Coronal Polish Certification Practice Test

What kind of stains can develop from drug usage and metals?

1. Extrinsic stains

2. Intrinsic stains

3. Endogenous stains

4. Exogenous stains

The correct answer is: Intrinsic stains

The correct answer is intrinsic stains, which are stains that originate from within the tooth structure. They can be caused by factors such as drug usage—particularly with certain medications that can affect tooth color, like tetracycline—as well as the accumulation of metals in the body, such as iron or lead. These substances can lead to a change in the internal coloration of the teeth, resulting in a stain that cannot be removed by surface cleaning. Intrinsic stains are different from extrinsic stains, which are primarily located on the surface of the teeth and can be typically removed through professional cleaning or dental hygiene measures. Endogenous stains are another category, but they specifically refer to stains that arise from within the body and are often associated with systemic issues or developmental disturbances, rather than direct exposure to drugs or metals. Lastly, exogenous stains come from external sources, such as food, drinks, or smoking, and are not related to drug usage or metal accumulation in the way that intrinsic stains are. Understanding the distinction between these types of stains is essential for dental professionals, as it informs the appropriate treatment and management options for patients dealing with discoloration of their teeth.