【摘要】 目的 研究不同瓷厚度、桩核和粘接剂对前牙单层高透氧化锆冠修复体颜色性能的影响，为前牙全瓷冠修复提供临床指导方案。方法 在纯钛桩核、金钯桩核和一体化玻璃纤维桩核上制作厚度为0.6 mm、1.0 mm、1.5 mm的单层高透氧化锆冠，分别用透明树脂、A2色树脂和玻璃离子粘接剂进行粘固。VITA Easyshade分光光度仪对每个冠唇侧中部的颜色进行测定，采用L*a*b*系统记录色度值，并计算比较各种不同因素对冠修复体色差的影响。结果 (1)瓷厚度对修复体颜色的影响：随着瓷厚度的增加色差值（ΔE）呈减小的趋势，且差异有统计学意义（P<0.001）。(2)桩核对冠修复体颜色影响的大小依次为：纯钛桩>金钯合金桩>一体化玻璃纤维桩，色差值（ΔE）差异有统计学意义（P<0.001）。(3)粘接剂对修复体颜色的影响：纯钛桩核组仅在瓷厚度为1.5 mm、使用玻璃离子粘接剂时，色差值在临床可接受阈值内（ΔE<3.7）；金钯合金桩核受粘接剂的影响不显著；纤维桩核组在瓷厚度0.6 mm时，玻璃离子组色差值高于临床可接受阈值（ΔE>3.7），另外两组的色差值在临床可接受阈值内（ΔE<3.7），差异有统计学意义（P<0.001），在瓷厚度1.0mm时，玻璃离子组色差值高于肉眼可接受阈值（ΔE>1.5），另两组在肉眼可接受阈值内（ΔE<1.5）。结论 全瓷冠修复体的最终色彩效果受到瓷厚度、桩核和粘接剂种类等因素的影响，在临床工作中应对这些因素进行综合考虑，选择合适的修复方案。更多还原

【Abstract】 Objective To investigate the effects of different porcelain thicknesses, post and core materials, and e of monolithic high-translucency zirconia crowns for anterior teeth, and to provide clinical adhesives on the color performance of monolithic high-translucency zirconia crowns for anterior teeth, and to provide clinical guidance for anterior all ceramic crown restorations.Methods Single-layer high-transparency zirconia crowns with thicknesses of 0.6mm, 1.0mm and 1.5mm were fabricated on pure titanium post cores, gold-palladium post cores and one-piece glass fiber post cores respectively, and were cemented with transparent resin, A2 resin and glass ionomer cement. The color of the middle part of the labial surface of each crown was measured using a VITA Easyshade spectrophotometer. The color values were recorded using the L*a*b* system,and the effects of various factors on the color difference of the crown restorations were calculated and compared.Results (1)The effect of porcelain thickness on the color of the restoration: As the porcelain thickness increases, the color difference value(ΔE) shows a decreasing trend, and the difference is statistically significant(P<0.001).(2)The effect of the post core on the color of the restoration: Pure titanium post > Gold-palladium alloy post > Integrated glass fiber post,with statistically significant differences in the color difference value(ΔE)(P<0.001).(3)Effect of cement type on restoration color:In the titanium post group, ΔE values fell within the clinically acceptable threshold(ΔE<3.7) only when using glass ionomer cement at 1.5mm ceramic thickness. The gold-palladium alloy post group showed no significant cement-induced color variations. For fiber posts at 0.6 mm thickness, the glass ionomer subgroup exceeded the clinical acceptability threshold(ΔE>3.7), while the other two cement groups remained within limits(ΔE<3.7), with statistically significant differences(P<0.001). When the porcelain thickness is 1.0 mm, the color difference value of the glass ionomer group is higher difference value of the glass ionomer group is higher than the visually acceptable threshold(ΔE>1.5), while the other two groups are within the visually acceptable threshold(ΔE<1.5).Conclusion The final color effect of all-ceramic crown restorations is influenced by factors such as post and core color,porcelain thickness, and adhesive type. In clinical practice, these factors should be comprehensively considered to select an appropriate restoration plan.更多还原