ERUPTION GUIDANCE OF IMPACTED SECOND PREMOLAR TOOTH BY EXTRACTION OF PROLONGED RETAINED SECOND PRIMARY MOLAR.

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Journal of the Korean Academy of Pediatric Dentistry 2003;30(3):495-501.
Published online August 31, 2003.

ERUPTION GUIDANCE OF IMPACTED SECOND PREMOLAR TOOTH BY EXTRACTION OF PROLONGED RETAINED SECOND PRIMARY MOLAR.

만기 잔존된 제 2 유구치 발거에 의한 제 2 소구치의 자발적 맹출 유도

이근혜, 남동우, 김현정, 김영진, 남순현

경북대학교 치과대학 소아치과학교실

Abstract

Impaction is defined as the cessation of the eruption of the tooth caused by a clinically or radiographically detectable physical barrier in the eruption path or by the ectopic position of tooth germ. Besides the third molars and the maxillary canines, the most common impacted tooth is the second premolar. The overall frequency of premolar impaction has been reported to be 0.5%. In some cases, orthodontic traction and surgical repositioning may be indicated. When impacted second premolar is involved with prolonged retained second primary molar, extraction of primary molar and space maintenance lead to eruption of second premolar. In these cases, all patients visited to department of pediatric dentistry of Kyungpook National University Hospital for the chief complaint of unerupted second premolar. Extraction of prolonged retained second primary molar and space management are tried for spontaneous eruption of impacted second premolar tooth. The results were as follows: 1. When impacted second premolar is involved with prolonged retained second primary molar, minimal treatment via elimination of primary molar leads to successful results. 2. Proper space management and periodic radiographic examination are required before eruption of second premolar. 3. Sufficient time must be allowed for confirm of tooth movement before orthodontic traction or surgical repositioning. 4. The result is more successful in incomplete root development.

Key Words: Extraction of primary molar; Second premolar; Impaction; Spontaneous eruption