What type of stain,found on some children's teeth,can be caused by poor hygiene and the fungi that are retained in bacterial plaque?

Question

Quizplus · Accepted Answer

The green stain found on some children's teeth may be from poor hygiene and the fungi that are retained in bacterial plaque.
Chromogenic bacteria is responsible for black line stain.
Yellow or orange/brown stain is a result of poor oral hygiene,lack of an abrasive dentifrice or age.
Drinking red wine can cause red staining of the teeth.

What Type of Stain,found on Some Children's Teeth,can Be Caused