- Tetracycline administration during pregnancy can lead to discoloration of teeth as the tooth erupts
in the newborn. Depending on the severity, discoloration can range from yellow -orange in mild
cases and bluish gray in the most severe cases.
- Flurosis is a condition seen in places with increased fluoride content in the drinking water. Beyond a
certain level, fluoride can cause yellow staining of teeth.
- High fever due to childhood infections can lead to areas of poor calcification within the teeth
resulting in the appearance of prominent white spots.
Extrinsic stains can be classified based on color of the stain into:
- Brown stains: It is caused by a thin translucent,
bacteria free layer covering the teeth. It is seen in
individuals who do not brush their teeth adequately, or in those who use toothpaste with
- Tobacco stains: Dark brown or black surface accompanied by brown discoloration of the tooth
substance is seen. These stains results from coal tar combustion present in the tobacco and also
due to the diffusion of tobacco juices into the substance of the teeth.
- Green stains: Green to greenish yellow stains, sometimes of considerable thickness is seen in
children. It is usually seen in upper anterior teeth and has been attributed to florescent bacteria and
- Orange stains : Occurs in front teeth, and is caused by color producing bacteria.