Dental Admissions Test (DAT) Practice Test

What generally causes the formation of white spot lesions on teeth?

1. Dietary habits

2. Poor oral hygiene

3. Fluoride overexposure

4. Genetic factors

The correct answer is: Poor oral hygiene

The formation of white spot lesions on teeth is most commonly associated with poor oral hygiene. These lesions are indicative of subsurface demineralization of enamel, which can occur when plaque accumulates on teeth due to inadequate brushing and flossing. When plaque is not effectively removed, bacteria can produce acids that demineralize the tooth surface, leading to the characteristic white spots often seen in early stages of dental caries. While dietary habits can contribute to the overall risk of tooth decay, it is the insufficient removal of plaque through poor oral hygiene practices that directly leads to the development of white spot lesions. This is why maintaining a consistent and effective oral hygiene routine is crucial for preventing these issues. Fluoride overexposure and genetic factors may play roles in overall dental health, but they are less directly linked to the formation of these lesions compared to the impact of oral hygiene. For instance, while excessive fluoride can lead to dental fluorosis, resulting in white spots or streaks, this is different from the type of demineralization commonly seen as a result of poor oral hygiene. Similarly, genetic predisposition can influence enamel quality or susceptibility to decay but does not singularly account for the development of these lesions in the absence of proper hygiene.