Study Finds Knocked Out Baby Teeth Can Affect Permanent Teeth

Children who suffer the trauma of having a baby tooth knocked out may also see damage to the tooth's permanent replacement, according to Danish researchers.

Researchers studied the dental records of 4,238 children who were patients at one of three dental clinics in Copenhagen to determine the frequency of such dental emergencies with primary teeth and location of knocked out teeth.

Only 35 children in the group reported knocked out teeth and a total of 44 teeth were recorded. The most frequently knocked out tooth was an upper front tooth.

Researchers also studied the permanent teeth replacing them and found that 30 percent of replacement permanent teeth showed developmental problems like discoloration and enamel deficiencies. Children who suffered a knocked out tooth at a younger age had a higher risk of having a damaged permanent tooth.

For advice on how to deal with a knocked out tooth, log on to the American Dental Association Web site at or contact your dentist.

© 2017 American Dental Association. All rights reserved. Reproduction or republication is strictly prohibited without the prior written permission from the American Dental Association.

This article is intended to promote understanding of and knowledge about general oral health topics. It is not intended to be a substitute for professional advice, diagnosis or treatment. Always seek the advice of your dentist or other qualified healthcare provider with any questions you may have regarding a medical condition or treatment.

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  • Dental visit
    New parents often ask, "When should my child first see a dentist?” Your child should see a dentist by his or her first birthday.

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