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Question : Give types of teeth and describe the arrangement of teeth in mouth with diagram. |
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Answer» Solution :Thecodont: Each tooth is embedded in a socket of 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 : Majority of Mammals including human beings forms two sets of teeth during their life. (i) Deciduous or milky teeth (ii) Permanent or Adult teeth. The number of milk teeth is 20. The DENTAL formula of a child is `(2 1 0 2)/(2 1 0 2)` An adult human has 32 permanent teeth which are of four different types. There are 16 teeth in each jaw. If we see its order, In the middle (Incisors-I), One canine (Canine-C), two premolars (PREMOLAR - PM) and three molars (Molar-M), Arrangement of teeth in each HALF of the upper and lower jaw in the order I, C, PM,Mis represented by a dental formula which in human is `(2 1 2 3)/(2 1 2 3)`. The hard chewing SURFACE of the teeth is made up of enamel.
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