When we say teeth cleaning, we’re talking about a professional dental cleaning, not just brushing your teeth at home. Without a professional cleaning, tartar and plaque could build up, discolor your teeth , affect your gums and bone, and lead to decay or tooth loss. And when you think about the consequences of not taking care of your teeth, visiting the dentist twice a year (recommended) doesn’t sound so bad after all. Depending on the condition of your teeth, the time a cleaning takes can vary. But usually, the whole appointment can last between 30 minutes and an hour.