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KMID : 0362320080330030198
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Journal of Korean Academy of Operative Dentistry
2008 Volume.33 No. 3 p.198 ~ p.203
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Microleakage of Endodontic Temporary Restorative Materials under Dynamic Loading
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Jung Dong-Ho
Noh Young-Shin
Lee Hae-Doo
Chang Hoon-Sang
Ryu Hyun-Wook
Min Kyung-San
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Abstract
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The purpose of this study was to compare the sealing abilities of four endodontic temporary restorative materials using a methylene blue dye penetration test under dynamic loading. Standardized access cavities were prepared in forty-four intact human permanent molar teeth, and the cavities were restored with Caviton, MD-Temp, IRM, or ZOE. After thermocycling, an intermittent load of 98 N at 1 Hz was applied for 1,000 cycles to the long axis of the functional cusp of each of the teeth, which were immersed in a 1% methylene blue solution. The teeth were split in half, and the linear depth of dye penetration was evaluated according to the criteria. The results were analyzed using one-way ANOVA (p = 0.05) and Duncan’s multiple range test. The results demonstrated that Caviton and MD-Temp showed significantly lower microleakage than IRM and ZOE. It was concluded that Caviton and MD-Temp exhibited better sealing ability than IRM and ZOE under dynamic loading.
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KEYWORD
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Microleakage, Temporary restorative material, Dynamic loading
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