Some typical features of primary dentition:
1. Number of teeth: The primary dentition consists of 20 teeth in total. This includes 10 teeth in the upper jaw (maxilla) and 10 teeth in the lower jaw (mandible).
2. Tooth types: The primary dentition includes the following types of teeth:
- Incisors: There are four incisors in each jaw (two central incisors and two lateral incisors). They have sharp, chisel-like edges and are used for biting and cutting food.
- Canines: There are two canines in each jaw. They have a pointed tip and are used for tearing and grasping food.
- First molars: There are two first molars in each jaw. They have broad, flat surfaces and are used for grinding and chewing food.
- Second molars: There are two second molars in each jaw. They are located behind the first molars and also assist in grinding and chewing food.
3. Smaller size: Compared to permanent teeth, primary teeth are smaller in size. They have a more rounded appearance and are generally whiter in color.
4. Spacing: Primary teeth typically have more space between them compared to permanent teeth. This spacing allows room for the larger permanent teeth to erupt properly later on.
5. Enamel characteristics: The enamel of primary teeth is relatively thinner than that of permanent teeth. This makes primary teeth more susceptible to tooth decay and cavities.
6. Eruption timeline: Primary teeth generally start erupting around six months of age, with the lower central incisors usually being the first to appear. The eruption process continues until around two to three years of age when all 20 primary teeth are usually present.
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