Bongros is made of highly pure, synthetic Hydroxyapatite (Ca10(PO4)6(OH)2). This product is supplied sterile in granules and preformed shapes for single patient use. Bongros has trabecular structure that resembles the 3-dimensional interconnected pore structure of human cancellous bone. When Bongros is placed in direct contact with viable bone, the reticulated spaces in the implant are infiltrated with hard tissue. Bone formation occurs in apposition to the Bongros surface and within the interstices of the implant skeleton.