Callos Bone Void Filler is a synthetic calcium phosphate cement. It offers high compressive support for host bone that has been compromised. Synthetic calcium phosphates form a scaffold to allow bony ingrowth to occur through a cell-mediated remodeling process. In the cell-mediated remodeling process whereby host bone gradually replaces the synthetic calcium phosphate along with adjacent bone. Callos Bone Void Filler exhibits high compressive strength throughout the remodeling process.