(N/A) Thecodont: Each tooth is embedded in a socket of the jaw bone. This type of attachment is called thecodont.
Diphyodont: At the age of $6$ years,a set of temporary milk teeth or deciduous teeth are replaced by a set of permanent or adult teeth. This type of dentition is called diphyodont.
Types of Teeth: The majority of mammals,including human beings,form two sets of teeth during their life:
$(i)$ Deciduous or milk teeth
(ii) Permanent or adult teeth
The number of milk teeth is $20$. The dental formula of a child is $\frac{2102}{2102}$.
An adult human has $32$ permanent teeth which are of four different types. There are $16$ teeth in each jaw. The arrangement of teeth in each half of the upper and lower jaw in the order of Incisors $(I)$,Canines $(C)$,Premolars $(PM)$,and Molars $(M)$ is represented by a dental formula,which in humans is $\frac{2123}{2123}$.
The hard chewing surface of the teeth is made up of enamel.