Can you eat after a filling?

The short answer, by filling type

When you can eat depends on two things: how long the local anesthetic lasts, and what the filling is made of. The numbness is the more important of the two for most people, because chewing while numb is how cheeks, lips and tongues get bitten without any warning.

Healthline's guide to eating after a filling gives the clearest breakdown, and Cleveland Clinic's overview of dental fillings explains the materials behind it.

• Composite (tooth-colored resin): the material is hardened by a curing light during the visit, so the filling itself does not need a waiting period. Your dentist may still suggest waiting one to three hours if you are numb.
• Amalgam (silver): it sets more slowly, and Healthline advises waiting about 24 hours before chewing on that side so it can fully harden.
• Anesthetic: numbness usually wears off in one to three hours but can last longer, depending on the type and amount used.

Why you should wait for the numbness to fade

Local anesthetic blocks feeling in the tooth, and usually in the nearby lip, cheek or tongue as well. You cannot tell how hard you are biting or where your tongue is, so it is easy to injure the soft tissue. Cleveland Clinic's advice is simple: wait until the numbness wears off before you eat, and if you eat sooner, chew slowly.

If you cannot wait, choose something soft that needs almost no chewing, take small bites, and chew on the side opposite the new filling. A hot drink is a poor choice while you are numb, because you may not notice that it is scalding your mouth.

Composite and amalgam: what is different

Cleveland Clinic describes the main direct filling materials as amalgam (silver-colored, a mixture of mercury with silver, tin, zinc and copper), resin composite (tooth-colored) and glass ionomer (also tooth-colored). A curing light hardens resin composite during the appointment, which is why a composite filling is usable quickly.

Amalgam takes longer to reach full strength. Healthline says amalgam is the type that benefits from a full day before you chew on it, and that sticky foods are a bigger risk for dislodging an amalgam filling than a composite one. If you do not know which material you received, ask the dental office before you eat anything hard or chewy.

What to eat after a filling

Soft, moderately warm foods are the easiest starting point. Healthline suggests yogurt, scrambled eggs, mashed potatoes, smoothies, lukewarm soup and pudding. They are gentle on a sore tooth and gums and need little chewing, so they will not put much pressure on a filling that is still settling.

Once the numbness has gone and the tooth feels comfortable, you can return to your usual diet in stages. Chew on the opposite side for the first day, and avoid biting all the way through hard foods.

What to avoid for the first day or two

A few food types cause most of the trouble in the first days after a filling.

• Hard foods such as hard candy, nuts and ice, which can cause pain and may dislodge a new amalgam filling.
• Sticky foods, which pull at a filling and are a bigger risk with amalgam.
• Sugary foods and drinks, which can trigger sensitivity and feed the bacteria that cause decay.
• Very hot or very cold items, which can set off sensitivity while the tooth settles.
• Biting down all the way through food on the filled side; Healthline suggests avoiding that for a while.

Sensitivity and soreness after a filling

Some soreness and sensitivity are normal. Healthline reports gum soreness and heat or cold sensitivity typically lasting one to three days, with pain usually peaking around 24 hours after the procedure and mostly gone within three days to a week. Cleveland Clinic says mild sensitivity and gum soreness typically fade within a week or two.

Sensitivity can last longer, in some cases for several months, and is more likely after deeper fillings that come close to the tooth's nerve. Warm salt water rinses and over-the-counter pain relievers such as ibuprofen can help if your dentist recommends them. Keeping your mouth closed in cold air can also reduce sharp twinges.

Check your bite

After the numbness fades, close your teeth together gently. If the filled tooth hits first or the bite feels uneven, tell your dentist. Healthline notes that a bite that still feels uneven after a few days can be adjusted, which is a quick fix compared with leaving a high filling to cause soreness or damage.

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