【摘要】 背景:高金合金基底烤瓷冠的色泽、颈缘染色、边缘密合度明显优于其他合金基底烤瓷冠,然而许多因素均会影响修复体的颜色,其中制作工艺对全瓷冠修复体的美学效果影响较大。目的:观察体层回切后烧结对前牙金合金烤瓷冠切端颜色的影响。方法:采用DeguDent金瓷系统制作2M2色金瓷冠试件样本,实验组试件使用体层回切后烧结,再堆筑釉质瓷烧结的制作工艺;对照组试件体层回切后直接堆筑釉质瓷烧结。以比色片为对照试件,测量两组金瓷冠与比色片之间的明度、色度和饱和度值,计算色差分析其颜色变化。结果与结论:实验组明度最高,与比色片相比差异无显著性意义(P>0.05);实验组色度显著高于对照组和比色片(P<0.05);饱和度比色片最高,但与其他组相比,差异无显著性意义(P>0.05);实验组与比色片之间的色差△E=0.39<1.5、对照组与比色片之间的色差△E=3.08>1.5。实验组与对照组之间的色差△E=3.88。提示采用体层回切后烧结的制作工艺可以更好的呈现前牙金合金烤瓷冠切端的颜色,能更加逼真的模拟天然牙的自然色调。更多还原

【Abstract】 BACKGROUND:The color,neck edge staining and the edge microleakage of high gold alloy-porcelain crowns is better than that of other alloy-porcelain crowns.However,many factors can influence the color of the restoration,and the manufacture has a greater impact on the aesthetic effect of all-ceramic crown restorations. OBJECTIVE:To study the effect of sintering process following body cut-back on the color of anterior gold alloy-porcelain crown’s incisal ridge. METHODS:Gold alloy-porcelain crowns samples of 2M2 shade were fabricated by the DeguDent porcelain system.After body cut-back,samples of experimental group were sintered first then spread with enamel layer and sintered again,while the control group were directly spread with enamel layer and sintered.Compared with the 2M2 shade guide,the L*,a*,b* values were measured and color difference(△E) of two groups were obtained.The color changes were analyzed as well. RESULTS AND CONCLUSION:The L* value of experimental group was the highest,and there were no significant difference to compare with shade guide(P > 0.05);The a* value of experimental group was higher than that of control group and shade guide obviously(P < 0.05);The b* value of shade guide was the highest and there were no significant difference to compare with other two groups(P > 0.05).The color difference between experimental group and shade guide was △E=0.39<1.5 and the color difference between control group and shade guide was △E=3.08>1.5,and the color difference between experimental group and control group was △E=3.88.The fabrication process of sintering following body cut-back can present better color of anterior gold alloy-porcelain crown’s incisal ridge.The color is much more similar to natural teeth.更多还原