Abstract
The present report described clinical management of 32 cases of impacted teeth which were tracted and aligned in the dental arch at the Department of Pediatric Dentistry, Fukuoka Dental College.
As a result of treating these cases, the following findings were obtained.
1. The subjects comprised of 27 children (male: 10, female: 17). There were 3 cases of primary teeth and 29 cases of permanent teeth.
2. Causes of impaction: One case due to a supernumerary tooth, five cases due to odontoma, and four cases due to follicular cysts, twenty-two cases for unknown cause (nineteen of twenty-two cases were caused by abnormal direction of tooth eruption, and the others showed normal direction).
3. The most frequently tracted teeth in all the cases were the upper central incisors, and the second most frequent were the upper canines.
4. Crown axis (axle): The tipping angles of the upper central incisors were 46°-126° to the long axis of the normal upper permanent central incisor
.5. Age at beginning of treatment: An average of 8 years 6 months for the upper central incisors, and an average of 10 years 10 months for the upper canines.
6. Condition of root formation at beginning of treatment: Two cases were complete, whereas thirty cases were incomplete.
7. Term of active tooth guidance: The average term, for the upper central incisors was 14 months and the average for the upper canines was 17 months.
8. All cases showed favorable prognosis.
