Girish Galagali* and Nigama B

*Corresponding Author: Girish Galagali, MDS (Prosthodontics), Professor and Head of Department, Department of Prosthodontics, Navodaya Dental College, Raichur, Karnataka, India.

Received: May 14, 2026; Published: June 30, 2026

Dental implant therapy has become a predictable and evidence-based modality for the replacement of missing teeth, with long- term survival rates exceeding 90-95% reported in systematic reviews and meta-analyses. Despite high success rates, complications may arise during the osseointegration phase or following prosthetic loading, potentially compromising treatment outcomes and necessitating corrective intervention. Implant-related complications are broadly classified into two distinct categories: implant failure and prosthodontic failure. Implant failure involves biological disturbances affecting osseointegration and the bone-implant interface, resulting in implant mobility and loss of integration. Prosthodontic failure refers to mechanical or technical complications associated with the prosthetic superstructure while the implant fixture remains stable and osseointegrated. This narrative review discusses both failure categories from biological and mechanical perspectives, with emphasis on their etiology, diagnostic criteria, and evidence-based clinical management. Early implant failure results from disrupted osseointegration during the initial healing phase due to thermal injury, surgical trauma, infection, or insufficient primary stability. Late implant failure is most commonly driven by peri-implantitis, a plaque-associated destructive inflammatory process, as well as sustained occlusal overload and systemic risk factors including uncontrolled diabetes mellitus and tobacco smoking. Prosthodontic failures include screw loosening, abutment or framework fracture, and ceramic veneer chipping. These complications arise from mechanical fatigue, prosthetic misfit, excessive cantilever forces, and parafunctional loading, and are generally amenable to correction without removal of the implant fixture. The differential diagnosis integrates clinical mobility assessment, peri-implant probing, resonance frequency analysis, and standardised radiographic evaluation. Eight structured comparative and diagnostic tables are presented to support systematic, evidence-anchored clinical decision-making, including a four-step diagnostic decision algorithm and a comprehensive risk stratification framework. Management of biological implant failure follows the 2023 European Federation of Periodontology and American Academy of Periodontology clinical practice guidelines, encompassing stepwise non-surgical and surgical approaches. Prosthodontic failures are managed through targeted prosthetic repair and occlusal correction. Systematic pre-treatment risk stratification, meticulous surgical technique, evidence-based prosthetic design, and adherence to regular maintenance protocols are identified as the most effective determinants of long-term implant success. Accurate differentiation between biological and mechanical failure categories is essential for appropriate clinical decision-making and prevention of unnecessary surgical intervention.

Keyworda: Dental Implants; Implant Failure; Prosthodontic Complications; Peri-Implantitis; Osseointegration; Mechanical Complications

References

1. Albrektsson T., et al. "The Long-Term Efficacy of Currently Used Dental Implants: A Review and Proposed Criteria of Success”. International Journal of Oral and Maxillofacial Implants1 (1986): 11-25.
2. Goodacre CJ., et al. "Clinical Complications with Implants and Implant Prostheses”. Journal of Prosthetic Dentistry2 (2003): 121-132.
3. Esposito M., et al. "Biological Factors Contributing to Failures of Osseointegrated Oral Implants: (I). Success Criteria and Epidemiology”. European Journal of Oral Sciences1 (1998): 527-551.
4. Berglundh T., et al. "Peri-Implant Diseases and Conditions: Consensus Report of Workgroup 4 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions”. Journal of Clinical Periodontology20 (2018): S286-S291.
5. Pjetursson BE., et al. "A Systematic Review of the Survival and Complication Rates of Implant-Supported Fixed Dental Prostheses (FDPs) after a Mean Observation Period of at Least 5 Years”. Clinical Oral Implants Research6 (2012): 22-38.
6. Misch CE. “Contemporary Implant Dentistry”. 3^rd St. Louis: Mosby Elsevier, (2008).
7. Schwarz F., et al. "Peri-Implantitis”. Journal of Clinical Periodontology20 (2018): S246-S266.
8. Brånemark PI., et al. "Osseointegrated Implants in the Treatment of the Edentulous Jaw: Experience from a 10-Year Period”. Scandinavian Journal of Plastic and Reconstructive Surgery Supplement 16 (1977): 1-132.
9. Derks J and C Tomasi. "Peri-Implant Health and Disease: A Systematic Review of Current Epidemiology”. Journal of Clinical Periodontology16 (2015): S158-S171.
10. Hinode D., et al. "Influence of Smoking on Osseointegrated Implant Failure: A Meta-Analysis”. Clinical Oral Implants Research4 (2006): 473-478.
11. Herrera D., et al. "Prevention and Treatment of Peri-Implant Diseases: The EFP S3 Level Clinical Practice Guideline”. Journal of Clinical Periodontology26 (2023): 4-76.

Citation

Citation: Girish Galagali and Nigama B. “Implant Failure and Prosthodontic Failure in Implant Dentistry: Etiology, Diagnosis, and Clinical Management". Acta Scientific Dental Sciences 10.7 (2026): 34-45.

Copyright

Copyright: © 2026 Girish Galagali and Nigama B. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.