Coronal Polish Certification Practice Test

What is the most common color of extrinsic stain?

1. Blue

2. Red

3. Yellow

4. White

The correct answer is: Yellow

Extrinsic stains are deposits on the external surface of teeth caused by dietary choices, oral hygiene practices, and other environmental factors. Among the various types of extrinsic stains, yellow stains are the most prevalent. This is primarily because yellow stains are often associated with the accumulation of plaque and bacteria, which can build up on teeth due to inadequate oral hygiene. Foods and drinks rich in certain pigments can also contribute to this type of discoloration. In contrast, colors like blue, red, and white do not reflect the common occurrences of extrinsic stains. Blue stains, for instance, are less typical and often associated with specific environmental or chemical factors rather than daily dietary habits. Red stains can be seen with substances such as beetroot or certain medications, but they are not as commonly encountered in everyday life. White stains typically refer to areas of demineralization or other intrinsic conditions rather than extrinsic staining caused by food or beverage consumption. Thus, the answer points to yellow as the most frequently observed color of extrinsic stains, highlighting its connection to common dietary habits and oral hygiene issues.