Question

Q1. Describe the types
of teeth.​

Answer 1

Answer:

While different numbers abound, it's generally accepted that we have three different types of teeth: Incisors, canines, and molars. Yet, many will happily distinguish between the three different types of molars, including premolars and third molars.

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Answer 2

Answer:

✯Types of Teeth in Humans

☆Incisors

Incisors are present at the front of the mouth. These teeth have sharp edges and are adapted for cutting food into small, chewable pieces. Humans have eight incisors, four incisors in the upper jaw and four in the lower jaw.

☆Canines

Canines are also called cuspids. They are situated at the ‘corners’ of the dental arches. They are characteristically sharp, elongated and pointy surface. Their primary function is to grip and tear food (tough food such as meat). Humans have four canines, two in the upper jaw and two in the lower jaw.

☆Premolars

Premolars are also called bicuspids and are located behind the canines. These teeth have a flat surface with ridges, which is adapted for crushing and grinding food into smaller portions. Humans have eight premolars, two on each side of the jaws.

☆Molars

Molars are the largest and strongest teeth. It has a large and flat biting surface, which is well-adapted for grinding food. Humans have 12 molars, six in each jaw. Four of those are wisdom teeth, which is also called the third molar, which come in between the ages of 17 to 25.

Explanation:

◉LET'S EXPLORE MORE

✯What is teeth

A tooth or teeth is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are covered by gums.

✯Human Teeth

Humans have different types of teeth that perform various functions such as cutting, tearing, shearing, grinding and crushing. The teeth are powered by the jaw muscles and lubrication is done with the help of saliva, which is produced in the salivary glands.

Teeth are one of the strongest parts of the human body. It is mainly composed of proteins (collagen) and minerals (calcium). Apart from the digestion, teeth also play an important role in our speech. An adult will have 32 teeth, including the Wisdom teeth. Molars are the first permanent teeth to develop in, and most of the adults will have their complete set of permanent teeth in place by the age of 21.

Overall adults have 32 teeth in total, called permanent or secondary teeth, and it includes:

• Eight incisors – Four incisors in the upper jaw and four incisors in the lower jaw.

• Four canines – Two canines in the upper jaw and two canines in the lower jaw.

• Eight premolars– Four premolars in the upper jaw and four premolars in the lower jaw.

• Twelve molars- Six molars in the upper jaw and six in the lower jaw. It also includes four wisdom teeth.

Babies are born toothless as their primary source of food is mother’s milk. As the babies start to wean, milk teeth gradually start to appear. Milk teeth get replaced by permanent teeth by the time the individual turns six years old. Among the four types of teeth, the lower incisors are the first primary teeth to develop in, and most kids will have all their twenty primary teeth by age 3, which includes:

• Eight incisors – Four incisors in the upper jaw and four incisors in the lower jaw.

• Four canines – Two canines in the upper jaw and two canines in the lower jaw

• Eight molars – Four molars in the upper jaw and four molars in the lower jaw.

✯Fascinating Facts About Teeth

• While not as precise as fingerprints, teeth can be used to determine exact age and the ethnicity of a person by analysing the size and dental features.

• Humans produce only 2 sets of teeth during a lifetime, sharks, on the other hand, produce hundreds of sets of teeth during its lifetime.

• Megalodon was the largest shark to have ever lived, its average teeth size is between 4 to 5 inches. Even larger specimens have been discovered with teeth measuring over 7 inches in length.

• Dolphin teeth have concentric rings similar to growth rings found in trees. This enables age identification of dolphins by analysing the cross section of its teeth.

• The sharpest set of teeth in the animal kingdom belonged to an extinct eel-like vertebrate that roamed the earth 500 million years ago. Their teeth tapered down to 1/12 the width of a human hair. This means they can chomp through large amounts of flesh with minimal effort.

• Narwhals are whales that found in the Arctic, they have a long tusk that projects from their face. However, these tusks are actually overgrown teeth.

• Elephant tusks are essentially long incisors.

• The largest canines of any land animal belong to the hippopotamus. However, they use these canines only for battle or to fend off predators.