After mineralization, allograft particles were never resorbed. They were exfoliated. Histologic studies that have evaluated extraction sockets grafted with mineralized freeze-dried bone allografts have found that the percentage of retained bone graft particles never changes across different time points, indicating that these materials are never resorbed. However, it is commonly accepted and professed by clinicians that these materials are indeed resorbed and convert the graft site into normal bone. This histologic study was undertaken to determine the actual fate of mineralized freeze-dried bone allograft particles grafted into human extraction sockets.
The crest of the graft site for #19 contained loose cadaver bone graft particles in granulation tissue for 10 years.