Authors: Andreasen JO, Kristerson L.
Title: The effect of extra-alveolar root filling with calcium hydroxide on periodontal healing after replantation of permanent incisors in monkeys.
Journal: J Endod
Date: Aug 1981
Citation: 7(8):349-54
Category: Trauma
Evidence-based Ranking: 5
Purpose/Objectives: To evaluate the effect of filling canals of extracted teeth with CaOH prior to replantation.

Materials & Methods: All samples were obtained from green vervet monkeys. The teeth were luxated and removed, left avulsed for either 18 or 120 min., treated, and then replanted. The study was divided into the following groups. Group Pulp Treatment Avulsion Time Replacement Resorption % 1 Extirpation 18 1.5 2 Gutta Percha 18 5.7 3 CaOH 18 21.8 4 Extirpation 120 25.1 5 Gutta Percha 120 89.3 6 CaOH 120 87.5

Results: Significantly more replacement resorption was found in the CaOH treated group 3. This is most likely due to the affect of CaOH stimulating hard tissue formation.

AuthorÂ’s Conclusion: Based on this study treatment for avulsed teeth should be replacement followed by endodontic treatment after 2 weeks.

Validity of Conclusion: Valid

ReviewerÂ’s Comments: A good study that shows that stimulating hard tissue development may not always be a good thing.