Stability of implants placed at sites treated with bone allograft

Objective: A retrospective chart review was performed to assess the stability of implants in a variety of clinical situations, including placement at sites with a history of bone augmentation using bone allograft. Methods: The study included 286 implants placed by an experienced practitioner and by Graduate Periodontics residents at the University of British Columbia. Implants included a variety of Nobel Biocare, Straumann, and Astra Tech designs. The Osstell ISQ device was used to measure implant stability (RFA) by emitting magnetic pulses that cause a SmartPeg attached to the implant to resonate according to the stability of the implant. Results were displayed in Implant Stability Quotient (ISQ) units and were recorded in triplicate, from the buccal, lingual, mesial, and distal. Measurements obtained at second surgery were compared with factors related to bone grafting, as well as patient demographics, implant site, and physical implant characteristics (significance p