Stacking implants for spinal fusion

摘要

Disclosed is a system for inducing fusion of vertebrae, comprising: a plurality of stacking inserts for placement in an intervertebral space, each insert comprising a composite consisting essentially of bone fragments embedded in a biocompatible polymer, the composite having osteogenic properties, wherein a subset of said plurality of stacking inserts may be selected to fit the dimensions of the intervertebral space. Also disclosed is the use of a composite consisting essentially of bone fragments embedded in a biocompatible polymer, the composite having osteogenic properties, in the manufacture of a plurality of stackable inserts for fusing adjacent vertebrae, wherein the plurality of inserts, when inserted into an intervertebral space, together match the size and shape of the intervertebral space.