There is no exact time of growth. How close is the permanent dentition to the deciduous dentition?

It is most common in the premaxillary area, that is, the extra teeth between the upper and lower left and right transverse central incisors.

The morphology varies greatly, most of them are conical, followed by nodular type

Children with cleft lip and palate and those with incomplete clavicle development are often accompanied by extra teeth, which can occur singly or in several groups, symmetrically or asymmetrically.

Abnormal tooth size

Abnormal morphology

macroglossia

Microglossia

Normal eruption sequence of permanent teeth

Ectopic eruption of upper 6 is more common

Breastfeeding or artificial feeding. Due to improper positioning of the bottle, inappropriate nipple size, and improper feeding posture, the front part of the mandible is insufficient or excessive, resulting in mandibular retrusion or mandibular protrusion.

Babies often have water habits when they are 3 to 4 months old. Generally, they can be regarded as normal physiological activities before the age of two or three. They disappear on their own between the ages of 4 and 6 years old. However, thumb sucking habits should be corrected in time when they occur.

Important signs to determine whether there is a thumb-sucking habit: calluses on the fingers, bending of the fingers

Lower lip biting habit

The habit of biting your upper lip

Covering lower lip habit

Long-term lateral chewing can cause facial and jaw structure asymmetry

Usually the habit disappears on its own

Retention of habits leads to local opening and closing