Before each visit to the dentist, you should brush your teeth as thoroughly as possible, clean the interdental spaces and rinse your mouth with a daily disinfection liquid. If it is the first visit after a longer period of time, it is also worth cleaning the teeth from all bacterial deposits and sediments which have formed on our teeth during their use. All dark coffee, tea and cigarette deposits as well as bacterial plaque and tartar should be removed before visiting a dentist. This allows the doctor to see clearly if there are cavities in the mouth. A dental hygienist is responsible for professional cleaning of the teeth of all deposits.
Details of the first visit and specimens of documents can be found here: first visit.