White composite resin fillings can last from five years to more than 10 years. There are several factors that influence the long-term results of your restorative treatment. Keep in mind, this is true of silver fillings, crowns, and all types of dental restoration. In addition to the size and location of the filling, results are affected by factors such as:
Your oral hygiene. Brushing and flossing your teeth as advised by your dentist is just as important for the areas around composite fillings as for teeth that have never been damaged. Your filling covers only a portion of your tooth, so new decay can form around it. Brushing and flossing properly around the filling can protect its margins and help it last longer.
Personal habits. There is a greater chance of your filling wearing down more quickly if you have a habit of biting or chewing on hard objects. This can damage a filling or any other restoration just as it can your natural teeth.
Bruxism. You may not bite or chew hard objects like ice, but if you clench or grind your teeth, your fillings may not last as long as they could otherwise. Talk to your dentist about this aspect of your oral health. A brief exam can identify signs of bruxism if you’re not sure whether you do it. Bruxism usually occurs during sleep, so you may not be aware of your habit. If you do clench or grind, your dentist can make a comfortable night guard to wear when you sleep to protect not only your fillings but your teeth and gums.