to determine the effect on periodontal health of a daily self-administered irrigation with 0.02 % stannous fluoride ( snf2 ) solution , 28 subjects who had moderate to advanced periodontitis were randomly divided into 3 groups : a control group ( n = 9 ) which used no irrigation , a group ( n = 8 ) which used a self-administered water irrigation device ( water pik ) daily with water ( h2o group ) and a group ( n = 11 ) which used the water pik in a similar manner but with snf2 solution ( snf2 group ) .
C0590256
water irrigation
C0043047
water