Dental Admissions Test (DAT) Practice Test

What condition can be confused with white spot lesions due to enamel discoloration?

1. Intrinsic stain

2. Extrinsic stain

3. Dental caries

4. Tooth erosion

The correct answer is: Intrinsic stain

The condition that is often confused with white spot lesions due to enamel discoloration is intrinsic stain. Intrinsic stains originate within the tooth structure itself and can be caused by factors such as genetics, exposure to certain medications (like tetracycline), or developmental issues that affect enamel formation. These stains can present as discoloration across the enamel, sometimes resembling the appearance of white spot lesions, which are often early indicators of dental caries or demineralization. Unlike white spot lesions, which are typically a result of demineralization due to high acidity or plaque accumulation, intrinsic stains are not reversible through professional cleaning or whitening treatments and require different management approaches. The other conditions listed, such as extrinsic stains, dental caries, and tooth erosion, have distinct characteristics that do not closely mimic the appearance of white spot lesions. Extrinsic stains come from external factors like food and drink and are usually superficial, while dental caries presents as more pronounced cavities or areas of decay. Tooth erosion refers to the chemical wear of enamel and typically presents with a different clinical picture. Therefore, intrinsic stains are the most likely to create confusion with white spot lesions due to their similar presentation in terms of enamel discoloration.