Question

a. Contrast the unique features of incisors and a canine tooth. b. What is the usual number of premolars in an adult's mouth? c. Identify the different molars and ages they develop?

Answer 1

Incisors:

The 4 front teeth in both upper and lower jaws called incisors

The primary function is to cutting and shearing food

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.

1 st tooth to erupt oral cavity is mandibular incisor

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.

The 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.

B. They are 8 premolars between canines and molars

C. Molars are simply large teeth with a flatter surface that are used to chew food into small, easily consumable pieces. The word molar is developed from Latin, molaris dens, meaning "millstone tooth", from mola, millstone and dens, tooth. They are 12 molars

Primary molars, also known as deciduous molars, appear between 12 and 28 months, and are replaced by the first and second premolars (four upper and four lower)

The permanent molars (also four upper and four lower) do not replace any primary teeth, but come in behind all of them, further back in the jaw. The first permanent molars erupt at around age 6 (before the primary molars fall out), while the second molars come in between ages 11 and 13.

Wisdom teeth, or third molars, are often referred to as third molars because they are the last teeth to come into the mouth. Many often get their wisdom teeth removed; these teeth sit so far back in the jaw that they can often cause issues if not removed. It is evolved at age of 18-20