Effectiveness of Theobromine Toothpaste

Participants will be examined to ensure that they have met the smple entrey criteria,then the participants will be randomly assigned to four groups each one according to a group: 1. A group of children using low-fluoridated toothpaste (500ppm) 2. A group of children using fluoridated toothpaste (1450ppm) 3. A group of children using theobromine toothpaste (2%) 4. A group of children using low-fluoridated toothpaste (4%) The researcher will teach the participants how to brush using (tell-show-do)technique. * The brushing method that will be used is the fones technique. * Brushing duration must be 2minutes. * Frequency of brushing must be twice a day * The amount of toothpaste used is pea size. Mechanism of examination and follow up: A thorough scaling and plaque removal was conducted and the children were advised to brush their teeth using their regular toothpaste for a week before starting the research. Gingival will be evaluated with gingival index (loe and silness)