Root surface caries often occurs in areas where the gums are severely receding, the roots of the teeth are exposed and the roots are poorly self-cleaning.
There are various microorganisms in the mouth, when the roots are exposed in the mouth, if the teeth are not brushed properly in daily life, the plaque on the surface of the roots remains and is not cleaned in time and effectively, the plaque stays and forms caries in the long run. This is the time to go to the dentist to fill the bad tooth in time.