Give the differences between
milk teeth and permanent teeth
Answers
Answer:
As humans, we have two sets of teeth that erupt during our lifetime – the first set is called as milk teeth, primary teeth or baby teeth and they start erupting when we are 6 months old and the next set of teeth, called permanent teeth, begin erupting as we turn 6 years old.
Answer :-
So far, we saw that some difference between milk teeth and permanent teeth exists. However, let’s elaborate a bit on this!
Size
The most evident difference between milk teeth and permanent teeth is their size. Ask anyone and this is probably the first thing they would say, including children. Milk teeth are smaller than their permanent counterparts for the simple reason that they erupt very early on in the life of an individual when the lager permanent teeth cannot fit in their jaws.
Number
The next obvious difference between milk teeth and permanent teeth is the number of teeth. While we all have 32 permanent teeth, milk teeth are just 20 in number.
The 20 primary or milk teeth include – two pairs of upper and lower incisors, one pair of canines in each jaw, one pair of first molars and one pair of second molars in each jaw.
However, in the permanent dentition, in addition to the teeth present in the milk teeth set, we also have two pairs of premolars in each jaw and one pair of third molars in each jaw, taking the count to a total of 32 teeth.
Composition
The next difference between primary and permanent teeth is that the enamel layer on the primary teeth is much thinner than that in permanent teeth.
This difference between deciduous and permanent teeth is important because thinner enamel allows cavities to spread quickly. A thin enamel also means less surface area to bond cavity-filling material on the tooth when a part of the tooth has been lost to decay or fracture.