Comparative sealing ability of temporary filling materials evaluated by leakage of radiosodium.

Summary. The sealing ability of four temporary filling materials was evaluated in vitro, by studying leakage of radiosodium from the pulp chambers of teeth into an external medium. Zinc oxide-eugenol based materials (IRM, ZOE) sealed better than calcium-sulphate based materials (Cavidentin, Cavit-G). Statistically significant differences were established between the sealing ability of the two types of materials during most of the experimental period, but no differences were established between the sealing ability of the two materials of the same type.

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