What substance is associated with brown stains from chewing betel leaf?

The correct substance associated with brown stains from chewing betel leaf is actually the betel leaf extract itself. When betel leaves are chewed, they often contain ingredients like areca nut and slaked lime, which contribute to the dark brown pigmentation that can stain teeth. This discoloration occurs due to the tannins and other pigments found in the betel leaf and its natural components.

Chlorhexidine is not the cause of the brown stains but is an antiseptic commonly used in dental treatments to reduce plaque and gingivitis. While it can lead to staining as a side effect when used long-term, it is not directly related to the staining caused by betel chewing.

Hydrogen peroxide is often used as a bleaching agent and can help lighten stains rather than cause them. Its primary function is to oxidize stains, making it unlikely to be linked to brown stains from betel leaf.

Fluoride gel is primarily used to strengthen tooth enamel and prevent cavities, and it does not contribute to the staining of teeth. It is more focused on dental health without association to discoloration from betel chewing.

Understanding the specific role of substances is crucial for improving patient education about dietary choices and oral hygiene practices.