Efficacy of an unwaxed dental floss impregnated with 2% chlorhexidine on control of supragingival biofilm: A randomized, clinical trial

Aim In the present study, we evaluated the antiplaque and antigingivitis efficacy of a dental floss impregnated with 2% chlorhexidine digluconate. Methods Thirty dental students were randomly divided into three groups (n=10): (a) negative control (NC) group, in which no interproximal cleaning was performed; (b) the positive control (PC) group, which used a standard unwaxed dental floss twice daily; and (c) and the test group, which used a unwaxed dental floss impregnated with 2% chlorhexidine twice daily. Six surfaces per tooth were evaluated by the Quigley‐Hein plaque index (Turesky modification) at the last appointment (day 15), and testing for the presence of marginal bleeding was performed using the marginal bleeding index (MBI) at both the baseline and last appointments. Results At day 15, the test group had the lowest mean plaque index (1.04±0.67), showing a statistically‐significant difference compared to the NC group (1.40±0.65, P