Types of dentition?

1. Deciduous dentition (primary dentition or baby teeth)
2. Permanent dentition (adult teeth)
3. Mixed dentition (a combination of both deciduous and permanent teeth)
4. Heterodont dentition (different types of teeth for different functions, such as incisors, canines, premolars, and molars)
5. Homodont dentition (all teeth are similar in shape and function)
6. Diphyodont dentition (two sets of teeth in a lifetime, such as in humans)
7. Polyphyodont dentition (multiple sets of teeth continuously replaced throughout the animal's life, such as in sharks)

- Deciduous dentition (also known as baby teeth or milk teeth) consists of 20 teeth: 10 in the upper jaw and 10 in the lower jaw. Deciduous teeth begin to erupt at around 6 months of age and are all usually present by age 3. They are gradually replaced by permanent teeth starting at around age 6 and are all usually gone by age 12.
- Permanent dentition consists of 32 teeth: 16 in the upper jaw and 16 in the lower jaw. Permanent teeth begin to erupt at around age 6 and are all usually present by age 21. They are designed to last a lifetime, but can be lost due to decay, periodontal disease, or injury.
- Mixed dentition is the term used to describe the period of time when both deciduous and permanent teeth are present in the mouth. This period typically lasts from around age 6 to age 12.