When babies are born, they have no teeth in their mouths; these will gradually erupt during their growth process. Generally speaking, infants may start to grow their primary teeth as early as four months, but most children will not show this change until after six months. Teeth grow in pairs, beginning with the lower incisors, followed by the upper incisors, then the lateral incisors, premolars, canines, and finally the molars. By around three years old, all twenty primary teeth will typically be fully developed. The timing of the first appearance of teeth varies, and generally falls within the normal range of 4 to 12 months. If a child is one year old and has not yet shown any teeth, but other developmental indicators are normal, there is no need for excessive worry. In rare cases, delayed tooth growth may be related to metabolic issues, but this is usually accompanied by other health problems.
The sequence of tooth development is influenced by genetic factors, calcium levels within the body, and the condition of the primary teeth themselves. If a baby exhibits symptoms such as nighttime crying, excessive sweating, sparse hair at the back of the head, or delayed growth and development, it is recommended to conduct a blood calcium test to rule out potential issues.
Overall, it is normal for infants to develop teeth before they turn one year old. If a baby shows signs of impending teething, such as chewing on objects, moderate hardness biscuits, breadsticks, or toasted steamed bread can be given to help alleviate gum discomfort and promote tooth eruption.
Although there is individual variation in the timing of tooth eruption for infants, it still follows a certain规律 and symmetry. Primary teeth typically begin to appear between 6 to 7 months, with situations of starting as early as 4 months or as late as 10 to 12 months being quite common. The entire process of eruption of all primary teeth generally completes by 2 to 2.5 years, totaling ten teeth in both the upper and lower jaws, for a total of twenty teeth.
Therefore, if a baby has not developed teeth by ten months, parents need not worry excessively, as different babies’ physical constitutions lead to variations in teething times; as long as teeth begin to emerge before one year, it is regarded as a normal occurrence.
