Tooth loss after active periodontal therapy. 2: tooth-related factors
: Bernadette Pretzl
: Blackwell Synergy
Objective: To assess tooth-related factors contributing to tooth loss over a period of
10 years after completion of active periodontal therapy (APT).
Material and Methods: All patients who had received APT by the same experienced
periodontist, 10 years before beginning the research, were recruited until 100 patients
were re-examined. Examinations included, at the patient level: test for interleukin-1
polymorphism, compliance to supportive periodontal therapy (SPT), mean plaque
scores during SPT; at the tooth level: assessment of baseline bone loss (type, amount),
tooth type, furcation status and abutment status. Logistic multilevel regression was
performed for statistical analysis.
Results: Hundred patients with 2301 teeth at the baseline (completion of APT)
were retrospectively examined. One hundred fifty-five teeth were lost over 10 years
after APT. Logistic multilevel regression identified high plaque scores, irregular
attendance of SPT and age as patient-related factors significantly accounting for
tooth loss. Tooth-related factors significantly contributing to tooth loss were
baseline bone loss, furcation involvement and use as an abutment tooth. However,
in patients with regular SPT, 93% of teeth with 60Ã¢â‚¬â€œ80% bone loss at the baseline,
survived 10 years.
Conclusion: The following tooth-related risk factors for tooth loss were identified:
baseline bone loss, furcation involvement, and use as an abutment tooth.
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