Abstract

This in vitro study aimed to investigate the bond strength and discoloration between the zirconia framework and veneer ceramic applied after liner and argon plasma treatment with two different techniques. A total of 200 zirconium substructures of 12 mm length, 10 mm width, and 0.7 mm thickness were divided into five subgroups for the application of different thicknesses of liner: C (no liner application), L1 (0.1 mm), L2 (0.2 mm), L3 (0.1 mm + 0.1 mm) and LA (0.1 mm + 0.1 mm + argon plasma). The zirconia substructures were fabricated by two different techniques (A: layering, B: press-on). The specimens of the three subgroups Control, Group L3, and Group LA were tested for color difference. Color parameters were measured using a spectrophotometer before and after thermal cycling, and differences (CIEDE 2000 [ΔE₀₀]) were calculated. The shear bond strength was applied to all subgroups using a universal testing machine. The data were analyzed statistically using the Shapiro–Wilk, Levene, and Kruskal–Wallis tests. The interface and fractured surfaces of the specimens were also evaluated by scanning electron microscopy (SEM). Significant differences were found between the groups (p < 0.05) in terms of shear bond strength and color differences (p < 0.001). Group LA showed significantly higher bond strength and color stability than the other groups (p < 0.001). The results of the study demonstrated that the application of liner and argon plasma between the upper and lower structures of all-ceramic systems significantly affects the bond strength and final colour of the restorations.

摘要

这项体外研究旨在研究在使用两种不同技术进行内衬和氩等离子体处理后应用的氧化锆框架和贴面陶瓷之间的粘合强度和变色。共200个长12毫米、宽10毫米、厚0.7毫米的锆亚结构分为五个亚组，用于不同厚度的衬里应用：C（无衬里应用）、L1（0.1毫米）、L2（0.2毫米） )、L3 (0.1 mm + 0.1 mm) 和 LA (0.1 mm + 0.1 mm + 氩等离子体)。氧化锆亚结构是通过两种不同的技术制造的（A：分层，B：压制）。测试三个亚组Control、组L3和组LA的样品的色差。在热循环前后使用分光光度计测量颜色参数，以及差异 (CIEDE 2000 [ΔE₀₀ ]) 计算。使用万能试验机将剪切粘合强度应用于所有亚组。使用 Shapiro-Wilk、Levene 和 Kruskal-Wallis 检验对数据进行统计分析。还通过扫描电子显微镜（SEM）评估了试样的界面和断裂表面。 在剪切粘合强度和颜色差异 ( p  < 0.001)方面，发现各组之间存在显着差异 ( p < 0.05 )。LA 组显示出显着高于其他组的粘合强度和颜色稳定性（p < 0.001)。研究结果表明，在全瓷系统上下结构之间应用衬里和氩等离子体显着影响修复体的粘合强度和最终颜色。