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.

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