Question

The number of incisors, molars, premolars, and canines in the buccal cavity is
(A)8,4,8,8
(B)8,4,8,4
(C)4,8,8,8
(D)8,8,8,4

Answer 1

Hint: A dental formula is used to express the number and types of teeth present in any organism. It is usually written as an expression of the number of each type of tooth on one side of the upper jaw over the number of teeth on one side of the lower jaw. The dental formula of an adult human being is found to be 2123/2123.

Complete answer:
-Incisors – Human incisors are found to be eight in number. These are known to be the first set of teeth we have at the age between six and eight years old. These types of teeth are very commonly used for biting food particles.
-Canines – Our canines are known to be the next teeth that develop in your mouth. Human beings have four canines and they are the sharpest teeth, used for tearing apart food.
-Premolars - Premolars are majorly used for crushing and tearing of food. Humans have eight premolars in total.
-Molars - Molars are known to be the human's largest teeth. Their function is to grind, tear, and crush food. They are eight in number.
-Wisdom teeth- They erupted later in life, somewhat at age of 12 or 13. It can arise later also. They are four in number.

Additional Information:
Two more types of morphological arrangements are seen in different animals. They are as follows-
Acrodont teeth are found to be fused to the edge of the mandibles and the maxillae.
Pleurodont teeth are attached to the medial surface of the mandibles and maxillae. It is often seen that pleurodont teeth will regenerate if lost or broken, but acrodont teeth will not regenerate.
In human beings, tooth morphology is explained as diphyodont, thecodont, and heterodont.
The heterodont means a condition in which there are different types of teeth present.

So, the correct answer is ‘8,8,8,4’.

Note: The term ‘Thecodont’ is used to denote a morphological arrangement in which the base of the tooth is completely enclosed in a deep socket of bone. This type of arrangement is commonly seen in crocodilians, dinosaurs, and mammals.
A diphyodont condition is seen in many animals that have two sets of teeth in their lifetime i.e first set is temporary and falls after a while. The second set of teeth replace the first set and now these are permanent now.