Knocked-Out Tooth? What to Do in the First 30 Minutes

If an adult tooth gets knocked out, pick it up by the crown, rinse it briefly in milk or saline, and try to put it back in its socket. If you can’t, keep it in milk and get to a dentist as soon as possible, ideally within 30 to 60 minutes.

With a knocked-out (“avulsed”) tooth, the clock really matters. The root is covered in living cells that help it reattach to the bone, and they start to die within minutes once they dry out. Here is a calm, minute-by-minute plan.

The Bottom Line

Hold the tooth by the crown (the white chewing part). Never touch the root.
Rinse it for a few seconds in milk or saline if it’s dirty. Don’t scrub it.
Put it back in the socket if you can. If not, keep it in milk, saline, or a tooth-preservation kit.
Never store it in water or wrap it in a tissue, and don’t let it dry out.
Never put a baby tooth back in.
See a dentist as soon as possible, ideally within 30 to 60 minutes.

Minutes 0–5: Stay Calm and Find the Tooth

First, check the person, not the tooth. If there is a head injury, heavy bleeding, or trouble breathing, skip to the ER section below.

If the injury is only to the mouth, find the tooth and pick it up by the crown only. Touching the root can damage the cells that help it heal back in place.

If the tooth is dirty, rinse it briefly (a few seconds) in milk or saline. If you have neither, a quick rinse under cool water is OK, but don’t store it in water. Don’t scrub it, use soap, scrape it, or dry it with a towel. Leave any tissue fragments attached.

Minutes 5–15: Try to Put It Back (Adult Teeth Only)

The American Association of Endodontists (AAE) says the best place for a knocked-out permanent tooth is back in its socket. If the person is awake and able to cooperate:

Hold the tooth by the crown and make sure it faces the right way (the smooth front side faces out).
Gently push it back into the socket. Don’t force it.
Have them bite softly on clean gauze, a clean cloth, or a moist tea bag to hold it in place.

If it won’t go in easily, don’t force it. Store it instead.

If You Can’t Reinsert It: Keep It Moist

Keeping the root moist is the most important thing you can do. Good options:

A tooth-preservation kit from a pharmacy, if you have one. They’re worth keeping in a sports bag.
Cold milk. Easy to find and very effective for short periods.
Saline solution (contact lens saline works).
Inside the cheek, for adults only. An adult can hold the tooth between the cheek and gums. Never do this with a child, because they could swallow or choke on it.

Never store a tooth in plain water, which damages the root cells, and don’t wrap it in a tissue or carry it dry. A tooth that has been dry for more than an hour has a much poorer outlook, but still bring it to the dentist.

Minutes 15–30: Get to a Dentist

Call a dentist right away and say a tooth has been knocked out. The AAE recommends being seen within 30 minutes if possible.

To control bleeding on the way, press gently with gauze or a clean cloth. A cold compress on the outside of the cheek can help with swelling. See our guide to dental bleeding for more tips.

What About Baby Teeth?

Never put a knocked-out baby tooth back in. Reinserting it can damage the permanent tooth developing underneath. Instead, have your child bite gently on gauze to control bleeding and call your dentist. If you aren’t sure whether it’s a baby or adult tooth (it can be hard to tell between ages 6 and 12), keep it in milk and call for advice.

When to Go to the ER Instead

Some injuries need emergency medical care first. Call 911 or go to the nearest ER if there is:

A head injury, confusion, vomiting, or any loss of consciousness
Bleeding that won’t stop after 10–15 minutes of firm pressure
Trouble breathing or swallowing
A possible broken jaw: the teeth don’t fit together, the jaw looks out of line, or it hurts to open or close the mouth

Once the person is medically stable, follow up with a dentist about the tooth.

What the Dentist Will Do

At your visit, the dentist will usually:

Examine and X-ray the socket, nearby teeth, and bone
Clean and reposition the tooth, or check the position if you already put it back
Place a flexible splint that attaches the tooth to the teeth next to it, usually for about two weeks, while it reattaches
Check other injuries, such as cuts to the lips or gums, and discuss antibiotics or a tetanus booster if needed

For adult teeth with fully formed roots, a root canal is often needed in the following weeks, because the nerve rarely survives this kind of injury. Follow-up visits over the next months confirm it’s healing.

Even with fast, perfect care, not every knocked-out tooth can be saved long term. If it can’t, there are good replacement options, such as a dental implant or a bridge. For a deeper look at reinsertion and what happens when a tooth can’t be saved, read our step-by-step first aid guide for a knocked-out tooth.

Prevention: Mouthguards Matter

Many knocked-out teeth happen during sports, falls, and car accidents. To lower the risk:

Wear a mouthguard for contact sports, basketball, skateboarding, and martial arts. A custom-fitted guard from your dentist usually protects best.
Buckle up and use the right car seats for children.
Don’t use your teeth as tools to open packages or bottles.

Frequently Asked Questions

How long do I have to save a knocked-out tooth?
Results are best when the tooth is back in its socket within 30 to 60 minutes. Even after an hour, see a dentist.

Can I put the tooth in water?
Not for storage. Use milk, saline, a tooth-preservation kit, or (adults only) the inside of the cheek.

Should I put my child’s baby tooth back in?
No. Never reinsert a baby tooth, because it can harm the permanent tooth underneath. Control the bleeding and call your dentist.

Will my tooth definitely be saved?
No one can promise that. Fast action gives it the best chance, but some teeth still need later replacement.

Does a knocked-out tooth always need a root canal?
Often. Adult teeth with fully formed roots usually need one. Young teeth with developing roots may heal on their own, so your dentist will monitor them.

References

Knocked-Out Tooth? Call Us Right Away

If you or your child has a knocked-out or loose tooth, call Urgent Dental right away at (702) 228-1106. We offer same-day appointments when available, and we can talk you through what to do on the way. You can learn more about our knocked-out tooth care and emergency dental services, or request an appointment.

Urgent Dental
340 E Warm Springs Rd STE 100, Las Vegas, NV 89119
(702) 228-1106

This article is for general information and isn’t a substitute for professional dental or medical advice.