Follow-Up of Dental Implants placed in Onlay Bone Graft

Method: A retrospective study was conducted on 250 patients' files (mean age at OBG surgery 50.3±15.5, 179 females) who received a total of 727 dental implants placed in 262 augmentations using OBG from 1999 to 2010. All the augmentations and implant placement procedures were performed by a single surgeon (DSA), and all the bone blocks were of intra oral origin (mandibular ramus and symphesis). Follow up time was up to 140 months (mean follow up time 44.4±34.9 months).

Result: File data indicated that 254 OBG were successful (96.9%). Bone graft exposure was shown to be moderately associated with bone graft failure (χ²=3.76, p=0.052). Dental implants placed in OBG showed a success rate of 93.7%, with most failures (78.2%) occurring at the prosthetic phase. significant differences in implant success rates were noted between genders, posterior and anterior portions of the maxilla and mandible and augmentation dimensions.

Conclusion: These results suggest that implants placed in OBG are highly predictable.