A stain that cannot be removed from the surfaces of the teeth is caused by:

Question

Quizplus · Accepted Answer

Tetracycline antibiotics can cause intrinsic staining of the teeth, meaning the stain occurs within the tooth structure and cannot be removed with regular cleaning methods. Other options listed (tea, coffee, colas, tobacco, and chlorhexidine mouth rinse) can cause extrinsic staining, which occurs on the outer surface of the teeth and can be partially or completely removed with professional cleaning or at-home whitening methods.

A Stain That Cannot Be Removed from the Surfaces of the Teeth