Question

Dental formula of a human being is
A. $2I,2C,1P,3M$
B. $2I,1C,2P,3M$
C. $3I,1C,2P,2M$
D. $2I,2C,3P,1M$

Answer 1

Hint: The dental formula in human beings is the description of the number of teeth with their types present in the half upper or lower jaw. The total number of teeth in adult humans is 32. The upper and the lower jaw have 16 teeth each having 4 incisors, 2 canines, 4 premolars, and 6 molars.

Complete step by step answer: The dental formula for human teeth is defined as the number of teeth present in each half of the lower as well as the upper jaw. The formula derived is then multiplied by 2 to represent the total number of teeth present in both the jaws.
-The types of teeth present in the human jaw are classified based on their shape and function. The incisors are the front teeth that are used to cut off food and to hold on to the food.
-The canines are present beside the incisors and are cone-shaped that help in tearing apart the food.
-The premolars are next to canines and are broader as compared to canines. They help in chewing the food.
-Next to premolars are molars that are broader than premolars and help in the fine grinding of food.
-The milk teeth or temporary teeth in humans include 2 incisors, 1 canine, 0 premolar, and 2 molars in each half of the upper and lower jaw.
-But an adult human jaw consists of 2 incisors $(I)$, 1 canine $(C)$, 2 premolars $(P)$, and 3 molars $(M)$ in each half of the upper and lower jaw making 4 incisors, 2 canines, 4 premolars, and 6 molars in the lower and upper jaw individually.
Thus, the right answer is option B.

Note: An adult human jaw consists of a total of 32 teeth. But it is not always the same in all adults. One of the three molars is the knowledge teeth which are present in some adults and is absent in some.