Aim: To evaluate the students\' efficiency of flossing theoretically and mechanically. Materials and methods: Disclosing solution was used to detect the plaque clinically following the plaque index by Silness and Loe. The clinical examination was done three times, once before any oral hygiene measure, then after brushing with a toothbrush only and finally after flossing. Each participant filled a questionnaire on their oral hygiene habits, knowledge of flossing importance and their protocol for dealing with their patients\' oral hygiene. Results: A group of 84% of the students use the dental, 52% had the dental floss recommended to them by a dentist, 77% believe that the dental floss does not harm the teeth and gingiva, and 79% believe that neglecting to floss can lead to the development of both dental caries and periodontal diseases. Only 50% of the students educate all their patients on flossing, and the majority do it by a demonstration on a plastic jaw or verbally only. The examinations revealed that a mean of 68% plaque was found on the teeth before any oral hygiene measure with the majority being grade II, a mean of 33.53% was found after brushing only with the majority being grade I and a mean of 10.82% was found after flossing with the majority being grade I as well. Only 39% of the students were able to achieve complete plaque removal, and the posterior areas had the highest percentages of persisted plaque after flossing. Conclusion: The students\' flossing technique needs to be emphasized during their education, alongside the importance of educating all the patients on flossing and monitoring their efficiency throughout the treatment and maintenance visits. Clinical significance: Students need to be able to floss their teeth efficiently to transport that knowledge to their patients and follow-up its application throughout the visits.