Premium
Cancellous Bone Block Allografts for the Augmentation of the Anterior Atrophic Maxilla
Author(s) -
Nissan Joseph,
Mardinger Ofer,
Calderon Shlomo,
Romanos George E.,
Chaushu Gavriel
Publication year - 2011
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/j.1708-8208.2009.00193.x
Subject(s) - medicine , implant , dentistry , cancellous bone , maxilla , bone grafting , dental implant , prosthesis , bone resorption , surgery
Background: Pre‐implant augmentative surgery is a prerequisite in many cases in the anterior maxilla to achieve a stable, long‐term esthetic final result. Purpose: The aim of the present study was to evaluate the outcome of ridge augmentation with cancellous freeze‐dried block bone allografts in the anterior atrophic maxilla followed by placement of dental implants. Materials and Methods: Thirty‐one consecutive patients were included in the study. A bony deficiency of at least 3 mm horizontally and up to 3 mm vertically according to computerized tomography (CT) served as inclusion criteria. Sixty‐three implants were inserted after a healing period of 6 months. Nineteen of sixty‐three implants were immediately restored. Bone measurements were taken prior to bone augmentation, during implant placement, and at second‐stage surgery. Results: Forty‐six cancellous allogeneic bone blocks were used. The mean follow‐up was 34 ± 16 months. Mean bone gain was 5 ± 0.5 mm horizontally, and 2 ± 0.5 mm vertically. Mean buccal bone resorption was 0.5 ± 0.5 mm at implant placement, and 0.2 ± 0.2 mm at second‐stage surgery. Mean bone thickness buccal to the implant neck was 2.5 ± 0.5 mm at implant placement, and 2.3 ± 0.2 mm at second‐stage surgery. There was no evidence of vertical bone loss between implant placement and second‐stage surgery. Block and implant survival rates were 95.6 and 98%, respectively. All patients received a fixed implant‐supported prosthesis. Conclusion: Cancellous block allografts appear to hold promise for grafting the anterior atrophic maxilla.