The teething period of milk teeth usually occurs at 4 to 10 months after birth and lasts until the age of 3. The teething period of permanent teeth begins at the age of 6 and lasts until about 12 years old.
1. At birth, milk teeth are already ossified and hidden in the upper and lower jaws. They gradually begin to erupt at around 4 to 10 months of age, generally the lower jaw erupts before the upper jaw, from front to back, and the majority of young children have all of their milk teeth before the age of 3 years. The time and order of eruption varies greatly among individuals and is related to genetic, food and endocrine factors.
2. The first permanent tooth erupts at the age of 6 years, which is the first permanent molar, also known as the six-age tooth. 6~12 years old, the milk teeth are gradually replaced by the permanent teeth in the same position, which is also known as the mixed dentition period. The first permanent molar erupts early and is often overlooked by parents, who should pay more attention to its protection.
Children with delayed eruption of milk teeth should go to the hospital in time to avoid abnormalities in teething.