OsseoSeal Mineralized Allograft Cortical/Cancellous, 250-1000um [2.5cc]OsseoSeal ExoGraft Allograft Cortical Cancellous is a Freeze Dried Bone Allograft (FDBA) composed of cortical and cancellous bone. It has optimized porosity of cancellous bone and compactness of cortical bone to provide the best optimal scaffold and structural support for new bone formation. Our Allograft have been processed and sterilized to the highest standards and quality set forth by both American Association of Tissue Banks (AATB) and FDA.