Success rate of dental implants placed in sites with staged autogenous bone block grafts versus pristine bone:...

The aim of this study was to evaluate the long-term success rates of dental implants placed in pristine bone (PB) compared to those placed in sites with staged autogenous bone augmentation (ABA) over a 10-year follow-up. A retrospective study was conducted on 144 patients treated between 2012 and 2014. Patients were divided into two groups: PB or ABA. Clinical parameters including pain, mobility, exudation, and radiographic peri-implant bone loss were assessed. A total of 260 implants were evaluated, with 137 implants in the PB group and 123 in the ABA group. The mean follow-ups were 124.2 and 123.8 months, respectively. No significant difference was found between the two groups in terms of pain, mobility, and exudate. Marginal bone loss was significantly greater in the ABA group (1.5 mm) compared to the PB group (1.4 mm) (P = 0.014). The cumulative implant success rate at 10 years was 90.2% for ABA and 95.6% for PB, with no statistically significant difference between groups (P = 0.140). Within the ABA group, implants in horizontally augmented sites demonstrated a significantly higher success rate (98.9%) compared to those in vertically augmented sites (65%) (P < 0.001). Implants in vertically augmented sites exhibited greater bone loss (1.8 mm) compared to horizontally augmented sites (1.5 mm) (P = 0.018). Long-term success rates of implants in augmented sites were consistent with those in pristine bone. Further studies with standardized parameters are needed to identify factors influencing clinical outcomes.