01/12/2020
Our Tooth has has 5 Components (Enamel/Dentin/Pulp chamber and Canal/Cementum/Periodontal Ligaments in 2 parts (Crown/Root)...
Crown portion has Enamel/Dentin/Pulp Chamber..... And Root portion has Periodontal Ligaments/Cementum/Dentin/Pulp Canal......
In which Enamel is Only Ectodermal Origin (Inorganic material) thats why it is Non sensitive part....
And Other parts are Sensitive due to Mesenchymal Origin (Organic material).....