In epidemiology, incidence refers to the number of new cases of a disease or condition that occur within a specific time frame in a defined population. Dental caries, also known as tooth decay, is a common chronic condition where bacteria in the mouth produce acids that destroy the tooth enamel and underlying dentin, leading to cavities. The incidence of dental caries would be the number of new cases of tooth decay diagnosed within a given period, say a year or another time interval.

Point prevalence, on the other hand, is the proportion of a population that has a specific condition at a particular point in time. It is a measure of the prevalence of dental caries at a single moment, which does not account for new cases or recoveries.

Period prevalence is the proportion of the population that has had a particular condition during a specific period of time, such as a year or a month. This measure includes both new cases and cases that have persisted from before the start of the period in question.

Stannous fluoride is often favored for adults due to its ability to provide antimicrobial benefits along with its fluoride release, which can help in controlling dental caries and reducing sensitivity. It is commonly found in toothpaste and mouth rinses and is known for its effectiveness in preventing cavities and plaque formation.

Group discussion because participants get chances to express thier views Idea panel discussion : 4-8 people talk abt a topic in front of large group. symposium:series of speeches on a selected subject, no discussion. group discussion :considered a very effective method of health edu if the group consists of not less than 6 and not more than 20 persons. workshop:usually lasts for few days wher people get together and work in different groups and discuss problem of concern it can be called a problem solving method.

Dental plaque is a bacterial biofilm that forms on the teeth and is a common factor in the development of both dental caries and periodontal disease. While fluoride in drinking water can help prevent dental caries, it is not directly related to periodontal disease. Nutritional disturbances can affect the overall health of the individual but are not the sole cause of either condition. Disturbed occlusion may be a risk factor for certain dental issues but is not universally common to both diseases.

 Randomization is a key component in experimental design that helps to minimize bias by distributing potential confounding variables evenly among the treatment and control groups. This process increases the likelihood that any observed differences between the groups are due to the treatment itself rather than pre-existing characteristics of the participants.