What kind of stains occur on the outer layer of the tooth from environmental agents?

Extrinsic stains refer to discoloration that happens on the outer layer of the tooth, primarily due to external factors or environmental agents. These stains are often the result of the consumption of certain foods, beverages, tobacco use, or poor oral hygiene, which can lead to the accumulation of pigment from these substances on the enamel surface. Unlike intrinsic stains that originate from within the tooth and cannot be removed through regular cleaning, extrinsic stains can typically be effectively managed with professional dental cleanings, whitening procedures, or improved oral hygiene practices. This distinction emphasizes how external factors can influence the appearance and health of teeth, making it vital to understand and differentiate the types of dental stains.