Association Between the Type of Dental Care Setting and the Risk of Dental Implant Failure in Korea: A Retrospective Nationwide Population-Based Cohort Study

Document Type : Original Article

Authors

1 Department of Dental Hygiene, Silla University, Busan, Republic of Korea

2 Institute of Health Medical Education Convergence Research, Kangwon National University, Gangwon-do, Republic of Korea

3 Department of Physiology, Dong-A University College of Medicine, Busan, Republic of Korea

4 Department of Data Sciences Convergence, Dong-A University Interdisciplinary Program, Busan, Republic of Korea

Abstract

Background 
In Korea, the introduction of reimbursable dental implant procedures has intensified competition among dental practices, albeit with an increase in consumer complaints related to implant failures. Our study aimed to evaluate the association between the dental implant failure risk and the dental care setting.
 
Methods 
This retrospective cohort study used data from the Health Screening Cohort (HEALS) of the Korean National Health Insurance Service (NHIS) to analyze the risk of dental implant failure from January 1, 2016, to December 31, 2019. The risk of dental implant failure according to the dental care setting was assessed using inverse probability of treatment weighting (IPTW) adjusted Cox regression analysis. The covariates included demographic, socioeconomic, and clinical factors. The hazard ratios (HRs) with 95% confidence intervals (CIs) were estimated. Among 44 220 cases, additional analyses were performed by stratifying implant procedures in private dental practice (n = 40 502) into quartiles to assess the risk of failure according to procedural volume.
 
Results 
Hospital-based dental clinics exhibited a lower implant failure risk compared with private dental practices (HR: 0.35, 95% CIs: 0.30–0.41) and group dental practices (HR: 0.34, 95% CIs: 0.20–0.58). Private dental practices with the top 10% and 5% procedural volume showed a higher failure risk (HR: 1.23, 95% CIs: 1.09–1.38; HR: 1.38, 95% CIs: 1.23–1.54, respectively) relative to practices handling the remaining 90% and 95%.
 
Conclusion 
The risk of dental implant failure was lower in hospital-based dental clinics compared with private and group dental practices, indicating the need for more systematic and thorough postoperative care to improve implant safety in settings associated with higher failure risk.

Keywords

References

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History

  • Received Date: 26 May 2025
  • Revised Date: 08 September 2025
  • Accepted Date: 18 December 2025
  • First Published Date: 18 December 2025
  • Published Date: 01 December 2025

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