To assess clinical effect of replantation in avulsed immature permanent teeth.

30 avulsed permanent teeth with immature apex treated following the International Association of Dental Traumatology treatment guidelines from July 2008 to June 2009 were analyzed in the retrospective study. The healing outcomes were classified into 4 categories: normal periodontal ligament healing, surface resorption, ankylosis and inflammatory resorption.

The rate of normal periodontal ligament healing, surface resorption, ankylosis and inflammatory resorption were 23.3%, 3.3%, 43.3%, and 30.0% respectively.

Traumatic injuries that result in ankylosis and inflammatory resorption of the permanent teeth in growing child leave the practitioners with many considerations to make the most appropriate treatment plan.