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Article Abstract
Purpose: The objective of present study was to assess the dimensional stability of the grafting material DBBM (Bio-oss) after maxillary sinus floor augmentation with spiral computed tomography (SCT) scans and 3D reconstruction.
Methods: Two postoperative SCT scans were available from 12 patients who had undergone maxillary sinus lift procedures. CT scan was taken at 2 week after surgical intervention and 6 months later, respectively. A total of 12 maxillary sinuses were augmented with 100% DBBM before implant insertion by lateral antrostomy in a staged approach. The augmentation volume was calculated using the SurgiCase CMF5.0 software. Data were calculated by Stata10 software package.
Results: The mean volume of the graft was reduced by 19.40%. Specifically, the reduction reached 0.29% in the buccal-palatal direction, 5.87% in the mesial-distal dimension, and 14.32% in vertical dimension.
Conclusions: This study confirmed that the volume of DBBM has a certain amount of reduction within 6 months after sinus floor augmentation. The reduction in vertical direction is most severe.
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