Fractographic analysis of a dental zirconia framework: a case study on design issues.
Fractographic analysis of a dental zirconia framework: a case study on design issues.
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DOI：
10.1016/j.jmbbm.2010.07.004
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发表时间：
2010-11
影响因子：
3.9
通讯作者：
Scherrer SS
中科院分区：
文献类型：
--
作者：
Lohbauer U;Amberger G;Quinn GD;Scherrer SS
临床牙陶瓷失效的断口学分析可以为临床牙陶瓷失效的原因和机制提供新的认识。一个前路6单元全陶瓷氧化锆固定局部义齿（Cercon®）已临床恢复并使用定性断口摄影检查。目的是确定裂缝的起源，并说明失败的原因。对回收的氧化锆FPD进行了显微检查，以确定经典的断口模式，如停滞线、棘刺、扭转棘刺和尾迹棘刺。将裂纹扩展的方向映射并解释回核心的咬合腭尖与贴面陶瓷的界面处的破坏起源。不合适的岩心滴设计有利于局部应力集中，再加上岩心尖端界面贴面陶瓷中的孔隙团簇，是导致岩心厚度过早穿过的原因。
Fractographic analysis of clinically failed dental ceramics can provide insights as to the failure origin and related mechanisms. One anterior 6-unit all-ceramic zirconia fixed partial denture (FPD) (Cercon®) has been clinically recovered and examined using qualitative fractography. The purpose was to identify the fracture origin and to state the reasons for failure. The recovered parts of the zirconia FPD were microscopically examined to identify classic fractographic patterns such as arrest lines, hackle, twist hackle and wake hackle. The direction of crack propagation was mapped and interpreted back to the origin of failure at the interface of the occlusalpalatal tip of the core and the veneering ceramic. An inappropriate core drop design favoring localized stress concentration combined with a pore cluster in the veneering ceramic at the core tip interface were the reasons for this premature through-the-core thickness failure.
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影响因子：
4.6
作者：
Ernst, CP;Doz, P;Willershausen, B
通讯作者：
Willershausen, B
影响因子：
5
作者：
MECHOLSKY, JJ
通讯作者：
MECHOLSKY, JJ
影响因子：
5
作者：
Quinn, JB;Quinn, GD;Scherrer, SS
通讯作者：
Scherrer, SS
影响因子：
5
作者：
Kosmac, T;Oblak, C;Marion, L
通讯作者：
Marion, L
影响因子：
14
作者：
Studart, A. R.;Filser, F.;Gauckler, L. J.
通讯作者：
Gauckler, L. J.