Question
Biology Question on Parts of the digestive system
The primary dentition in human differs from permanent dentition in not having one of the following type of teeth. deficiency disease caused by lack of thiamine (vitamin B)
A
Molars
B
Incisors
C
Canines
D
Premolars
Answer
Premolars
Explanation
Solution
Milk/primary teeth of man include 8 incisors, 4 canines and 8 molars (premolars are absent). Molars of milk teeth are shed off and premolars of permanent teeth take their place. The permanent teeth are 8 incisors, 4 canines, 8 premolars and 12 molars. Thus 12 teeth (8 premolars and 4 molars) are monophyodont (teeth which grow only once in life). Dental formulae of milk teeth and permanent teeth of human are given below.