Types of Dentation | thecodont, diphyodont &heterodont neet 2023

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Humans, like most other mammals, develop two different sets of dentition called the deciduous dentition (or primary dentition, baby teeth, or milk teeth), and the permanent dentition (or secondary dentition, or adult teeth).

NCERT
The alimentary canal begins with an anterior opening – the mouth, and it opens out posteriorly through the anus. The mouth leads to the buccal cavity or oral cavity. The oral cavity has a number of teeth and a muscular tongue. Each tooth is embedded in a socket of the jaw bone (Figure16.2). This type of attachment is called thecodont. The majority of mammals including human beings form two sets of teeth during their life, a group of temporary milk or deciduous teeth replaced by a set of permanent or adult teeth. This type of dentition is called diphyodont. An adult human has 32 permanent teeth which are of four different types (Heterodont dentition), namely, incisors (I), canine (C), premolars (PM), and molars (M). The arrangement of teeth in each half of the upper and lower jaw in the order I, C, PM, and M is represented by a dental formula that in humans
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