Résumé
The aims of this study is to: 1: evaluate clinically the effect of the newly mouth wash extracted from Qureucus infectoria on dental plaque formation. 2: estimate the toxic effect of the extract. 3: assess the antibacterial activity of the extract. The 12 dental students volunteers participating in this trial. The participants were exposed to repeated professional plaque control to eliminate signs of gingivitis and was subsequently told to abstain from mechanical plaque control efforts for the next 5 days they were asked to rinse twice daily for one minute each time with 10 ml of placebo mouth rinse and 0.2% chlorohexidine and three times daily for one minute each time with 10 ml of 1% alcoholic extraction of Qureucus infectoria mouth rinse result demonstrate that plant extract reduced plaque accumulation better than of chlorohexidine mouth rinse