Why is it important to visit the dentist regularly?

Because if you don't, your teeth will be come bad and hard to deal with afterwards.

It's important to brush because stuff will start collecting on your teeth and weaken them, and it's hard to fix them later. It's important to floss because stuff collects in between your teeth, and can create large spaces in between your teeth which also are hard to fix.

Because if you don't then your breath will stink and you will later lose all your teeth and you'll have to use dentures.