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KMID : 0362419950330040645
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Journal of Korean Academy of Prosthodontics
1995 Volume.33 No. 4 p.645 ~ p.661
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Effect of gold electrodeposit of PD-AG, NI-Cr alloys on the color of venerred resin
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Yang Hong-So
Park Young-Jun
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Abstract
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As the mechanical property of composite resin improved, composite resin has been widely used in esthetic dentistry. In the field of esthetic dentistry, the color of prosthetic material is very important. The purpose of this study was to evaluate the color difference of specimens, by the types of alloys and gold electrodeposit. @ES Experimental groups were as follows: @EN Group Prec : Au-Pt alloy with no gold coating and no resin veneer. Group Semi :L Pd-Ag alloy with no gold coating and no resin veneer. Group Base: Ni-Cr alloy with no gold coating and no resin veneer. Group Gsem : Pd-Ag alloy with gold coating and no resin veneer. Group Gbas : Ni-Cr alloy gold coating and no resin veneer. Group PreR : Resin veneer on the Au-Pt alloy without gold coating. Group GsemR : Resin veneer on the Pd-Ag alloy with gold coating. Group Semr : Resin veneer on the Pd-Ag alloy without gold coating. Group GbasR : Resin veneer on the Ni-Cr alloy with gold coating. Group BasR : Resin veneer on the Ni-Cr alloy without gold coating. In this study, colors of metal surfaces and veneered resins were evaluated by the CIE L*a*b* system. @ES The results obtained were as follows: @EN 1. Different alloy types and gold coating make tha L*a*b* value significantly different. 2. The △E*ab value between groups Semi and Base was less than 1.5 and there was no a* and b* value difference between groups Gsem and Gbas 3. The values of L* and a* in groups GsemR and GbasR were so similar that the △E*ab value was as small as 0.58. 4. In resin specimens with gold coated semiprecious or base alloys showed yellower and redder deviation than the resin specimens with precious alloy. 5. The △E*ab values between goups PreR-GsemR and groups PreR-GbasR were as small as 2.68 and 2.22 respectively.
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