How tooth stain happens
Here's some information about how tooth stain happens
Tooth discolouration and staining are primarily due to two sources of stains; Intrinsic and extrinsic. In essence, tooth whitening primarily targets those intrinsic stains in which cannot be removed through mechanics such as debridement (clean) or prophylaxis, in the dental office. Below explains in depth the differences between the two sources of which contribute to such discolouration of the tooth surface.
Extrinsic staining is largely due to environmental factors including smoking, pigments in beverages and foods, antibiotics, and metals such as iron or copper. Coloured compounds from these sources are adsorbed into acquired dental pellicle or directly onto the surface of the tooth causing a stain to appear.
Intrinsic staining primarily occurs during tooth development either before birth or in early childhood. Intrinsic stains are those that cannot be removed through mechanical measures such as debridement or prophylactic stain removal. As the age of the person increases, the teeth can also appear yellower over time.