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J Korean Acad Pediatr Dent. 2010;37(2): 260-266.
Ji-Young Kim, Young-Jin Kim, Hyun-Jung Kim, Soon-Hyeun Nam
Department of Pediatric Dentistry, School of Dentistry, Kyungbook National University
Corresponding Author: Soon-Hyeun Nam ,Tel: 053-600-7201, Email: ent-ksy@hanmail.net
Received: December 1, 2009;  Accepted: March 2, 2010.
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Trauma to the primary teeth may have an effect on the successive permanent teeth. Thus, the treatment plans should be focused on safety of their permanent teeth. The degree of developmental disturbances in those permanent teeth depends upon many factors including the age of the children, developmental conditions of the affected teeth, types and severities of trauma and time interval from the moment of trauma to the initial treatment the patients received. The complications of the effected permanent teeth vary from the mild enamel hypoplasia to the premature finishing of teeth development. In this study, children whose ages were 33 months, 5 years, and 26 months presented the developmental disturbances to their permanent teeth, which resulted from the trauma to the primary teeth: the intrusion, the avulsion, and the subluxation. There showed a mild complication in the case of subluxation resulting in enamel hypoplasia, but, the more severe complication of the root dilacerations occurred in the case of intrusion. Furthermore, the 5-year-old patient whose primary dentition was near in transition period to the permanent one, the more complicated problem such as stop of root development of the permanent teeth was resulted from the avulsion. Thus, one should assume that the types of trauma and the age of the children at the moment of trauma have different effects on those successive permanent teeth. In conclusion, when the trauma that causes changes in the position of primary teeth happened, it is important to arrange an appropriate treatment procedure considering the types of trauma and the developmental conditions of the permanent teeth.
Keywords: Primary teeth | Trauma | Successive permanent teeth | Developmental disturbances
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