Exogenous stains refer to:

Exogenous stains are those that originate from external sources and are located outside the tooth structure. They can be caused by various factors, such as dietary choices, tobacco use, and certain types of beverages, such as coffee or tea. These stains are often removable through professional dental cleaning procedures or at-home oral hygiene practices, such as polishing or whitening treatments.

Understanding that exogenous stains are external helps distinguish them from intrinsic stains, which are internal to the tooth due to factors like developmental issues or exposure to certain medications during tooth development. This differentiation is crucial in dental practice, as it guides the appropriate treatment options for managing tooth discoloration. In this context, exogenous stains can often be managed effectively, restoring the tooth’s natural appearance.