Which of the following is not related to human teeth ?

Options

A. Enamel
B. Dentalium
C. Crown
D. Root of tooth

Answer

To solve the question "Which of the following is not related to human teeth?", we will analyze the options provided and determine which one does not pertain to human dental anatomy.

### Step-by-Step Solution:

1. **Understanding Human Teeth Structure**:
- Human teeth are primarily composed of two main parts: the crown and the root.
- The crown is the visible part of the tooth, and it is covered by a hard substance called enamel.
- The root is embedded in the jawbone and is not visible.

2. **Types of Human Teeth**:
- Humans typically have 32 teeth, which can be categorized into four types:
- **Incisors**: 8 teeth (4 on the top and 4 on the bottom)
- **Canines**: 4 teeth (2 on the top and 2 on the bottom)
- **Premolars**: 8 teeth (4 on the top and 4 on the bottom)
- **Molars**: 12 teeth (6 on the top and 6 on the bottom)

3. **Analyzing the Options**:
- The question asks to identify which option is not related to human teeth.
- Based on the information provided in the transcript, we can evaluate the options:
- **Enamel**: This is related to human teeth as it covers the crown.
- **Crown**: This is a part of the tooth structure.
- **Root**: This is also a part of the tooth structure.
- **Dentalum**: This refers to a genus of tooth cells found in molluscs, which is not related to human teeth.

4. **Conclusion**:
- The option that is not related to human teeth is **Dentalum**.

### Final Answer:
The correct answer is **Dentalum**.

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