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Extraction site preservation using new graft material that combines mineralized and demineralized allograft bone: a case series report with histology.

This retrospective case series reports on the use of a new allograft bone product composed of a 70 to 30 ratio of mineralized to demineralized cortical bone particles to preserve the alveolar ridge dimensions of patients requiring tooth extraction with plans for future dental implant placement. Ten patients received atraumatic tooth extractions with subsequent placement of the blended bone allograft. All sites were covered with a single layer of amnion-chorion, which was intentionally left exposed. After an average healing time of 14 weeks, the surgical sites were accessed for placement of dental implants. Prior to implant placement, trephine core samples were taken for histologic analysis. Dental implants were successfully placed in all previously grafted surgical sites; no sites required any additional bone augmentation. Histologic analysis of trephined bone core samples revealed bone compositions similar to those described in previously published site preservation studies. The results of this case series suggest that blended bone allograft containing a 70 to 30 ratio of mineralized to demineralized cortical bone particles can be successfully used to facilitate future placement of dental implants with as little as 14 weeks of healing.