首頁  >   演講資訊  >   電子貼示報告E-Poster  >   摘要  >  
Main Instructor Hsin-Yi Lo
Liang-Ru Chen
Kwong-Wa Li
Ming-Lun Hong
Department / Institution Division of Orthodontics, Veterans General Hospital,Taichung
Classification Case report
 The maxillary incisors have an great influence on facial esthetic. Although the prevalence rate of the labial inversely impacted maxillary central incisor is rarely low (0.02% to 0.06%).Treatment of an impacted maxillary central incisor is challenge to the orthodontist ,because of its unique position within the esthetic zone, which requiring careful management of the soft tissue issues and the dilaceration root .
In this case ,we treated an 8-year-old girl with an labial inversely impacted right central incisor by closed-eruption technique at the beginning .After the tooth arrived at the muco-gingival junction ,we changed the method into open-eruption technique because it was difficult to rotate the incisor upside down with closed-eruption method. From the posttreatment radiograph examination ,the root dilaceration was noted and the root apex was touchable from the labial side. The pulp vitality need a long-term follow up or root canal treatment and apicoectomy be indicated.
After debonding, she was still in her late mixed dentition stage, so we gave her a fixed lingual type retainer. But ,due to the deep bite, the retainer failure after 3 days. And we found a rotational relapse in this case ,which was rarely seen in other study. Therefore, orthodontic retreatment and fixed-type retainer is needed for longterm stability.

Treatment of Labial Inversely Impacted Central Incisor and The Stability Outcome : A Case Repor