The infinity optical thickness gradual decreased in the same shade mark from1to4, and from A to D the results was not simple.
同一颜色系列标号从小到大，无限光学厚度依次减低； 从A至D标号，并非简单的依次减低，而是存在交叉现象。
Conclusion Although composite resins with the same color mark had the similar fillers, they had different color and infinity optical thickness.
结论相同色号的光敏树脂虽填料颗粒相同，但无限光学厚度存在差异，临床应用时最好预备多种树脂以备选色。
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