Objectives: The purpose of this study was to evaluate the sealing properties of a urethane dimethacrylate hydrophilic resin-based root canal filling material (EndoRez^TM; UDMA). UDMA was compared with AH-Plus and zinc-oxide-eugenol (ZOE). Methods: Sealers with or without gutta-percha cones or thermoplasticized injectable gutta-percha (Obtura^TM system) were used: The crowns of intact single-rooted teeth were removed and the root canals were prepared. The roots were divided into 7 experimental groups (n=10), a positive and a negative control group (n=5). The root canals were filled with AH-Plus with or without gutta-percha cone, thermoplasticized gutta-percha with or without AH-Plus, UDMA with or without gutta-percha cone, and gutta-percha cone with ZOE. The apices of the roots were removed and the specimens were incubated at 37^o ± 2^o C and 100% humidity. Each specimen was attached to a fluid filtration apparatus and the sealing properties of the root canal sealers/filling materials were measured at 7, 30 and 180 days. The data were analyzed using ANOVA and Tukey's post hoc tests (p<0.05). Results: The positive control group showed immeasurable and rapid fluid filtration while the negative group demonstrated no movement of the air bubble in the system. At any interval, thermoplasticized gutta-percha permitted the greatest amount of fluid leakage (2.03E^-05 ± 7.80E^-06), followed by ZOE (4.46E^-06 ± 3.06E^-06). There was no statistically significant difference between UDMA with gutta-percha (1.76E^-06 ± 9.24E^-07), AH-Plus without gutta-percha (1.07E^-06 ± 9.15E^-07 ), AH-Plus with gutta-percha (1.32E^-06 ± 4.25E^-07 ), or thermoplasticized gutta-percha with AH-Plus (1.96E^-06 ± 1.05E^-06). UDMA without gutta-percha (5.84E^-07 ± 4.62E^-07) showed the least fluid leakage. Conclusions: The results suggest that UDMA sealing properties are similar to AH-Plus, while the UDMA root canal sealer/filler exhibits superior sealing properties in comparison to ZOE or when using thermoplasticized gutta-percha with no sealer. (This study was supported by Ultradent Products Inc.)

Back to the Dental Materials: VIII - Others-Non-metallic Program
Back to the 81st General Session of the International Association for Dental Research (June 25-28, 2003)

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