Dental Admissions Test (DAT) Practice Test

What type of stain occurs on enamel that appears as a white discoloration?

1. Brown spot lesions

2. White spot lesions

3. Yellow spot lesions

4. Black spot lesions

The correct answer is: White spot lesions

The type of stain on enamel that appears as a white discoloration is known as white spot lesions. These lesions are typically indicative of early demineralization of the enamel, often due to various factors such as plaque accumulation, poor oral hygiene, or dietary influences. The appearance of these lesions can be attributed to changes in the mineral content of the enamel, which results in a loss of brightness and a whitish hue. White spot lesions are crucial to recognize in dental practice because they represent an early sign of caries development. If addressed in the initial stages, there is potential for remineralization and reversal of the process, often through improved hygiene practices, fluoride treatment, or dietary changes. In contrast, other types of lesions mentioned, such as brown, yellow, or black spot lesions, do not describe the same early demineralization phenomenon and typically indicate more advanced decay or staining processes. Brown spot lesions usually reflect a more significant level of demineralization with additional pigmentation, while yellow and black spot lesions describe discoloration occurring from various sources or conditions that have advanced beyond initial white spots. Thus, identifying white spot lesions allows practitioners to take preventive measures promptly.