Reliability of Metalloceramic and Zirconia-based Ceramic Crowns
Reliability of Metalloceramic and Zirconia-based Ceramic Crowns
复制标题
金属陶瓷和氧化锆基陶瓷牙冠的可靠性
DOI：
10.1177/0022034510375826
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发表时间：
2010
影响因子：
7.6
通讯作者：
Paulo G. Coelho
中科院分区：
文献类型：
--
作者：
N. R. Silva;E. Bonfante;R. Zavanelli;V. P. Thompson;J. Ferencz;Paulo G. Coelho
尽管全瓷冠系统的使用越来越多，但其相对于金属陶瓷冠（MCR）的机械性能尚未确定。本研究验证了MCR在口腔运动疲劳条件下比两种Y-TZP全瓷冠系统具有更高可靠性的假设。使用具有下颌第一磨牙的平均尺寸的基于CAD的牙体预备件作为主模来制造所有的牙体预备件。一个0.5 mm Pd-Ag和两个Y-TZP系统核用1.5 mm瓷贴面。将牙冠粘结到模具的老化（在水中60天）复合材料（Z100，3 M/ESPE）复制品上。进行口腔运动疲劳，并确定使用水平概率威布尔曲线。所有系统的失效模式包括从压痕部位开始的瓷贴面碎裂或断裂。疲劳是全陶瓷系统的加速因素，但不是MCR系统的加速因素。后者提出了显着更高的可靠性下的嘴运动循环力学测试。
Despite the increasing utilization of all-ceramic crown systems, their mechanical performance relative to that of metal ceramic restorations (MCR) has yet to be determined. This investigation tested the hypothesis that MCR present higher reliability over two Y-TZP all-ceramic crown systems under mouth-motion fatigue conditions. A CAD-based tooth preparation with the average dimensions of a mandibular first molar was used as a master die to fabricate all restorations. One 0.5-mm Pd-Ag and two Y-TZP system cores were veneered with 1.5 mm porcelain. Crowns were cemented onto aged (60 days in water) composite (Z100, 3M/ESPE) reproductions of the die. Mouth-motion fatigue was performed, and use level probability Weibull curves were determined. Failure modes of all systems included chipping or fracture of the porcelain veneer initiating at the indentation site. Fatigue was an acceleration factor for all-ceramic systems, but not for the MCR system. The latter presented significantly higher reliability under mouth-motion cyclic mechanical testing.
DOI：
10.1002/jbm.b.30852
发表时间：
2008-01-01
影响因子：
3.4
作者：
Huang, Min;Thompson, V. P.;Soboyejo, W. O.
通讯作者：
Soboyejo, W. O.
影响因子：
7.6
作者：
KELLY, JR;TESK, JA;SORENSEN, JA
通讯作者：
SORENSEN, JA