Science has shown that heat will cause molecules and atoms to vibrate faster, increase space between atoms and cause expansion. Tooth enamel is one such substance that will expand under heat and during that stage, the tannins in coffee and tea can lodge into the void and as the teeth cool down again, tooth staining can be the result.

Proper oral hygiene can help teeth stay clean and lower the level of dental plaque, and brushing with a whitening toothpaste may help alleviate some of the discoloration. Patients may also choose to get professional teeth whitening from a dentist specializing in cosmetic dentistry.