Factors Affecting Survival of Maxillary Sinus Augmented Implants

In, Yeon Soo; Park, Young Wook

Abstract

PURPOSE
The aim of this study was to present the clinical results of maxillary sinus augmentation implants and to evaluate the effects of various factors on the implant survival rate.
METHODS
In a total of 112 patients, 293 implants after sinus augmentation were performed. The total survival rate and the influence of the following factors on implant survival were evaluated; patient characteristics (sex, age, smoking, general disease), graft material, implant surface, implant installation stage, site of implant placement, length and width of implant, closure method for osseous window, residual alveolar bone height.
RESULTS
1. Age ranged from 16 to 70 yr, with a mean of 45.7 yr. 2. Cumulative survival rate for the 293 implants with the maxillary sinus augmentation procedure was 94.9%. 3. Simultaneous implant installation was performed in 122 patients and delayed implant installation was performed in 117 implants. The average healing period after sinus elevation was 7.3 months for delayed implant installation and this procedure had a significantly higher survival rate. 4. There were no significant differences in sex, age, smoking, general disease, site of implant placement, length and width of implant, residual alveolar bone height and the survival rate. 5. RBM (Resorbable Blasting Media) implant surface and allograft groups had significantly lower survival rates.
CONCLUSION
These data suggest that maxillary sinus augmentation may give more predictable results for autogenous bone grafts and delayed implant placement.