The mouth fulfills vital functions in humans. It is the first contact with the outside world, all the nutrients pass through it.

The expressions of joy and sadness, and speech sounds are produced with the activity of the tongue, lips, cheeks and successively with the changes wrought by the eruption of teeth.

Oral hygiene is the most effective preventive measure during early childhood. At age 6 the first permanent molar erupts behind the baby molars, without replacing any of the 20 teeth in the mouth. Often, if there is no discomfort, neither parents nor the child perceive their eruption.

The lower front teeth (central incisors) will refill in the same period and the fall of the first baby tooth attracts the attention of the child and family group who shares his way to the permanent dentition. Since its correct location in the dental arch is organized the rest of the permanent dentition.