Allograft in Dentistry
Using processed human donor bone for dental bone grafting.
Dental allografts use processed bone obtained from human cadaver donors through tissue banks. The bone undergoes rigorous screening, processing, and sterilization to ensure safety while preserving biological properties. Available forms include demineralized bone matrix (DBM), freeze-dried bone allograft (FDBA), and demineralized freeze-dried bone allograft (DFDBA). DFDBA is particularly valued because the demineralization process exposes bone morphogenetic proteins (BMPs), providing osteoinductive properties in addition to osteoconduction. FDBA retains its mineral content and provides better structural support for load-bearing applications. Both forms are available as particulate, putty, gel, strips, and blocks to suit various clinical needs. Allografts eliminate the need for a second surgical donor site, reduce operative time, and provide unlimited quantity. They are widely used for socket preservation after tooth extraction, sinus lifts, ridge augmentation, and periodontal defect filling. Safety concerns regarding disease transmission are addressed through stringent processing protocols, with the estimated risk being extremely low (less than one in a million for HIV and hepatitis).