Where is black line stain more commonly found?

Black line stain is more commonly found on the anterior teeth. This characteristic stain typically forms in a continuous or interrupted line along the gingival margin, particularly affecting the facial surfaces of the maxillary and mandibular anterior teeth. The stain often appears as a narrow band, which is more visible on these front teeth due to their position and orientation in the mouth.

Research indicates that individuals who develop black line stains often have excellent oral hygiene. The minerals that contribute to this type of stain come from the saliva, leading to deposition along the gum line. Although black line stains can appear elsewhere in the mouth, their prevalence on the anterior teeth is notably higher due to both anatomical positioning and patterns of salivary flow.

The other choices represent tooth locations where black line stains can occur, but they do not have the same frequency as found on the anterior teeth. Understanding the common locations for black line stains assists dental hygienists in identifying and addressing oral health issues effectively.