May also be called: Broken Tooth; Knocked-Out Tooth A secondary tooth injury is an injury or damage to a secondary or permanent tooth. Permanent teeth are also called "adult" teeth. More to Know Permanent teeth are the teeth that come in after kids lose their primary or "baby" teeth. Kids usually begin to lose their baby teeth when they're about 6 years old, then the permanent teeth come in over the next 15 years, as the jaw grows. Tooth injuries are common, especially from falls or playing sports. An injured permanent tooth might come out, be loose, or be broken, and always needs treatment as soon as possible. Keep in Mind Permanent teeth that come out usually can be replaced successfully. A dentist can repair chipped or broken teeth by using either the broken parts from the tooth or a material that looks like the tooth (called composite resin). All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts. Back to Articles Related Articles First Aid: Teeth Injuries If your child loses a baby tooth, there's no need to replace it. But if a permanent tooth is dislodged, it's a dental emergency. Here's what to do. Read More Going to the Dentist What happens when you go to the dentist? Find out in this article for kids. Read More Taking Care of Your Teeth The healthier your teeth are, the happier you look. That's why it's important to take great care of your teeth by brushing, flossing, and visiting the dentist. Learn more. Read More Mouth and Teeth Did you know that your mouth is the first step in the body's digestive process? Or that the mouth and teeth are essential for speech? Learn about the many roles your mouth and teeth play. Read More Your Teeth There's much more to a tooth than meets the eye. This article for kids gives you the inside story. Read More Taking Care of Your Teeth There's a lot more to taking care of your teeth than breath mints and mouth sprays. Read this article to learn the facts on flossing, how to give plaque the brush-off, and much more. Read More Mouth and Teeth Our mouth and teeth play an important role in our daily lives. Here's a course on the basics - including common problems of the mouth and teeth. Read More Keeping Your Child's Teeth Healthy Here are the basics about how to care for your child's teeth - and when. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.