General dentistry

Temporary Filling: What It Is, How Long It Can Stay and When It Hurts

Dr. Cléo Salustiano
08 Nov 2026 · 7 min read
Updated 08 Nov 2026
Cover of the article 'Temporary Filling: What It Is, How Long It Can Stay and When It Hurts', from the dental office of Dr. Cléo Salustiano, dentist in Mooca, São Paulo.
Summary
Quick summary of this article+

A temporary filling is placed between root canal visits, after deep decay, in emergencies or while waiting for a permanent piece. It protects the tooth for a short time, usually weeks, and should be replaced on the agreed date, because it wears and can let bacteria in. A permanent restoration, in resin, ceramic or a crown, is made to last years. With a temporary, chew on the other side and avoid hard and sticky foods. Strong pain, swelling or a temporary that fell out call for contacting the dentist. In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients every day, from 8 a.m. to 10 p.m.

A temporary filling is a material the dentist places to close a tooth for a short time, between treatment visits or while waiting to see how the tooth responds before the permanent filling. It protects the tooth and what is inside it, but it is not made to last: it usually stays for weeks, not months, and should be replaced on the date agreed with your dentist.

In clinical practice, patients often feel the tooth is "fine now" and skip the visit to replace the temporary filling. The problem is that temporary material wears, can crack and let saliva and bacteria in, which may compromise a root canal treatment or let decay come back. The temporary filling is a step, not the end of treatment.

Dr. Cléo Salustiano (CRO-SP 170844), a dentist in Mooca, explains the difference between temporary and permanent fillings, how long a temporary can stay, how to care for it and what to do if it hurts or falls out.

This article comes from Dr. Cléo Salustiano's dental office in Mooca, São Paulo (care in English, Portuguese and Spanish). See the general dentistry page to learn how the treatment is done here and book your assessment.

What a temporary filling is for and how it differs from a permanent one

Temporary fillings are used in a few common situations: between root canal visits, to keep the inside of the tooth sealed; after removing very deep decay, when the dentist wants to see how the pulp reacts before the final filling; in an emergency, to relieve pain and protect the tooth until the next visit; and while waiting for a crown or another lab-made piece.

The most common temporary materials are cements that harden in the mouth, some of them on contact with saliva. They seal well for a while but resist wear and chewing less than the composite resin or ceramic used in permanent restorations. That is why a temporary can look whiter, feel rougher or slowly "sink".

A permanent restoration is made to stay: usually composite resin, or a ceramic piece or crown when the tooth has lost a lot of structure. It is adjusted to the bite, polished and designed to last years with proper care.

How long a temporary filling can stay depends on why it was placed and on the material, and your dentist decides. As a general reference, it is designed for weeks. The longer it stays beyond the plan, the greater the risk of wear, leakage and treatment having to be redone. The article how many visits a root canal takes explains why root canals are sometimes done in more than one step.

Temporary filling vs permanent filling
AspectTemporary fillingPermanent restoration
PurposeSeal and protect the tooth for a short timeRebuild the tooth for the long term
How long it staysWeeks, until the agreed dateYears, with check-ups
MaterialTemporary cementsComposite resin, ceramic or crown
Chewing resistanceLower; can wear and crackHigher; adjusted to the bite
If it falls out or loosensSee the dentist promptlySee the dentist for an assessment

Caring for a temporary filling and what to do if it hurts or falls out

In the first hours, follow your dentist's advice about eating: many temporary materials finish hardening after you leave the office. While it is in place, chew on the other side, avoid very hard or sticky foods (hard candy, chewing gum, nuts, pork rinds) and do not poke the area with your tongue, toothpicks or nails. Brush normally and gently, and slide floss out to the side instead of snapping it up.

Some sensitivity in the first days can happen, especially after a root canal visit or deep decay. Strong, throbbing pain, pain that wakes you at night, facial or gum swelling, a persistent bad taste or fever are not expected and call for contacting your dentist as soon as possible.

If the temporary fell out, broke or has a hole, do not wait for your return date: the tooth is exposed and, in a root canal, can become contaminated. Avoid chewing on that side, keep the area clean and book a visit. Do not try to seal the tooth with home products, wax, gum or glue. The article filling fell out: what to do has more guidance.

This content is for information only and does not replace an assessment. Consult a dentist whenever a temporary filling hurts, is loose or has stayed past the agreed date. In Mooca, Dr. Cléo Salustiano sees patients every day, from 8 a.m. to 10 p.m., including Sundays and holidays, for general dentistry, root canal treatment and dental emergencies.

Frequently asked questions: general dentistry

What is a temporary filling?

+

It is a provisional restoration made with a material that seals the tooth for a short time. It is used between root canal visits, after removing deep decay, in emergencies or while waiting for a permanent filling or crown.

How long can I keep a temporary filling?

+

It depends on the reason and the material, and your dentist decides. In general, a temporary is designed for weeks. Going well past the date raises the risk of wear, leakage and having to redo treatment, so keep your return appointment.

Is it normal for a tooth with a temporary filling to hurt?

+

Mild sensitivity in the first days can happen, especially after a root canal visit. Strong or throbbing pain, pain at night, swelling, fever or a persistent bad taste are not expected and call for contacting your dentist promptly.

What is the difference between a temporary and a permanent filling?

+

A temporary protects the tooth for a short time and uses less resistant materials. A permanent restoration rebuilds the tooth to last years, with composite resin, ceramic or a crown, adjusted to the bite and polished.

How long does temporary filling material take to harden?

+

It varies by material. Some finish hardening with moisture in the mouth over the hours after the visit. That is why dentists usually advise not eating or chewing on the treated side for a while. Follow the instructions given at your appointment.

My temporary filling fell out. What now?

+

Avoid chewing on that side, keep the area clean and see your dentist without waiting for the return date, especially if the tooth is in root canal treatment. Do not try to seal the tooth with wax, gum, glue or home products.

Where can I replace a temporary filling with a permanent one in Mooca?

+

In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients at Rua Hipódromo, 1141, near Bresser-Mooca station, Monday to Sunday, from 8 a.m. to 10 p.m., including holidays. Appointments via WhatsApp (11) 97409-7834, in Portuguese, English or Spanish.

Read next
Book WhatsApp