What can lead to the discoloration of teeth?

Discoloration of teeth is often caused by the consumption of certain foods and drinks that can stain or impact the enamel. Items such as coffee, tea, red wine, and certain berries contain tannins and pigments that can adhere to the tooth surface, leading to staining over time. Additionally, acidic foods and beverages can wear down enamel, making teeth more susceptible to discoloration from other sources.

Other factors, like grinding teeth, excessive brushing, and not using dental floss, may contribute to issues related to dental health or wear but are not direct causes of tooth discoloration in the same way that dietary choices are. Grinding teeth can lead to wear or sensitivity but does not inherently change the color of tooth enamel. Excessive brushing can damage gums and enamel, possibly leading to sensitivity or exposed dentin, but it generally does not cause staining. Similarly, using dental floss is crucial for oral hygiene but does not affect tooth color directly. Therefore, the primary source of tooth discoloration among the options presented is indeed the consumption of certain foods and drinks.