Question

Upper molars in the human dentition have
a) Four roots
b) Three roots
c)Two roots
d)Single root

Answer 1

Hint The teeth of humans are of different types and are used for different purposes. The teeth are composed of the upper crown part and the lower root part which is present in the jaw. The teeth are composed of hard substances like enamel, dentine, and cementum.

Complete answer: In humans, four types of teeth can be found which are incisors, canines, premolars, and molars. The root of the teeth is located in the jaw of the mouth. The canines and the premolars have one root present. the upper first premolar and the lower molars consist of two roots present in them. The upper molar has three roots present in them. The incisors are the front teeth present in humans. They are used for cutting and biting the food. They are flat and have a thin edge. Canines are the pointed sharp teeth that lie next to the incisors. They give a fang-like appearance. They are used for tearing the food. They are considered the longest teeth. Premolars are bigger than the incisors and canines. They help in the chewing and grinding of the food. Children do not have the premolars teeth; they are only present in adults. Molars are the biggest teeth of all. They are large in size and are flat. They help in the chewing and grinding of the food materials.

So, the answer is ‘three roots.

Note: The children have milk teeth or the temporary teeth which shed themselves at a certain age and a new set of permanent teeth appear. The number of the temporary and the permanent teeth varies. Last molars to come are the wisdom teeth. They appear at the corner of the jaw and sometimes don’t appear at all.