straight edges of each of the plurality of teeth being parallel with the second pathways.   
     
     
         9 . The interbody spacer of  claim 8 , wherein the acute angle is about 45° and the mirrored angle is about −45°. 
     
     
         10 . The interbody spacer of  claim 8 , wherein the plurality of teeth extend across a limited portion of the first face. 
     
     
         11 . The interbody spacer of  claim 8 , wherein each of the plurality of teeth have a square shape. 
     
     
         12 . The interbody spacer of  claim 8 , wherein the spacer has an annular shape with a central opening. 
     
     
         13 . The interbody spacer of  claim 12 , wherein the spacer has a D-shape with the anterior side being curved and the posterior side being substantially straight. 
     
     
         14 . The interbody spacer of  claim 8 , wherein each of the plurality of teeth are capped with a relatively flat surface. 
     
     
         15 . An interbody spacer comprising:
 a body having anterior and posterior sides, and first and second faces;   teeth on the first face of the body, each of the teeth being substantially rectangular in shape and having two anterior edges facing towards the anterior side and two posterior edges facing towards the posterior side, the teeth also including a relatively flat top;   the teeth aligned in a pattern of rows and columns, a center point of each of the teeth aligned in a first row being centered with a gap formed between each of said plurality of teeth in an adjacent second row, and the center point of each of said plurality of teeth in a first column being centered within the gap formed between each of said plurality of teeth in an adjacent second column, the rows and columns being substantially perpendicular to each other;   the columns each being parallel with a longitudinal centerline of the body and each of the rows being perpendicular to the longitudinal centerline of the body.   
     
     
         16 . The interbody spacer of  claim 15 , further comprising a plurality of first pathways on the first face each extending at an oblique angle relative to the longitudinal centerline, a plurality of second pathways on the first face each extending at a mirrored angle relative to the longitudinal centerline, each of the plurality of first and second pathways being straight. 
     
     
         17 . The interbody spacer of  claim 16 , wherein the first plurality of pathways extend on the first face at an angle of about 45° relative to the longitudinal centerline, and the second plurality of pathways extend on the first face at an angle of about −45° relative to the longitudinal centerline. 
     
     
         18 . The interbody spacer of  claim 15 , further comprising second teeth extending outward from the second face. 
     
     
         19 . The interbody spacer of  claim 15 , wherein each of the plurality of teeth have a square shape. 
     
     
         20 . The interbody spacer of  claim 15 , wherein the teeth extend across an entirety of the first face.