Final answer:
The habit that promotes caries formation is snacking between meals, as it leads to the proliferation of plaque-causing bacteria. Preventive habits include flossing, brushing with fluoride toothpaste, using salivary substitutes, and avoiding refined carbohydrates. Conversely, appropriate oral hygiene and fluoride use are key in preventing tooth decay.
Step-by-step explanation:
The habit that may promote caries formation in the list provided is snacking between meals. This is because frequent snacking can lead to a constant presence of food particles in the mouth, which supports the growth of bacteria like Streptococcus mutans. These bacteria are involved in the creation of plaque and can metabolize sugars to produce acid which, in turn, can lead to the demineralization and decay of tooth enamel.
On the other hand, habits such as flossing every day, brushing twice per day, and using a salivary substitute are preventive measures against caries. These habits help to remove food particles and plaque, neutralize the mouth environment to reduce bacteria growth, and, in the case of a salivary substitute, provide necessary moisture to counteract dry mouth conditions which can increase the risk of dental caries. Avoiding refined carbohydrates is another positive habit as it reduces the availability of simple sugars that bacteria use to create harmful acids.
It is important to note that while sugarless candies and products containing fluoride can help protect against caries, moderation is essential. Excessive consumption of sugar alcohols can lead to gastrointestinal distress, and proper fluoride use is necessary for its preventative benefits.