. BioOss, A, is a porous bone mineral matrix xenograft prepared from bovine sources; Pepgen P-15, B, combines an organic component—a synthetically manufactured amino acid sequence (P-15) designed to elicit cell bonding, with an inorganic calcium-phosphate matrix that acts as a carrier for the amino acid sequence and a scaffold for bone growth. (Courtesy of Mitchell JC, OHSU School of Dentistry, Port