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Which Tooth Comes First in Babies?

Infant Dental Development: Order of Eruption, Types of Teeth, Total Count, and Timing of Tooth Loss

Infant dental development is a significant process that begins shortly after birth and plays a crucial role in a child's nutrition, speech, and jaw development. In this article, we will delve into the specifics and stages of dental development in infants.

1. Order of Eruption:

The first tooth to emerge in infants is typically one of the lower central incisors, the front teeth located on the bottom jaw. This usually starts to occur around 6 months of age. The eruption of the first teeth can cause discomfort and restlessness in infants. Apart from the lower central incisors, the upper central incisors usually start to emerge around the same time. However, it's essential to note that every child is unique, and dental development can vary among individuals.

2. Subsequent Teeth Eruption:

Following the eruption of the first teeth, various types of teeth emerge in a sequential manner. The order of tooth eruption is as follows:

Lateral Incisors: These are the teeth adjacent to the central incisors, and they typically start to emerge between 9 to 13 months of age in both the upper and lower jaws.

Canines (Cuspids): The canines are the pointed teeth situated on each side of the lateral incisors. They usually begin to emerge between 16 to 23 months of age.

First Molars: The first molars are the wider back teeth, and they usually start to emerge between 13 to 19 months of age in both the upper and lower jaws.

Second Molars: These are the last primary molars to emerge, and they typically appear between 23 to 33 months of age.

3. Total Number of Teeth:

By the time infants' dental development is complete, they will have a total of 20 primary teeth, also known as baby teeth. Each jaw (upper and lower) will contain 10 teeth, consisting of the following types: 4 central incisors, 4 molars (2 first molars and 2 second molars), 2 lateral incisors, and 4 canines.

The first tooth in infants
The first tooth


4. Timing of Tooth Loss:

After the primary teeth have erupted, they eventually start to shed as the child grows, making way for the permanent teeth. Tooth loss usually begins around the age of 6 or 7 when the lower central incisors are typically the first to be lost. The permanent teeth then erupt in their place. Following that, around the ages of 7 to 8, the upper central incisors are usually lost, giving way to their permanent successors.

Subsequently, as children continue to grow, they will experience the gradual loss of their primary teeth, with the process generally lasting until the adolescent years. As the permanent teeth emerge, the baby teeth make room for them, resulting in a total of 32 permanent teeth.

In conclusion, infant dental development is a crucial process that commences shortly after birth and has a profound impact on a child's nutrition and jaw development. The first teeth to emerge are usually the lower central incisors, and by the time their dental development is complete, infants will have a total of 20 primary teeth. Tooth loss begins around the age of 6 or 7, and by adolescence, all the primary teeth will have been replaced by permanent teeth. Regular dental check-ups and good oral hygiene are essential for maintaining healthy dental development.
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