| Budget Amount *help |
¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1993: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1992: ¥3,800,000 (Direct Cost: ¥3,800,000)
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| Research Abstract |
The Mercox-Rhodamin Method for marginal microleakage test is a kind of dye penetration method. The specimens were immersed in the mixture of Mercox which is a low viscosity resin and used for vascular architecture, and Rhodamin B which is a fluoresent dye, by applying a pressure of 5 Kg/cm^2 using a compressed air for 15 minutes. When microleakage is tested by using a dye penetration, the specimens must be sectionded, only the leakage in the sectioned plane can be observed and this leakage is not the sequence one. On the other hand, in the Mercox-Rhodamin method, When the specimens are immersed in the 10% Nitric acid, Enamel and Dentin disolve. It allows direct observation of the entire area of the penetrated Mercpx-Rhodamin resin.
Other advantages of using the Mercox-Rhodamin Method are as follows :
1. The examination of microleakage using this method tends to evaluate the higher degree of microleakage than that using the dye method.
2. This method was an effective microleakage test which demonstrates clear differences in microleakage of composite resin restorations.
3. In this leakage test, the area and passway of microleakage is directly observed. The leakage can be evaluated by TV immage processor (TVIP4100II), making statistical analysis easier.
4. This leakage test is a superior test method to directly find the comprex passway of leakage in 3D.
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