The purpose of this study was to evaluate the staining property of dental composite resins in various solutions.
Eleven kinds of dental composite resins were used in this study, five of them were chemically cured composite resins and the others were visible light cured composite resins. Specimens (diameter 20mm, thickness 1.3mm) were immersed in 2% of coffee solution, cola, distilled water, orange juice, soy sauce solution and tea solution for 1, 2, 3 and 4 weeks. The value of Hunters color difference dE)was measured by Spectrophotometer (MS- 2000, Macbeth, U.S. A) with integrating sphere.
From the experiment following results were obtained :
1. Staining tendencies of composite resins were higher in coffee, tea and soy sauce solution.
2. Composite resins were stained much after one week and thereafter the degree of staining was not much increased as in the first week.
3. Chemically cured composites showed higher tenency of staining than visible light cured composites.
4. Blended composites showed the highest value of staining, followed in order by convetional and microfilled composites.
5. Posterior composites showed higher value of staining than anterior and anterior/posterior composites and this was significant.
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