What Should You Do If You Lose A Filling?.

If you lose a filling, keep the area clean, avoid chewing on that side, and schedule a dental visit soon. Temporary filling material from a pharmacy can cover the space briefly when used as directed, but the tooth still needs evaluation for decay, cracks, bite stress, or a replacement restoration. MedlinePlus covers dental problems and treatment in its dental health information, and a lost filling is a good example of why restored teeth need follow-up.

How A Filling Fails

Fillings can loosen because the surrounding tooth chipped, decay undermined the edge, grinding flexed the restoration, or normal wear broke the bond. Once the filling is gone, the opening can trap food and bacteria. The exposed tooth may feel sensitive to cold, sweets, air, or pressure. Even without pain, the tooth is less protected than it was before the restoration came out.

Short-term protection buys time, not certainty.

What To Avoid

• Do not pack aspirin, cotton, or household glue into the hole.
• Do not chew hard or sticky foods on that side.
• Do not ignore new sensitivity or bite pain.
• Do not assume the old filling can simply be replaced without an exam.

At the visit, the dentist checks how much tooth remains, whether decay is active, whether the nerve is irritated, and whether the bite contributed to failure. A small lost filling may need a new filling. A larger defect may need an onlay or crown. If the tooth cracked or the nerve is involved, root canal treatment or extraction may enter the conversation.

Sensitivity gives useful clues. A quick zing with cold may mean exposed dentin, while lingering heat pain or spontaneous throbbing can point toward nerve inflammation. Pain on biting can suggest a crack or high spot. Tell the office which pattern fits instead of saying only that it hurts. That detail helps them decide whether the first visit is likely to be a straightforward restoration or a deeper diagnostic appointment. It also helps them reserve enough time if numbing, decay removal, or a temporary build-up may be needed that day and same-week follow-up if possible locally.

Similar Emergencies, Different Fixes

A crown that falls off exposes more prepared tooth structure; read What Should You Do If A Crown Falls Off?. If the tooth broke with the filling, see What Should You Do For A Broken Tooth?. If aching or swelling develops, How Do You Stop A Toothache Until The Dentist? can help you manage the wait. Use find a dentist if you need an appointment and tell the office whether the tooth is painful or merely open.

How To Think About It

A lost filling is usually not a hospital emergency, but it is not harmless. Keep it clean, protect it briefly if appropriate, and schedule repair before sensitivity, decay, or fracture expands the problem.