What happens if you don't brush your teeth?

A few thoughts.. Bacteria that stick to your teeth produce acid. The damage caused by this acid includes cavities and periodontal disease (bone loss). Bad breath would probably turn off most everyone you approach. All said and done, ignore your teeth and they'll go away.

Related Questions

What happens if you don't brush your teeth for a long time?

Breakdown:teeth/gums. You can have breakdown of the teeth (decay), gums (gingivitis) and bone (periodontitis). You may have discoloration of the teeth, very bad breath, and pain. The gums will bleed. The infection from this can spread to other parts of your body such as your heart. Statistics show that you will not live as long as if you had excellent oral hygiene. Read more...
Common sense. Cleaning your teeth and mouth is just common sense. If you don't, what happens depends on your resistance to dental breakdown, which varies from one person to the next. Long-term dental neglect can cause severe problems in susceptible individuals. I strongly suggest seeking dental care for an evaluation and a good cleaning to help you catch up and follow through with good oral hygiene. Read more...
Plaque. That classic experiment has been done several times with dental students. Lack of brushing and flossing leads to plaque accumulating on your teeth. This leads to gingivitis, periodontitis if you are susceptible , and maybe cavities. Meanwhile you can have bad breath and bad tastes. Read more...

I'm interested to know what happens if you don't brush your teeth when you have braces?

Disaster. Infected teeth with permanent unsightly scars, cavities, abscesses (pain/swelling/bleeding). Infected gums with swelling (slows tooth movement--longer time in braces) or gum ; bone recession (sensitivity, loose teeth) with pain/bleeding/swelling. Poor oral hygiene = bad breath, driving your friends and family away. Read more...