Coronal Polish Certification Practice Test

What type of stain is most commonly observed on teeth?

1. Brown (Extrinsic)

2. Yellow (Extrinsic)

3. Black (Intrinsic)

4. Green (Extrinsic)

The correct answer is: Yellow (Extrinsic)

The yellow stain is the most commonly observed type of stain on teeth, primarily due to its association with dietary factors, oral hygiene, and the accumulation of plaque. This stain forms on the outer surface of the teeth (extrinsic) and can often be removed with routine dental hygiene practices like brushing and professional cleanings. Yellow stains often result from food and drink consumption, such as coffee, tea, and certain fruits, which contribute to the discoloration of the enamel. Understanding this type of stain is important because it emphasizes the need for consistent oral hygiene, as well as the occasional reinforcement of proper dental care habits to minimize their occurrence. Unlike intrinsic stains, which are more difficult to treat and are often due to factors that affect the tooth structure itself, extrinsic stains like yellow stains can usually be prevented and managed effectively with the right precautions.