Background For esthetic consideration, dentin color post core materials were normally used for all-ceramiccrown restorations. However, in some cases, clinicians have to consider combining a full ceramic crown with ametal post core. Therefore, this experiment was conducted to test the esthetical possibility of applying cast metalpost core in a full ceramic crown restoration. Methods The color of full ceramic crowns on gold and Nickel-Chrome post cores was compared with the colorof the same crowns on tooth colored post cores. Different try-in pastes were used to imitate the influence of acomposite cementation on the color of different restorative combinations. The majority of patients could notdetect any color difference less than △E 1.8 between the two ceramic samples. So, △E 1.8 was taken as theobjective evaluative criterion for the evaluation of color matching and patients’ satisfaction. Results When the Empress 2 crown was combined with the gold alloy post core, the color of the resultingmaterial was similar to that of a glass fiber reinforced resin post core (△E = 0.3). The gold alloy post core andthe try-in paste did not show a perceptible color change in the full ceramic crowns, which indicated that the colorof the crowns might not be susceptible to change between lab and clinic as well as during the process ofcomposite cementation. Without an opaque covering the Ni-Cr post core would cause an unacceptable coloreffect on the crown (△E = 2.0), but with opaque covering, the color effect became more clinically satisfactory(△E = 1.8). Conclusions It may be possible to apply a gold alloy post core in the Empress 2 full ceramic crown restorationwhen necessary. If a non-extractible Ni-Cr post core exists in the root canal, it might be possible to restore thetooth with an Empress 2 crown after covering the labial surface of the core with one layer of opaque resincement. Background For esthetic consideration, dentin color post core materials were normally used for all-ceramiccrown restorations. However, in some cases, clinicians have to consider combining a full ceramic crown with ametal post core. Therefore, this experiment was conducted to test the esthetical possibility of Apply cast metalpost core in a full ceramic crown restoration. Methods The color of full ceramic crowns on gold and Nickel-Chrome post cores was compared with the color of the same crowns on tooth colored post cores. Different try-in pastes were used to imitate the influence of acomposite cementation on the color of different restorative combinations. The majority of patients could not detect any color difference less than ΔE 1.8 between the two ceramic samples. So, ΔE 1.8 was taken as the objective evaluative criterion for the evaluation of color matching Results When the Empress 2 crown was combined with the gold alloy post core, the color of th e resultingmaterial was similar to that of a glass fiber reinforced resin post core (ΔE = 0.3). The gold alloy post core and the try-in paste did not show a perceptible color change in the full ceramic crowns, which indicates that the color of the crowns might not be susceptible to change between lab and clinic as well as during the process of composite cementation. Without an opaque covering the un-plated postcore would an unacceptable coloreffect on the crown (ΔE = 2.0), but with opaque covering, the color effect became more clinically satisfactory (ΔE = 1.8). Conclusions It may be possible to apply a gold alloy post core in the Empress 2 full ceramic crown restoration solution. If a non-extractible Ni-Cr post core exists in the root canal, it might be possible to restore the tooth with an Empress 2 crown after covering the labial surface of the core with one layer of opaque resincement.