DECORONATION ON ANKYLOSED PERMANENT INCISOR AFTER DENTAL TRAUMA

Kang, Yu-Jin; Kim, Young-Jin; Kim, Hyun-Jung; Nam, Soon-Hyeun

Journal of the Korean Academy of Pediatric Dentistry 2010;37(2):252-259.
Published online May 31, 2010.

DECORONATION ON ANKYLOSED PERMANENT INCISOR AFTER DENTAL TRAUMA

Yu-Jin Kang, Young-Jin Kim, Hyun-Jung Kim, Soon-Hyeun Nam

Department of Pediatric Dentistry, School of Dentistry, Kyungbook National University

외상으로 유착된 영구 전치에서의 치관 절제술

강유진, 김영진, 김현정, 남순현

경북대학교 치의학전문대학원 소아치과학교실

Correspondence: Soon-Hyeun Nam, Tel: 053-600-7201, Email: dent-ksy@hanmail.net

Received: 1 December 2009 • Accepted: 2 March 2010

Abstract

Trauma commonly leads to ankylosis for the tooth whose periodontal ligaments have been injured. In growing patients, an ankylosed tooth can disrupt alveolar development, resulting in infraocclusion of the affected tooth. Consequently, this causes aesthetic problems during adolescence, interferes with prosthetic treatment due to the inclination of adjacent teeth, and complicates orthodontic dental movement. When the infraoccluded ankylosed tooth is extracted, a considerable amount of alveolar bone is lost, especially in the maxillary anterior region. Moreover, depression of the thin buccal alveolar bone compromises aesthetic restoration. In order to prevent alveolar bone loss, the ankylosed tooth should be treated by decoronation. In the present study, the traumatically injured maxillary incisors of 9-year-old and 10-year-old patients that present infraocclusion accompanied by ankylosis were treated with decoronation procedures. Decoronation procedures were performed when the affected teeth were 2-3 mm below relatively to the adjacent teeth. Moreover, the patients were treated before they get to 16 years old considering the maximum growth peak of the korean adolescents. As the results, there are favorable clinical results associated not only with preservation of horizontal alveolar volume but also with increase in vertical alveolar height after decoronation in growing individuals.

Key Words: Ankylosis, Submerged tooth, Decoronation, Permanent incisor