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Single Implant Retained Overdenture Treatment Protocol: A Systematic Review and Meta-Analysis
Harini Padmanabhan1, S Madhan Kumar1, V Anand Kumar1
1Department of Prosthodontics, Crown & Bridge, Sri Ramachandra Institute of Higher Education and Research, Chennai, India.
Summary
This systematic review found that single implant-retained overdentures offer a successful treatment for edentulous mandibles, with high implant survival rates and minimal complications. Delayed loading protocols showed the greatest survival rates for implants.
Area of Science:
- Dental Implantology
- Prosthodontics
- Systematic Review and Meta-Analysis
Background:
- Edentulous mandibles present functional and aesthetic challenges.
- Single implant-retained overdentures offer a minimally invasive solution for mandibular rehabilitation.
Purpose of the Study:
- To determine the optimal surgical and prosthetic protocols for single implant-retained overdentures in edentulous mandibles.
- To evaluate implant and prosthesis survival and complication rates.
Main Methods:
- A systematic literature search was conducted across multiple databases (PubMed, ScienceDirect, COCHRANE, etc.).
- Included English articles with a minimum 1-year follow-up for meta-analysis.
- Poisson regression model used to estimate survival rates.
Main Results:
- 17 studies were selected, with 11 undergoing meta-analysis.
- Estimated 5- and 10-year implant survival rates were 91.93% and 84.62%.
- Delayed loading showed highest survival; immediately loaded implants had better survival than early loaded implants. Ball abutments had more fractures, while locator abutments had more maintenance events.
Conclusions:
- Single implant-retained overdentures are cost-effective, minimally invasive, and effective for restoring function and aesthetics.
- This treatment offers high success rates for implants and prostheses with few complications.

