Teeth exposed yellow part of the dentin, biting something toothache is generally caused by dentin sensitivity, the specific mechanism of fluid dynamics theory, terminal conduction theory, dentin cell conduction theory, specific as follows.
1. Hydrodynamic theory: It is believed that the stimulus acting on the surface of dentin will cause the flow of fluid in the dentin tubules, and this flow will be transmitted to the pulp, which will cause the excitation of the pulpal nerve fibers to produce nociception.
2. Terminal conduction theory: It is believed that the pulpal nerve exists in dentin, and the sensation of the outside world can be transmitted from the surface of dentin to the pulp.
3. Dentin cell conduction theory: It is believed that there is a synaptic relationship between the dentin cell protrusions and the nerve, which can exercise the function of nerve receptors.
If the above symptoms occur, it is recommended to go to the hospital in time to receive professional treatment.