RESULTS	The preintervention and postintervention comparison within each group revealed a substantial reduction in mean oral hygiene index-simplified ( OHI-S ) , plaque index ( PI ) , and gingival index ( GI ) at postintervention compared to baseline in group 4 ( 1.26 , 0.87 , and 0.74 , respectively ) followed by group 3 ( 0.14 , 0.37 , and 0.12 , respectively ) .\