Dental fillings don’t get worse the more they are filled. Dental fillings are a method of treating dental caries, where the doctor thoroughly cleans out the blackened and decayed part of the tooth, and then fills in the bad part with filling material. The process of filling the tooth will not cause damage to the undamaged part of the tooth, and will not cause more and more rottenness. However, if you do not pay attention to oral hygiene after the filling, secondary caries may still occur, resulting in tooth decay. After the filling, the patient must maintain oral hygiene, morning and evening to brush carefully, regular oral examination.