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  • Title: The effectiveness of different thickness of mineral trioxide aggregate on coronal leakage in endodontically treated deciduous teeth.
    Author: Olmez A, Tuna D, Ozdoğan YT, Ulker AE.
    Journal: J Dent Child (Chic); 2008; 75(3):260-3. PubMed ID: 19040811.
    Abstract:
    PURPOSE: The purpose of this study was to evaluate coronal dye leakage of mineral trioxide aggregate (MTA) when placed in different thicknesses over endodontically treated deciduous teeth. METHODS: Fourty-four extracted primary molar teeth were prepared for root canal treatment, and the canals were obturated with a paste including iodoform and calcium hydroxide. The teeth were randomly divided into 4 experimental groups, one for each material used for the coronal seal. Primary molar teeth were sealed with different thicknesses (1, 2, 3, 4 mm) of mineral trioxide aggregate (N=11) for each group. After a clearing procedure, data were statistically analyzed using the Kruskal-Wallis test, with differences of P<.05 considered to be significant. RESULTS: All positive control teeth showed dye penetration and all negative control groups showed no leakage. Statistically significant differences between the means of each group are identified. Group 1 (1 mm MTA) had a significantly greater percentage of dye penetration than the other groups (P<.05). Group 4 (4 mm MTA) had the lowest mean leakage (4%); it did not differ significantly from group 3 (3 mm MTA; P>.05). CONCLUSIONS: The 4-mm thick mineral trioxide aggregate had the lowest dye penetration, and there was no significant difference between this group and the 3 mm group. The 1-mm thick MTA showed the greatest percentage of dye penetration among the groups. The depth increase of MTA placed as a barrier following root canal treatment of deciduous teeth reduced the coronal leakage.
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