system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why dental tartar is so hard and bounds to teeth like glue? It's like a secondary tooth made of bacterias.
gpt
Plaque, the softer stuff that makes your teeth feel "fuzzy", can turn INTO tartar if it's not removed by brushing/flossing. The minerals in your saliva interact with the plaque to form crystals that harden into tartar.