Journal of the Korean Academy of Pediatric Dentistry 2008;35(2):339-344.
Published online May 31, 2008.
IATROGENIC IMPACTION OF LOWER LEFT PERMANENT CANINE : CASE REPORT
Song-Yi Kim, Sung Chul Choi, Yeong Chul Choi, Jae-Hong Park
Department of Pediatric Dentistry and *Institute of Oral Biology, School of Dentistry, Kyung Hee University 
Correspondence:  Sung Chul Choi,  Tel: 02-958-9371, Email: pedochoi@hotmail.com
Abstract
When a delayed eruption of tooth is diagnosed, the causative factor should be detected before an establishment of treatment plan, if possible. Although a panoramic radiograph is enough to evaluate the position of tooth and the stage of tooth development, a 3-D Dental CT would be a powerful tool to reveal a spatial relationships between objects. The reported case showed a delayed eruption of lower left permanent canine and a mini-plate with screws adjacent to the impacted canine. Although the screws adjacent to the root of impacted tooth showed a close proximity, it was not presumed that these screws would interfere the eruption of the tooth. The impacted canine did not show any spontaneous eruption during observation. After the mini-plate and screws were removed, an orthodontic traction using elastic power chain was performed. The position of mini-plates and screws should be carefully designed to avoid damaging the tooth follicles or tooth roots in the jaw. Also the screws should be removed before an orthodontic traction to prevent damaging the root surface of impacted tooth.
Key Words: Impaction, Iatrogenic, Lower permanent canine, Orthodontic traction, Early mixed dentition


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