Write a note on arrangement of teeth. [5 MARKS]
Write a note on arrangement of teeth. [5 MARKS]
Each point: 1 Mark
1. The first set of teeth called as primary teeth, encountered in the child, are 20 in number and are gradually lost during maturation.
2. In humans, a total of 32 teeth eventually form in the adult.They are called permanent teeth. Each adult jaw contains a set of four incisors, which are used for biting. They are shaped like arrowheads and are present in the middle of the arch.
3. These four are flanked on both sides by single canines, sharp tearing teeth, which are much longer in carnivorous animals like lions and tigers.
4. Towards the rear of the jaw is a pair of premolars and then three larger molars on each side. The premolars and molars are flattened, ridged teeth with large surfaces adapted for grinding and pulverizing food. The 16 teeth of the lower jaw are matched by 16 teeth in the upper jaw.
5. During biting and chewing, a near perfect articulation of upper and lower sets of teeth is vital for efficiently processing ingested food. Disarticulation may lead to pain, as well as poor processing of food.
Each point: 1 Mark
1. The first set of teeth called as primary teeth, encountered in the child, are 20 in number and are gradually lost during maturation.
2. In humans, a total of 32 teeth eventually form in the adult.They are called permanent teeth. Each adult jaw contains a set of four incisors, which are used for biting. They are shaped like arrowheads and are present in the middle of the arch.
3. These four are flanked on both sides by single canines, sharp tearing teeth, which are much longer in carnivorous animals like lions and tigers.
4. Towards the rear of the jaw is a pair of premolars and then three larger molars on each side. The premolars and molars are flattened, ridged teeth with large surfaces adapted for grinding and pulverizing food. The 16 teeth of the lower jaw are matched by 16 teeth in the upper jaw.
5. During biting and chewing, a near perfect articulation of upper and lower sets of teeth is vital for efficiently processing ingested food. Disarticulation may lead to pain, as well as poor processing of food.
