Idiopathic odontoma formation following avulsion of immature permanent incisors: two case reports.

From the findings of Case 1 and those cases reviewed in the literature it would appear that overfilling a canal with gutta percha prevents continued root formation after reimplantation of the tooth. The canal should be underfilled, therefore, if gutta percha is used as the obturating medium. Consequently, the authors recommend that calcium hydroxide be used as the root canal filling material of choice after reimplanting immature permanent teeth subsequent to traumatic avulsion. Since, however, calcium hydroxide paste tends to be resorbed, periodic refilling of the canal with the paste is required. Case 2 emphasizes the importance of periodic postoperative radiographic evaluation for several years after traumatic avulsion of immature permanent teeth.