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.
The 4 Types of Teeth
There are four types of teeth found in humans. Most other mammals have four types of teeth too.
Wisdom Teeth
Wisdom teeth also referred to as the third set of molars. They are the vestigial and final set of molars. This set of teeth appear between the age of 18 to 25. As per the reports and dentists advice, most of them remove their wisdom teeth, and this is mainly because of the poor alignment and partial eruption, which results in the bacterial infectious diseases, pain, swelling and stiffness of the jaw.
Diphyodonts and Polyphyodonts
Humans and other mammals, including geckos, vertebrates, and reptiles are all classified as diphyodonts, which means they possess two successive sets of teeth in their lifetime – milk teeth and permanent teeth.
Other vertebrates such as toothed fishes are classified as polyphyodonts, meaning that their teeth are continuously replaced during their lifetime. The only mammals which are polyphyodont are elephants, kangaroos and manatees.
Conclusion
In humans and other vertebrates, teeth play a fundamental role in the digestion and absorption process. Human beings eat food all through their lives. Hence, to withstand their prolonged use through years of chewing, teeth must be really hard and firmly anchored. The white, exposed part of the tooth is covered by enamel layer. This is the body’s hardest material.
Enamel is incredibly strong and is also translucent – which means light can be observed through it. Though enamel is the body’s hardest tissue, it has no living cells. This means that if the tooth gets chipped or broken, there is no way for it to repair itself.
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Answer:
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.
The 4 Types of Teeth
There are four types of teeth found in humans. Most other mammals have four types of teeth too.
Wisdom Teeth
Wisdom teeth also referred to as the third set of molars. They are the vestigial and final set of molars. This set of teeth appear between the age of 18 to 25. As per the reports and dentists advice, most of them remove their wisdom teeth, and this is mainly because of the poor alignment and partial eruption, which results in the bacterial infectious diseases, pain, swelling and stiffness of the jaw.
Diphyodonts and Polyphyodonts
Humans and other mammals, including geckos, vertebrates, and reptiles are all classified as diphyodonts, which means they possess two successive sets of teeth in their lifetime – milk teeth and permanent teeth.
Other vertebrates such as toothed fishes are classified as polyphyodonts, meaning that their teeth are continuously replaced during their lifetime. The only mammals which are polyphyodont are elephants, kangaroos and manatees.
Conclusion
In humans and other vertebrates, teeth play a fundamental role in the digestion and absorption process. Human beings eat food all through their lives. Hence, to withstand their prolonged use through years of chewing, teeth must be really hard and firmly anchored. The white, exposed part of the tooth is covered by enamel layer. This is the body’s hardest material.
Enamel is incredibly strong and is also translucent – which means light can be observed through it. Though enamel is the body’s hardest tissue, it has no living cells. This means that if the tooth gets chipped or broken, there is no way for it to repair itself.
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