Abstract: Abstract：Objective To explore the clinical effect of implant restoration in reconstruction of alveolar bone deficiency with autogenous block graft. Methods From January 2010 to December 2016, 30 cases of reconstruction of alveolar bone deficiency with autogenous block graft and Guided Bone Regeneration (GBR) were included. A total of 81 implants were divided into two groups according to the different donor site of autogenous block graft. Mandible group performed 14 cases of 47 implants, and ilium group contained 14 cases of 47 implants. By clinical follow-up and radiographic examination, survival rates of implants were calculated and compared. Results 30 cases of autogenous block graft combined with GBR significantly increased the bone volume after spontaneous healing, no significant complications of donor site were detected after surgery. After an average of 7.8 months (4-18 months) of the osseointegration period with simultaneous or delayed implant surgery, excepting one case failure because of the loose implant, the remaining 29 cases were restored with ceramic crowns or bridges. After 26 months (range 9 to 68 months) of the mean follow-up period, the total survival rate was 98.76% in 81 implants. Survival rate was 97.06% in the mandible group including one case failed，while the survival rate of the ilium group was 100% .There was no statistically significant difference between the two groups (P> 0.05). Conclusions Combined with autogenous block graft, the implant survival rate had no significant difference compared with no grafts in conventional condition.Moreover, both mandible and ilium procedures were predictable for the reconstruction of alveolar bone deficiency. However, mandible harvesting could be a preference in clinical procedures due to the advantages of avoiding the second field, reducing the operation time and few postoperative complications.

Key words: autogenous block graft, alveolar bone deficiency, implant survival rate