Antibacterial Effect and Clinical Performance of Chitosan Modified Glass Ionomer

Inclusion Criteria: The teeth will be primary molars selected from patients presented to the outpatient clinic that are * Healthy patients. * Age: 4-8 years. * Children having at least one primary molar with only occlusal caries having dentine lesions wide enough for the smallest excavator to enter (Ø=0.9 mm). Exclusion Criteria: * Teeth with pulp involvement, those suffering from pain, irreversible pulpits or pulp necrosis. * Children with systemic diseases. * Patients with history of active para-functional oral habits, xerostomia. * Patients who will have difficulties in cooperating.