When you come to the dentist for a cleaning or dental treatment, you may notice a member of our team holding a little suction device in your mouth. This device is helpful in removing excess saliva. Saliva, also known as spit, is necessary for maintaining your oral health. The main role of saliva is to help remove lingering food and bacteria from your mouth after you eat and drink. Saliva is mainly composed of water, but it does contain high levels of calcium and fluoride to help protect tooth enamel.