For most modern fillings, you can brush your teeth the same day, but you should wait at least a few hours and use a gentle touch. The exact timing depends on the type of filling material your dentist used, since different materials harden at different rates.
Composite (Tooth-Colored) Fillings
Composite resin fillings are cured with a special UV light during your appointment, which means they harden almost immediately. You can brush the filled tooth within a few hours of leaving the dental office. That said, gentle technique matters more than speed. Use a soft-bristled toothbrush, move in small circular motions, and avoid scrubbing hard over the new filling. Aggressive brushing in the first day or two can potentially dislodge the material before it fully bonds to the tooth structure.
Switching to a toothpaste designed for sensitive teeth for a week or so can also help, since mild sensitivity around a new filling is common.
Amalgam (Silver) Fillings
Silver amalgam fillings take much longer to fully set than composites. The material continues hardening for roughly 24 hours after placement, so you should wait at least a full day before brushing directly over the filling with any real pressure. You can still brush the rest of your mouth normally during that window. When you do start brushing the filled tooth, use the same gentle approach: soft bristles, light pressure, circular motions.
Temporary Fillings
Temporary fillings are made from softer materials like zinc phosphate cement or glass ionomers, and they’re not designed to last. You can brush over a temporary filling, but you need to be especially careful. Use a soft or extra-soft bristled toothbrush and brush gently but thoroughly. These fillings can crumble or pull loose under too much force.
When flossing near a temporary filling that reaches the edge of your tooth, slide the floss out from the side rather than pulling it straight up. Snapping floss upward can catch on the filling’s edge and pull it out entirely.
Wait Until the Numbness Wears Off
Regardless of filling type, the most important rule is to wait until your local anesthesia has fully worn off before brushing. When your mouth is numb, you lose the ability to feel how much pressure you’re applying. You also can’t tell if you’re biting your cheek, lip, or tongue. Studies on dental anesthesia complications report that about 3% of patients accidentally injure their lip while numb, with smaller percentages injuring their cheek or tongue. Brushing while numb raises the same risk: you could scrub too hard on your gums or bite down on soft tissue without realizing it.
Numbness from a standard filling appointment typically fades within two to four hours, though it can last longer depending on the type and amount of anesthetic used. Once you have full feeling back, you’re safe to brush.
How to Floss Around a New Filling
Flossing follows similar timelines. With composite fillings, you can floss the same day once numbness has worn off. With amalgam fillings, some dentists recommend waiting until the next day before flossing aggressively around the filled tooth.
For the first few days after any filling, floss gently around the area. Slide the floss between your teeth slowly, move it up and down along the sides of each tooth, and pull it out from the side rather than snapping it upward. Forcing floss down onto the gumline or yanking it out can irritate already-sensitive tissue or catch on the edge of a new filling.
What to Expect in the First Few Days
Some sensitivity to hot, cold, or pressure around a new filling is normal and usually fades within a week or two. During this period, a toothpaste for sensitive teeth can make brushing more comfortable. If you notice sharp pain when biting down, or if sensitivity gets worse instead of better after a couple of weeks, the filling may need a minor adjustment. A high spot on the filling, where it sits slightly above your natural bite, is one of the most common causes and is a quick fix.
You should also avoid hard foods like ice, nuts, and hard candy on the side of the filling for the first day or two, especially with amalgam or temporary fillings. Sticky foods like gum, toffee, and caramel are worth skipping temporarily as well, since they can pull at filling material that hasn’t fully bonded or set.