Adhesive luting of all-ceramic restorations--the impact of cementation variables and short-term water storage on the strength of a feldspathic dental ceramic.
Adhesive luting of all-ceramic restorations--the impact of cementation variables and short-term water storage on the strength of a feldspathic dental ceramic.
复制标题
全瓷修复体的粘合——胶结变量和短期水储存对长石牙科陶瓷强度的影响。
DOI：
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复制
发表时间：
2008
影响因子：
3.3
通讯作者：
G. Fleming
中科院分区：
文献类型：
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作者：
O. Addison;P. Marquis;G. Fleming
目的
研究树脂水泥粘合变量和短期储水对粘合全瓷修复材料强度的影响。了解强化机制将导致操作技术和材料选择标准的优化。
材料和方法
480 个圆盘状长石瓷样本的“贴合”表面经过氧化铝空气研磨，以引入临床相关的表面纹理和一致的表面缺陷群。将 30 个样本随机分配到 16 组，每组涂有硅烷、未填充树脂或填充树脂水泥或它们的组合。在双轴弯曲测试（球环）之前，将八组干燥或潮湿储存 24 小时。在威布尔分析之前，弯曲强度数据的统计分析涉及三因素一般线性模型（p < 0.05）。
结果
在瓷器表面涂覆树脂会导致特征应力 (sigma(o)) 显着增加，并且强化程度取决于涂层类型 (p < 0.001)。在填充树脂水泥涂层之前，硅烷底漆会产生额外的强度。水浸泡 24 小时会导致未涂层对照和涂层样品的强度下降，其中强度下降的幅度取决于涂层类型 (p < 0.001)。
结论
牙科陶瓷的树脂粘合导致显着强化，可能影响临床表现。强化取决于对骨水泥变量和临床放置技术敏感的树脂陶瓷混合层的创建。短期水浸会导致对树脂陶瓷混合层特性敏感的强化显着降低。
PURPOSE
To investigate the impact of resin cement luting variables and short-term water storage on the strength of an adhesively luted all-ceramic restorative material. An understanding of the strengthening mechanisms will result in optimisation of operative techniques and materials selection criteria.
MATERIALS AND METHODS
The "fit" surfaces of 480 disk-shaped feldspathic porcelain specimens were alumina air abraded to introduce a clinically relevant surface texture and consistent surface defect population. Thirty specimens randomly allocated to each of 16 groups were coated with silane, unfilled resin or filled resin cement, or a combination. Eight groups were stored either dry or wet for 24 h prior to bi-axial flexure testing (ball-on-ring). Statistical analysis of the flexure strength data involved a three-factor general linear model (p < 0.05) prior to a Weibull analysis.
RESULTS
Resin coating the porcelain surface resulted in a significant increase in the characteristic stress (sigma(o)), and strengthening was dependent on coating type (p < 0.001). Silane priming resulted in additional strengthening when preceding filled resin cement coating. Water immersion for 24 h resulted in a strength degradation of both the uncoated control and coated specimens, whereby the magnitude of strength degradation was dependent on coating type (p < 0.001).
CONCLUSION
Resin luting of dental ceramics results in significant strengthening likely to impact on clinical performance. The strengthening is dependent on the creation of a resin-ceramic hybrid layer sensitive to cementation variables and clinical placement technique. Short-term water immersion results in a significant degradation of strengthening sensitive to the characteristics of the resin-ceramic hybrid layer.