PCT application
The interventions were carried out by a single operator throughout the study period, in order to eliminate inter-operator variability. However, the operator could not be blinded, as this study had a split-mouth design, with all subjects receiving all four interventions.A little less than 1ml of 1% gel formulation (Nano ZnO/ placebo) was applied to the periodontal pocket with a blunt cannula, filling it from its base to its coronal end (
