Best root canal clinic in Adambakkam | How Long Do Dental Fillings Last? Dental fillings don’t come with an exact expiry date, but they wear down gradually over time due to chewing pressure, grinding, and daily use. The lifespan of a filling depends on factors like the material used, your oral hygiene, and whether you have habits such as clenching or biting hard foods. If a filling starts leaking, cracking, or causing sensitivity, it may be time for a replacement. Watch out for signs like food getting stuck, pain while biting, or visible wear. At Dr. Akkshaya Dental & Aesthetics, Adambakkam, we assess your fillings during routine checkups to ensure they stay strong and trouble-free.