P15 Non‐surgical periodontal therapy reduces VSCs according to disease severity

The objective of this study was to evaluate the effect of non‐surgical periodontal therapy in VSC formation and its relationship with periodontal disease severity. Twenty‐five periodontal patients without treatment and a control group with 10 subjects were selected. The patients were classified according to their periodontal diagnosis based on clinical attachment level (CAL): marginal gingivitis (MG), slight periodontitis‐CAL = 3 mm (P1), moderate periodontitis‐CAL = 5 mm (P2), severe periodontitis‐CAL = 7 mm (P3) and terminal periodontitis‐CAL > 10 mm (P4). At baseline, all patients received oral hygiene instructions and scaling/root planning. The periodontal parameters: plaque index, gingival index, probing depth and clinical attachment level were evaluated in two experimental periods (T1 = Baseline and T2 = 3 months recall). The Halimeter® was used to detect VSC formation in the same periods. The results after three months showed that VSC formation, probing depth and clinical attachment level decreased similarly in groups MG and P1 (P < 0.05). However, P3 and P4 groups showed the highest VSC formation and persistent bleeding in residual periodontal pockets. Within the limits of this study, it could be concluded that non‐surgical periodontal treatment may interfere in VSC formation according to periodontal disease severity. Acknowledgement This work was supported by FAPESP #44052‐01.