... factors relating to the decay teeth, Gingivitis, dental plaque and KAP about ODC for the 12 year -old pupils - Identified the reality of the decay teeth, gingivitis, dental plaque for the pupils - ... about the oral and dental care for the 12 years -old pupils at some secondary schools in Gia Lam, Quoc Oai District, Hanoi City in 2009 Assess the efficiency of dental plaque control in the decay teeth, ... activities in Hanoi in 2009-2010 of National Institute of Othodonto – Stomatology”, we researched the theme: Assess the efficiency of dental plaque control in decay teeth, gingivitis prevention for the...