Something just came out of your tooth. Maybe you felt it while eating, maybe you found it on your tongue, or maybe you bit down and something felt off and now there is a gap where a filling used to be. You are probably running your tongue over it right now. In many cases, a dentist can restore a decayed tooth with a filling before the exposed area becomes more sensitive or damaged.
The first thing worth knowing is that you almost certainly did not swallow anything harmful. Small restorations that get accidentally ingested pass through without issue. The more pressing concern is the tooth itself, which is now sitting open without the protection it had an hour ago.
Pasadena Dental Office and Orthodontics gets calls about this regularly, and the question is almost always the same: do I need to come in today, or can this wait? The honest answer is that it depends on what the tooth is doing, and we'll get to that. But first, a little context on why fillings come out in the first place, because it's almost never random.
Why Fillings Fall Out
Dental restorations wear out. Composite resin fillings, the tooth-colored kind used in most offices now, typically hold up somewhere between 7 and 10 years before the margins start to break down. Research published in the Journal of Dental Research puts the median survival of posterior composites at around 7 to 8 years, with new decay forming at the edges of old restorations being the most common reason they fail.
What usually happens is gradual. The seal between the filling material and the tooth structure slowly degrades. Sometimes new decay starts underneath. The filling gets a little loose, a little undermined, and then one day you bite into something and it's just gone. Arkady Tsibel DDS puts it plainly: "When a filling falls out, it rarely happens randomly. There's usually been marginal breakdown going on for a while. The filling coming out is often the symptom, not the problem."
Old amalgam restorations can last longer but fail the same way eventually. And fillings on back teeth take more force, more thermal stress, more daily wear than any other restoration in the mouth. They don't last forever.
What To Do Right Now
Rinse gently with warm water. That clears out debris and lets you get a sense of how large the cavity is. Don't probe it with your finger or a toothpick. Don't try to push anything back in with whatever you have around the house. Superglue is not a dental material and it will complicate the repair significantly.
Stop eating on that side. The dentin underneath your old filling has tiny tubules running toward the nerve, and without the filling covering them, temperature and pressure go straight through. Cold things in particular will be sharp and immediate. It's not dangerous, but it's unpleasant enough that most people figure out pretty quickly to eat on the other side.
If you've got the old filling and it's in one piece, rinse it and set it aside, but don't expect to have it recemented. Fillings that fall out usually can't be reused. The dentist will clean the cavity, check for decay, and place new material.
Call the office as soon as it opens. Most dental offices keep time available for situations like this and can often get you in within a day or two for something straightforward.
Using Pharmacy Dental Cement
If you need to get through a day or two before your appointment, over-the-counter dental cement is worth picking up. Products like Dentemp or Temparin are available at most drugstores. They create a temporary seal over the cavity that reduces sensitivity and keeps bacteria from sitting in the open space while you wait.
Press the material gently into the cavity following the package instructions. Don't chew on it. It won't hold up to normal biting force and isn't meant to. It's just a short-term cover, not a fix. Clove oil on a small cotton ball also helps with sensitivity if the nerve is reacting strongly. It contains eugenol, which is the same compound used in many professional dental cements, and it has a genuine short-term numbing effect.
When It Actually Becomes Urgent
Most lost fillings are a schedule-within-a-few-days situation. A couple of scenarios push that timeline up.
If the tooth starts aching on its own, without any trigger, no temperature, no pressure, just a dull or throbbing pain that's just there, that's pulpal involvement. That changes the likely treatment from a new filling to root canal therapy, and it shouldn't sit for a week.
If there's a sharp edge cutting into your tongue or cheek, that needs to be smoothed sooner rather than later. It won't stop on its own and the soft tissue damage accumulates fast.
Visible dark discoloration inside the cavity usually means active decay that progressed after the original filling was placed. That needs to be cleaned out before anything new goes in, and the sooner that happens the less tooth structure gets lost.
Spontaneous pain is the real red flag. Sensitivity that only shows up with cold or chewing is annoying but stable. Pain that's just there on its own means something deeper is happening.
Getting Seen
If you're in Pasadena or nearby and a filling just came out, call Pasadena Dental Office and Orthodontics at (626) 219-7180. We'll ask a few questions, figure out how urgent it is, and get you in accordingly. A filling handle promptly stays a simple fix. Given a few more weeks of an open cavity collecting bacteria, it usually doesn't.
Emergency Dentist in Pasadena When You Need It Most
