Where do orange and red stains typically appear?

Orange and red stains are commonly associated with the accumulation of chromogenic bacteria, dietary choices, or habits related to oral hygiene, particularly in areas that are hard to clean effectively. The cervical third of the teeth is the region closest to the gums, and this area often experiences more plaque retention due to its anatomical shape and position.

Stains in this location are particularly noticeable because they can develop from substances in the diet, such as certain beverages, or due to poor oral hygiene practices. The cervical third tends to be more prone to plaque buildup and stains because it is frequently shielded by gingival tissues that can make thorough cleaning difficult. This location is also where bacteria can thrive, leading to discoloration.

In contrast, the other areas mentioned, like the incisal edge, middle third, or occlusal surface, would show different types of staining or might be less likely to retain orange and red stains due to their exposure to less plaque accumulation and more mechanical cleaning action during chewing and routine oral hygiene practices. Therefore, the cervical third of the teeth is indeed the correct area for these specific types of stains to typically appear.