The American Dental Association recommends scheduling an appointment with a dentist every 6 months for a cleaning and checkup. However, patients with dental phobias can struggle with even routine appointments. According to the Journal of Dental Hygiene, 10% to 20% of adults suffer from dental anxiety, but other sources report the prevalence to be much higher. Many factors can contribute to dental anxiety, but your sedation dentist has the solution you need to sit back and relax.