Success Rate and Complications of Single Immediate Implants in Different Dental Regions: A Clinical Study

Objectives: This study aimed to evaluate the long-term success and complication profile of single immediate implants (IIP), focusing on biological, technical, and aesthetic outcomes over a minimum follow-up of 36 months. The study further sought to determine the predictability of immediate implant placement in both anterior and posterior regions. Methods: A retrospective analysis was conducted on 324 patients who received single immediate implants at Seeklinik Zürich between May 2018 and May 2022. A standardized data collection protocol recorded clinical parameters including soft tissue health, implant stability, and aesthetic outcomes. Complications were categorized as biological, technical, or aesthetic, and their incidence and impact on implant success were systematically analyzed. Statistical comparisons were performed to assess differences between anterior and posterior implant sites. Results: Over a mean follow-up of 36 months, single immediate implants demonstrated high success rates. Aesthetic complications were observed in 14 cases (4.32%), technical complications in 5 cases (1.54%), and biological complications in 4 cases (1.23%). No significant differences in complication rates were noted between anterior and posterior regions (p > 0.05). Soft tissue parameters remained stable, and patient-reported aesthetic satisfaction was consistently high. Conclusion: Single immediate implants exhibit predictable clinical outcomes with minimal complications and high aesthetic success over a three-year period. The findings support immediate implant placement as a reliable treatment option for single-tooth restorations in both anterior and posterior regions. Clinical significance: Immediate implant placement provides a safe, efficient, and aesthetically favorable approach to single-tooth replacement, offering high patient satisfaction and low complication rates, thereby supporting its routine use in contemporary clinical practice. Keywords: dental implant; immediate placement; success rate; complications; aesthetic outcome; single-tooth restoration; clinical study