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Objectives: evaluate the gingival status in the first-year students in Hanoi Medical University and the effectiveness of treating gingivitis by scaling. Materials and Methods: This research was designed as two cross-sectional surveys before and after a clinical intervention. Subjects included 71 first-year students at Hanoi Medical University who were chosen randomly. After the first examination, there were only 46 cases of moderate gingivitis prescribed to take tartar and continuously checked again after three months. Results and Conclusions: The rate of gingivitis in the group of students was high at 80%; however, the results in three months later saw 72% of cases having no anymore gingivitis among 46 intervened students. The improved status of gum occurred in both genders on the post-intervention as Gingival Indexes at good level rocketed from 0% to 60% of cases, mainly in incisors on both jaws. The rate of Oral Hygiene Index-Simplified in moderate and poor declined simultaneously by a half in both genders showed in the very low level of debris in both jaws and in the high level of the Calculus Index in good accounting for over 98% on the whole teeth regions.

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