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Tooth Loss During Supportive Periodontal Care (SPC): A Three Decades Retrospective Study in a University Setting
1Clinic of Conservative Dentistry and Periodontology, University Hospital Schleswig-Holstein, Kiel, Germany.
Journal of Clinical Periodontology
|July 19, 2026
Summary
Tooth loss was low over 30 years of supportive periodontal care (SPC), even with advanced disease. Residual disease severity influenced tooth loss risk, but predictive accuracy was modest for individual prognoses.
Area of Science:
- Periodontology
- Dental Public Health
Background:
- Supportive periodontal care (SPC) is crucial for long-term periodontal health.
- Understanding tooth loss predictors in exceptionally long-term SPC is vital for patient outcomes.
Purpose of the Study:
- To evaluate tooth loss and its predictors during over 30 years of SPC.
- To focus on the impact of residual disease severity at SPC initiation on tooth loss.
Main Methods:
- Retrospective cohort study of 70 patients with >30 years of SPC.
- Analysis using negative binomial regression and Cox proportional hazards models.
- Assessment of tooth loss predictors including probing depth and periodontal inflammation.
Main Results:
- Low tooth loss observed (0.13 teeth/patient-year) despite advanced baseline disease (97% stage III/IV).
- Probing depth ≥6mm and furcation involvement (FI) II-III were significant predictors of tooth loss.
- Predictive accuracy of these markers was modest, suggesting population-level risk rather than individual prognosis.
Conclusions:
- Tooth loss remained low over 30+ years of SPC, even with advanced initial disease.
- Residual disease severity significantly modulated tooth loss risk.
- Generalizability is limited due to survivorship bias and focus on specialist care.
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