MULTIPLE ANKYLOSIS ON MAXILLARY AND MANDIBULAR PRIMARY MOLARS WITHOUT PERMANENT SUCCESSOR

Jung, Hwi-Hoon; Choi, Hyung-Jun; Kim, Seong-Oh; Choi, Byung-Jai; Lee, Jae-Ho

Journal of the Korean Academy of Pediatric Dentistry 2005;32(3):403-408.
Published online August 31, 2005.

MULTIPLE ANKYLOSIS ON MAXILLARY AND MANDIBULAR PRIMARY MOLARS WITHOUT PERMANENT SUCCESSOR

Hwi-Hoon Jung, Hyung-Jun Choi, Seong-Oh Kim, Byung-Jai Choi, Jae-Ho Lee

Department of Pediatric Dentistry, College of Dentistry and Oral Science research Center, Yonsei University

계승치의 결손을 동반한 상, 하악 유구치의 다발성 유착에 대한 증례보고

정회훈, 최형준, 김성오, 최병재, 이제호

연세대학교 치과대학 소아치과학교실∙구강과학연구소

Correspondence: Jae-Ho Lee, Tel: 02-2228-3173, Email: leejh@yumc.yonsei.ac.kr

Abstract

Ankylosis is defined as a fusion of cementum or dentine with alveolar bone. Due to the loss of the periodontal ligament on the ankylotic area, the tooth is incapable of continued eruption and hence is unable to follow the normal vertical development of the neighboring teeth and alveolar process. A 6-year-old female was referred to the Dept. of Pediatric Dentistry for ankylosis of primary molars and congenital missing of permanent premolars on both jaws. She had neither specific past medical history nor trauma and infection history in oral and maxillofacial region. Radiographic finding is that the maxillary primary molars were the early onset of ankylosis and had fast root resorption rate. However the mandibular primary molars were ankylosed later and being resorbed slower than maxillary primary molars. The object of treating this case is to maintain the proper alveolar bone growth and retention of deciduous molars. The point of managing this case is as follows: Proper treatment (observation, restoration, or extraction) should be established after thorough consideration of the time of onset, the root resorption rate, progression of infraocclusion and the development of alveolar bone support. We should consider the timing of extraction of the ankylosed teeth without problem of neighbouring alveolar bone growth and tilting of adjacent teeth in the view of growth spurt. Early diagnosis is important to avoid many of the complications with infraoccluded primary molars.

Key Words: Tooth ankylosis, Alveolar bone growth, Growth spurt, Extraction