The initial part of the digestive and partially respiratory system is the oral cavity. The oral cavity together with the associated organs participates in the first steps of digestion of food. Oral health is an important part of general health, and includes the health of the entire oral cavity, respectively the health of teeth, periodontal tissue, mucous membranes and salivary glands. Proper oral hygiene, the regular use of mechanical and chemical instrumentalities prevents the collection of plaque and its mineralization. In children up to 3 years of age, the biggest culprit for caries, with insufficient and improper maintenance of oral hygiene, is the bottle. Proper and balanced diet can affect the quality of teeth. Proper hygiene and regular check-ups help maintain dental health. Instrumentalities play the most important role in maintaining oral hygiene. Oral hygiene should also be started before the teeth erupt, which is done with sterile gauze or a disposable finger cover. The main and indispensable instrumentality of oral hygiene is a toothbrush, which is used to clean teeth, gums and tongue. While toothpaste in combination with a toothbrush play the biggest role in maintaining oral hygiene. Initially, oral hygiene should be carried out by parents. Parents are those who support the child with their example and encouragement.