TREATMENT OF ECTOPICALLY ERUPTED MAXILLARY FIRST PERMANENT MOLARS

Yun, Hyo-jin; Park, Ho-won; Lee, Ju-hyun; Seo, Hyun-woo

Journal of the Korean Academy of Pediatric Dentistry 2010;37(4):519-525.
Published online November 30, 2010.

TREATMENT OF ECTOPICALLY ERUPTED MAXILLARY FIRST PERMANENT MOLARS

Hyo-jin Yun, Ho-won Park, Ju-hyun Lee, Hyun-woo Seo

Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University

이소맹출 한 상악 제1대구치의 맹출 유도

윤효진, 박호원, 이주현, 서현우

강릉원주대학교 치과대학 소아치과학교실 및 구강과학연구소

Correspondence: Ho-won Park, Tel: 033-640-3158, Email: pedo@gwnu.ac.kr

Received: 30 August 2010 • Accepted: 25 October 2010

Abstract

Ectopic eruption means the eruption of the tooth in an abnormal position due to multiple factors, which found most frequently in maxillary fist permanent molars, mandibular lateral incisors and maxillary permanent canines. Ectopic eruption of the maxillary first permanent molar occurs when the molar erupts with a more mesial angulation than normal, and locks itself in an atypical resorption on the distobuccal root of the second primary molar. The maxillary first permanent molar plays important roles for mastication and occlusion, so ectopically erupted maxillary first permanent molars should be relocated into proper position. Treatment options are separation by insertion of the brass wire or elastic rings, preparation of distal aspect of the maxillary second primary molar, using fixed or removable appliance with finger spring, and placement of space maintainer or space regainer after extraction of the maxillary second primary molar. We report three cases treated of ectopically erupted maxillary first permanent molar by re-setting of stainless steel crowns, placement of brass wire and using active plate. We could find out distal movement of maxillary first permanent molars into proper position and normal occlusion.

Key Words: Ectopic eruption, Maxillary first permanent molar, Re-setting of stainless steel crown, Brass wire, Active plate