Methods: 84 patients with 2154 teeth were re-examined on average 10.5 years after APT. Examinations included the patient level: test for interleukin-1 polymorphism, mean plaque (PCR) and bleeding scores (GBI) during supportive periodontal therapy (SPT), socioeconomic status, and smoking status; at tooth level baseline bone loss, tooth location (maxilla/ mandibula), tooth type (front teeth, premolar, molar), furcation involvement (FI), and abutment status were assessed. Multilevel regression analysis was performed for statistical analysis using SAS®.
Results: During SPT 113 teeth (1.34 teeth per patient) were lost. Regression analysis identified socioeconomic status (p=0.02) as patient-related factor significantly accounting for tooth loss. Tooth-related parameters significantly contributing to tooth loss during SPT were baseline bone loss (p=<0.0001), use as abutment tooth (p=0.039), and maxillary location (p=0.001). Molars showed the highest risk for tooth loss after APT (OR=5.7, p=0.0008).
Conclusion: Baseline bone loss, abutment status, tooth location and tooth type were detected as tooth-related risk factors for tooth loss during PM in patients with AgP.
The study was supported by Tobias Hain (Hain Life Science GmbH, Nehren, Germany).