Efficacy of cancellous block allograft augmentation prior to implant placement in the posterior XXXX mandible.

@entity1 @entity604 @entity3202
BACKGROUND: The present study evaluated the outcome of ridge augmentation with cancellous freeze-dried block bone allografts in the posterior @entity3202 mandible followed by placement of dental implants. MATERIALS AND METHODS: A bony deficiency of at least 3 mm, horizontally, vertically, or both, according to computerized tomography (CT) para-axial reconstruction served as inclusion criteria. Implants were inserted after a healing period of 6 months. Bone measurements were taken prior to bone augmentation, during implant placement, and at second-stage surgery. Marginal @entity604 and crown-to-implant ratio were also measured. RESULTS: Twenty-nine cancellous allogeneic bone blocks were placed in 21 @entity1 . The mean follow-up was 37 months. Bone block survival rate was 79.3%. Mean horizontal and vertical bone gains were 5.6 and 4.3 mm, respectively. Mean buccal bone resorption was 0.5 mm at implant placement and 0.2 mm at second-stage surgery. A total of 85 implants were placed. Mean bone thickness buccal to the implant neck was 2.5 mm at implant placement and 2.3 mm at second-stage surgery. There was no evidence of vertical @entity604 between implant placement and second-stage surgery. Implant survival rate was 95.3%. All @entity1 received a fixed implant-supported prosthesis. At the last follow-up, the mean marginal @entity604 was 0.5 mm. The mean crown-to-implant ratio was 0.96. CONCLUSION: Implant placement in the posterior @entity3202 mandible following augmentation with cancellous freeze-dried bone block allografts may be regarded as a viable treatment alternative.
