Question

1.
Give the total number of teeth.
2. Name the different types of teeth.
3.
Which of these is used for grasping and tearing? How many such teeth do an adult jaw have?
4. What is the use of incisors?​

Answer 1

total 32

incisors canines molars and premolar

tearing_____ canines_____ 2 teeth

use of incisors

for cutting food particles into pieces

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Answer 2

1} 32

2} There are 4 types of teeth in the oral cavity:

Incisors – The four front teeth in both the upper and lower jaws are called incisors. Their primary function is to cut food. The two incisors on either side of the midline are known as central incisors. The two adjacent teeth to the central incisors are known as the lateral incisors. Incisors have a single root and a sharp incisal edge.

Canines – There are four canines in the oral cavity. Two in the maxillary arch and two in the mandibular area. They are behind and adjacent to the lateral incisors. Their main function is to tear food. They have a single, pointed cusp and a single root. They have the longest root of any tooth. They also serve to form the corners of the mouth.

Premolars (Bicuspids) – These teeth are located behind and adjacent to the canines and are designed to crush food. There are eight premolars in the oral cavity. There are two in each quadrant of the mouth. The one closest to the midline is the first premolar and the one farthest from the midline is the second premolar. These teeth can have 3-4 cusps. The maxillary first premolar has two roots, and the remaining premolars have a single root. There are no premolars in the primary dentition.

Molars – The most posterior teeth in the mouth are the molars. They have broader and flatter surfaces with 4-5 cusps. They are designed to grind food. Molars typically have two roots, although the maxillary first molar (behind the second premolar) has three roots. There are 12 molars in the permanent dentition with three in each quadrant of the mouth. They are named starting with closest to the midline as first molars, second molars and third molars. Although, some people do not fully develop the third molars. Third molars are often referred to as wisdom teeth. The primary dentition only contains eight molars.

3} Mammals have four types of teeth, each with a specific task to handle for different kinds of food. Incisors are used for cutting. Canines are for tearing. Premolars are used for crushing, and molars are used to grind up food.

4} The incisors at the front of the mouth have a sharp biting surface and are used for cutting or shearing food into small chewable pieces. There are eight incisors in both primary and permanent dentitions. The canines are situated at the 'corners' of the dental arches. They have a sharp, pointed biting surface.

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