This document provides information on Pro Osteon, a bone graft substitute product offered by Biomet. It describes the various forms of Pro Osteon, including blocks and granules in resorbable and non-resorbable varieties. Pro Osteon is a porous, hydroxyapatite matrix that is osteoconductive and has a structure and chemistry similar to human bone. It has been used in over 1 million procedures since 1982 to fill bony defects and aid fusion. Pro Osteon is available in different sizes to suit small and large defects and can be combined with autograft or allograft.