What treatment is associated with extrinsic staining known to affect teeth?

Chlorhexidine is a treatment that is known to be associated with extrinsic staining of teeth. It is an antimicrobial mouthwash commonly used in dental care for its effectiveness in reducing plaque and controlling gingivitis. However, one of the side effects of chlorhexidine use is that it can lead to the development of brownish or yellowish stains on the teeth as well as on the tongue. This staining occurs due to the chlorhexidine’s ability to bind to dental plaque and surface enamel, which can result in discoloration over time.

In contrast, fluoride treatments primarily provide preventive benefits by strengthening enamel and protecting against caries, without causing staining. Sealants are used to prevent decay in pits and fissures of teeth and do not contribute to external staining. Varnish application, typically used for fluoride delivery and to protect sensitive areas, also does not lead to extrinsic staining.

Understanding these differences is key to recognizing how certain dental treatments can affect the aesthetic appearance of teeth.