Objective To measure the spectral transmittance of Cerinate porcelain veneer and enamel in different color and different thickness. Methods Samples of Cerinate porcelain veneers were prepared in different thickness（0.50 mm、0.75 mm、1.00 mm） and different Vita shade（A1、A2、A3）. Enamel samples in shade A2 were made with three thickness（0.50 mm、0.75 mm、1.00 mm）. A spectrophotometer with spectra range（380-800 nm） was employed to measure the spectral transmittance. Results Spectral transmittance decreased with the increasing in the thickness of specimens and decreasing in the color darkness. The transmittance of Cerinate porcelain veneer material and enamel in the same color and same thickness hadn′t significant difference. Conclusion The key factor to spectral transmittance of porcelain veneer materials is veneer′s thickness, and the color of the materials has also some influence on it. Cerinate porcelain veneers can properly recover the transparency of teeth.
