The Purpose` of this study was to evaluate the possibility of using Vita Lurrin shade guide to select shades of composite resin. Vita Lumin shade guide, such as four kinds of composite resin Z100(3M), Prisma T.P.H. (Caulk/Dentsply), Tetric(Vivadent), Dentacolor resin system(Kulzer Co.) and shade guide which is supplied by the manufacturer were used in this study. The four kinds of shade which are popular were used; A2, A3, 133, and D2.
4 but, in case of Prisma T.P.H., we chose A3.5 instead of A3 because it does not have A3 shade. The shade guide from the manufacturer and Vita Lumin shade guide are ready made but we made 6 samples od each composite resin which size are 101mm in diameter, 2.00.1mm in thickness, and then composite resin were light cured for 40 sec. In case of the Dentacolor resin system, we put them into the Dentacolor XS unit then light cured 180 sec. according to manufacturer´s instruction. After the curing, we eliminated the samples from the molds and stored them in distilled water for 48 hours. Using the Colorimeter(Hunter Inc., USA) and examining the value of L*a*b* for three times, we calculated their mean values.
The resulte were as follows; among all 4 kinds of composite resin which are, produced by same shade, shade guide which are supplied b~ same shade vs. composite resin, there are big differences more than expected. In the view of the result of this study, there is a little problem -with the use of the Vita Lumin shade guide and the shade guide which is supplied b~, munufacturer. Therefore, we conclude that we need more accurate the cuatomized shade guide.
This study was supported by researph- funds-from Cho_sun university.
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