1) What Do You Understand by Dental Formula of Human?
- The formula used to calculate the number and types of teeth present in both jaws is called the dental formula.
- The dental formula for humans is—
![dental formula for humans](https://cdn-cms.orchidsinternationalschool.com/media/lc-science-types-of-teeth.png)
2) What Keeps Your Teeth Fixed in Place?
- Teeth are fixed in socket-like structures present in the upper and lower jaw.
- This fixation is not superficial; rather, the teeth are fixed deep inside the boxes of the upper jaw and lower jaw called maxilla and mandible, respectively.
- The jaw bones are the skull's strongest bones, and only the lower jaw, i.e., the mandible, is movable.
![jaw bones are the skull's strongest bones](https://cdn-cms.orchidsinternationalschool.com/media/answer/G5_2_Digestion-and-Teeth.jpeg)
3) How Are Teeth Different From Bones?
Teeth are different from bones in the following aspects—
- Teeth are covered by a layer called enamel, which makes them stronger than bones.
- Bones are protected by layers of muscles and skin, but teeth are not.
- Bones can produce new red blood cells in their central cavity, called bone marrow, but teeth cannot.
4) What Does a Healthy Tooth Look Like? Which Substance Is Responsible for That Appearance?
- Healthy teeth appear bright white, and shiny.
- Calcium phosphate present in the enamel gives the characteristic colour to the teeth.
5) Do Your Teeth Resemble Your Parents or Siblings?
- Every person has different shapes and arrangements of teeth.
- Like no two people can have the same DNA and fingerprints; similarly, no two people can have the same shape and arrangement of teeth.
![teeth](https://cdn-cms.orchidsinternationalschool.com/media/answer/G5_5_Digestion-and-Teeth.jpg)