Effect of Chlorhexidine Gel on Bacterial Count During Fixed Orthodontic Treatment

Inclusion Criteria: * Patients' age range from 18-30 years. * Fixed orthodontic treatment. * All the patients are at the end of leveling and alignment stage. * Initial bacterial count indicates high caries risk. * All patients will be given good oral hygiene instruction at the first visit. * The subjects had not taken antibiotics for at least 6 weeks before saliva sampling or during the experimental period. * All subjects used a fluoride dentifrice twice a day. Exclusion Criteria: * Patients' age more or less then the age range specified. * Removable orthodontic treatment. * Patients at early stages of leveling and alignment. * Initial bacterial count indicates low caries risk. * Subjects that have taken antibiotics for at least 6 weeks before saliva sampling.