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What is the difference between primary teeth and permanent teeth?

May 13, 2023 Source: Cainiu Health
Dr. Zhang Liwen
Introduction
Deciduous teeth and permanent teeth are two types of human dentition, differing mainly in three aspects: number of teeth, size and shape of teeth, and tooth color. The number of teeth differs between permanent and deciduous teeth. There are 20 deciduous teeth in total, whereas there are 32 permanent teeth. Deciduous teeth typically begin to erupt around the age of 3, and are gradually replaced by permanent teeth until approximately 12 years of age.

Deciduous teeth and permanent teeth are two types of human dentition, differing mainly in three aspects: number of teeth, size and shape, and color. A detailed analysis is as follows:

1. Difference in Number of Teeth

Deciduous and permanent teeth differ in quantity. There are 20 deciduous teeth in total, whereas there are 32 permanent teeth. Deciduous teeth typically begin to erupt around age 3 and are gradually replaced by permanent teeth by about age 12. As individuals grow and develop, some may develop additional teeth, such as wisdom teeth. These extra teeth belong to the permanent dentition, not the deciduous.

2. Difference in Size and Shape

Permanent teeth are larger, stronger, and more complex in shape than deciduous teeth, featuring more ridges, grooves, and cusps. This is because permanent teeth require greater strength for chewing food and are meant for long-term use. In contrast, deciduous teeth are smaller and simpler, with shorter crowns and thinner roots. The differences in size and shape between deciduous and permanent teeth serve as an important distinguishing feature.

3. Difference in Color

There is also a difference in color between permanent and deciduous teeth. Deciduous teeth are usually whiter in appearance, while permanent teeth tend to be slightly yellower. This is due to the fact that the enamel of permanent teeth is thicker, and the underlying dentin is somewhat darker in color. Additionally, as people age, tooth color gradually darkens, which further contributes to the color difference between deciduous and permanent teeth.

In summary, deciduous and permanent teeth differ in several ways, including number, size and shape, and color. Therefore, understanding these differences is crucial for both dental professionals and patients, as it aids in accurate diagnosis and treatment, as well as in developing effective plans for preventing dental problems and maintaining oral health.

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