Minimization of the marginal deterioration of ceramic inlays with fractographic examination.

我们进行了定量和形态的调查，分析和阐明了陶瓷嵌体边缘的变化，并确定了这些变化的机制。功能性牙尖区的边缘崩解明显大于非功能性牙尖区(Wilcoxon Sign-ranks检验，p&lt；0.05)。定量测量和断口分析表明，边缘劣化依次呈现三个阶段：第一阶段树脂复合水泥磨损量迅速增加，第二阶段磨损量无明显变化，第三阶段陶瓷和/或牙釉质微裂纹快速发展。第一阶段和第二阶段之间的界限出现在6个月和21个月期间，第二阶段和第三阶段之间的界限出现在72个月。结论：陶瓷嵌体的纵向边缘劣化是一个连续的三阶段模式，我们建立了边缘…的体外加速试验更多的陶瓷嵌体退化再现活体退化，并探讨粘固剂厚度对边缘退化的影响。共1600次循环磨损载荷的体外加速试验，从定量和形态上成功地再现了体内三个序列的边缘退化。在水泥宽度为100μm的标本中观察到边缘恶化明显较少(ANOVA和Scheffe‘s F检验，p&lt；0.05)。建议水泥宽度应小于100μm，以最大限度地减少陶瓷嵌体的边缘劣化。对于水平间隙，探头尖端直径与Alfa/Bravo边界显著相关，而对于垂直台阶，相关不显著。结果表明，辅助和不使用放大镜的目视检查对模拟边际差异的评估没有显著影响。这些发现突显了传统牙科探测者在评估修复体边缘差异方面的重要性--在没有更具歧视性的设备的情况下。较少

We investigated quantitatively and morphologically analyzed and clarified the marginal changes of ceramic inlays and determined the mechanism for those changes. Marginal disintegration at the functional cusp area was significantly greater than at the non-functional cusp area (Wilcoxon signed-ranks test, p<0.05). Quantitative measurement and fractographic examination identified a sequential three-stage pattern of marginal deterioration ; initial rapid progress of wear of resin composite cement in the first stage, followed by a second stage without any remarkable visible change, then rapid progression of microfractures of ceramics and/or enamel in the third stage. Boundaries between the first and second stage were found in the six and 21-month period, and those between the second and third stage at 72 months. It was concluded that longitudinal marginal deterioration of ceramic inlays progressed in a sequential three-stage pattern.We established an in vitro acceleration test of the margin … More al deterioration of ceramic inlays reproducing in vivo deterioration and to investigate the influence of the cement thickness on the marginal deterioration. It was confirmed that the in vitro acceleration test, which was a total of 1,600 cyclic wear loadings, successfully reproduced the in vivo three-sequential marginal deterioration quantitatively and morphologically. Significantly less marginal deterioration was observed in a specimen with the cement width of 100 μm (ANOVA and Scheffe's F test, p<0.05). It was suggested that cement width should be less than 100 μm to minimize the marginal deterioration of ceramic inlays.A significant correlation was found to exist between explorer tip diameter and the Alfa/Bravo boundary for horizontal gaps, but not for vertical steps. It was suggested that visual inspection aided and unaided with loupes had no significant effect on the evaluation of simulated marginal discrepancies. The findings highlight the importance of the traditional dental explorer - in the absence of a more discriminatory device, in the assessment of marginal discrepancies in restorations. Less