Cavities need to be filled. However, teeth that need to be extracted, such as erupting baby teeth and wisdom teeth, have cavities that do not need to be filled.
1. If tooth decay is not repaired in time, the decay will develop deeper, and in serious cases, pulpitis and periapical inflammation will occur, which will cause discomfort such as facial swelling, generalized fever, and chills, and even lead to bacteremia, which is dangerous to your life.
2. However, like some cavities are milk teeth, if the milk teeth will be replaced soon, usually can not be filled, direct extraction can be; there are like wisdom teeth, multiple teeth and other teeth need to be extracted, although it is the permanent teeth occurring insect teeth, but for the multiple teeth or the position of the teeth to grow askew, usually do not need special treatment, can be directly extracted from the teeth.
Note that tooth decay should be treated in a timely manner according to the specific situation.