Dental Admissions Test (DAT) Practice Test

Which of the following is NOT a factor contributing to the development of white spot lesions?

1. Prolonged exposure to acidic foods

2. Good oral hygiene

3. Frequent snacking

4. Poor saliva flow

The correct answer is: Good oral hygiene

Good oral hygiene plays a critical role in preventing dental issues, including white spot lesions, which are an early sign of demineralization often associated with caries. When oral hygiene is maintained at a good level, it helps in the effective removal of plaque and food particles from the tooth surface, thereby reducing the risk of acid-producing bacteria flourishing. In contrast, prolonged exposure to acidic foods, frequent snacking, and poor saliva flow can all contribute to the formation of white spot lesions by creating an environment conducive to demineralization. Acidic foods can erode the enamel directly, while frequent snacking provides a continuous supply of fermentable carbohydrates for bacteria, leading to acid production. Insufficient saliva flow diminishes the natural buffering and remineralizing properties of saliva, further exacerbating the risk of enamel demineralization. Thus, good oral hygiene practices are essential to mitigate these risks and prevent the development of white spot lesions.