Normal 0 false false false EN-US X-NONE AR-SA In this study, 30 boy students of 16-17 years were randomly selected and were allocated into three groups: The control group, Bass group in which the members were instructed to brush their teeth with Bass method and Rolling method group in which they were asked to brush  with Rolling Method. Two latter groups brushed their teeth two times a day (morning/night) .for all the participants, ultrasonic scaling was done 4 weeks prior to the study. After 4 weeks, PLI and GI were measured and recorded by Sillness and Loe method. All the participants used a soft multitufted tooth brush. All 3 groups showed lower indices in comparison to basle line measurements but Two latter groups showed  higher difference in comparison to the control group.The difference between Second and third groups was not found statistically significant. Gingival index during 4 weeks of study has not changed siginificantly.The obtained results confirmed the importance of duration and quality of every brushing technique.