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《Journal of Clinical Stomatology》 2005-10
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4 kinds of metal bases' effects to the color of samples of resin fused to metal

DANG Yong-gang,GUO Tian-wen,ZHANG Hui,TONG Yu,WANG Bin.Department of prosthetics College of Stomatology,Fourth Military Medical University,Xi'an 710032,China  
Objective:To compare the color difference of different metal bases and different dentin resin thicknesses,associate it with the clinic value evaluation of resin fused to titanium restoration.Method:Titanium,gold alloy,captek and Ni-Cr plates were prepared,and then divided them into 6 subgroups with 0.5 mm,0.7 mm,0.9 mm,1.1 mm,1.3 mm,1.5 mm thickness.Minolta chromatics meter CR321 was used to examine the color properties of these samples,and ΔE was calculated to evaluate the difference of the specimens.Result:As the thickness of dentin resin increased,the chromatic value ΔE of the samples with same metal bases decreased accordingly.While after the detin resin thickness reached 1.1 mm or above,the chromatic value ΔE did not improve any longer(P0.05).For different metals,there is no significant difference between groups of titanium and gold alloy,gold captek.But there is difference between gold content metal and NiCr alloys.Conclusion:To obtain ideal color appearance in clinics,dentin resin thickness should be more than 1.1 mm.With the increasing of resin thickness,the hue of the restoration changes from red to green,but the lightness of restoration decreased for varying metal bases.
【Fund】: 国家自然科学基金资助课题(30171022)
【CateGory Index】: R783
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