Will filling a tooth make it decay more over time?

In general, whether a filling will deteriorate over time mainly depends on post-treatment care. If discomfort occurs, it is recommended to seek timely medical attention. The details are as follows:

1. No

Dental fillings are a method of restoring damaged tooth structure using artificial materials. If patients maintain good oral hygiene after the procedure—such as regular brushing, flossing to clean between teeth, and routine dental checkups and cleanings—the filling typically will not progressively worsen.

2. Yes

If oral hygiene is neglected after a filling—for example, by failing to brush regularly or use floss to remove food debris trapped between teeth—these poor habits can promote bacterial growth, leading to further tooth decay. Particularly, the edges of the filling material are prone to accumulating plaque and debris. Without proper cleaning, bacteria can proliferate in these areas, causing new cavities and worsening the condition of the tooth. In such cases, repeated fillings may lead to progressive deterioration.

To avoid unnecessary harm to the body, it is advisable to follow the dentist's instructions. Maintaining good daily oral hygiene, having regular dental checkups, and avoiding hard foods can effectively reduce the risk of tooth deterioration after a filling.