Abstract: A spinal cage insert for a spinal cage is provided. The spinal cage insert has a shape suitable to be inserted into and fit closely in an interior of the spinal cage. The insert may comprise a member of the calcium phosphate family. The spinal cage insert may be made to a desired shape of porous ceramic, and it may include channels and/or surface features. Various shapes of filler pieces are also provided, wherein the filler pieces may be suitable to augment external regions of vertebrae which have been fused to each other so as to promote build-up of bone. The spinal cage insert and/or the filler pieces may be osteoconductive and may also contain osteoinductive substances or material. The articles may also contain cavities suitable for containing particles of demineralized bone matrix (DBM). Methods of use and methods of manufacturing the spinal cage insert and filler pieces are also provided.