CORRECTION OF ECTOPIC ERUPTION WITH BILATERAL ANCHORAGE : REPORT OF CASES

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Journal of the Korean Academy of Pediatric Dentistry 1999;26(2):446-452.
Published online May 31, 1999.

CORRECTION OF ECTOPIC ERUPTION WITH BILATERAL ANCHORAGE : REPORT OF CASES

양측성 고정원을 이용한 이소 맹출의 치료에 대한 증례 보고

안성인, 선예경, 심연수

삼성의료원 치과진료부 소아치과

Abstract

Ectopic eruption of the first permanent molar means the first permanent molar assumes an atypical path of eruption resulting in premature atypical resorption of the second primary molar. If the reversible eruption does not occur, early loss of the second primary molars results in space loss, mesial tipping of the first permanent molar, impaction of the second premolar, buccal segment crowding and overeruption of opposing tooth. The main objectives of treatment are (1) to prevent loss of the second deciduous molars so it can continue to serve as a space maintainer and (2) to regain lost arch length, allowing the second premolar to erupt into normal position. The optimal treatment approach depends on a number of factors including the clinical eruption status of /6/, the change in position of /6/, the amount of enamel ledge of /E/ entrapping /6/, the mobility of /E/, and the presence of pain or infection. Unilateral appliance to correct the mesial angulation of ectopic permanent first molars, as in the majority of the appliance designs, would produce a resultant force that would further enhance the space loss. A bilateral support similar to the holding arch design is recommended to maximize the anchorage. These case reports present the successful result of preserving space for the second premolar in treatment of ectopic eruption of the first permanent molar using Halterman appliance with bilateral anchorage on patients visiting department of pediatric dentistry in Samsung Medical Center.

Key Words: bilateral anchorage, ectopic eruption, Halterman appliance, maxillary first permanent molar