Reliability and mode of failure of bondedmonolithic monolithic and multilayer ceramics
Reliability and mode of failure of bondedmonolithic monolithic and multilayer ceramics
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DOI：
10.1016/j.dental.2016.11.014
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发表时间：
2017-02-01
期刊：
影响因子：
5
通讯作者：
Della Bona, Alvaro
中科院分区：
文献类型：
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作者：
Alessandretti, Rodrigo;Borba, Marcia;Della Bona, Alvaro
Objective.评估CAD-on技术（Ivoclar）中使用的单片和多层陶瓷结构的可靠性，以及陶瓷结构与牙本质模拟材料（NEMA-G10）结合时产生的失效模式。陶瓷试样如下制造（n=30）：CAD-三层结构（IPS e.max ZirCAD/IPS e. max Crystall./ Connect/IPS e. max CAD）; YLD-双层结构（IPSe. max ZirCAD/IPS e. max Ceram）; LDC-monolithic structure（IPS e. max CAD）;和YZW单片结构（Zenostar Zr Translator）。将所有陶瓷试样粘结到G10上，并在37 ℃蒸馏水中经受压缩载荷，直到发出第一次裂纹的声音，声学监测。记录失效载荷（L-f）值（N），并采用Weibull分布、Kruskal-Wallis检验和Student-Newman-Keuls检验（α =0.05）进行统计学分析。CAD-on和YZW结构的L-f值在统计学上相似（p=0.917），但高于YLD和LDC（p < 0.01）。所有实验组的Weibull模量（m）值在统计学上相似。整体结构（LDC和YZW）因径向裂纹而失效。CAD-on和YLD组的失效主要表现为径向和锥形裂纹。整体氧化锆（YZW）和CAD上的结构表现出类似的耐失效性和可靠性，但不同的断裂行为。(C)2016年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objective. To evaluate the reliability of monolithic and multilayer ceramic structures used in the CAD-on technique (Ivoclar), and the mode of failure produced in ceramic structures bonded to a dentin analog material (NEMA-G10).Methods. Ceramic specimens were fabricated as follows (n=30): CAD-on-trilayer structure (IPS e.max ZirCAD/IPS e. max Crystall./Connect/IPS e. max CAD); YLD-bilayer structure (IPSe. max ZirCAD/IPS e. max Ceram); LDC-monolithic structure (IPS e. max CAD); and YZW monolithic structure (Zenostar Zr Translucent). All ceramic specimens were bonded to G10 and subjected to compressive load in 37 degrees C distilled water until the sound of the first crack, monitored acoustically. Failure load (L-f) values were recorded (N) and statistically analyzedusing Weibull distribution, Kruskal-Wallis test, and Student-Newman-Keuls test (alpha=0.05).Results. L-f values of CAD-on and YZW structures were statistically similar (p=0.917), but higher than YLD and LDC (p < 0.01). Weibull modulus (m) values were statistically similar for all experimental groups. Monolithic structures (LDC and YZW) failed from radial cracks. Failures in the CAD-on and YLD groups showed, predominantly, both radial and cone cracks.Significance. Monolithic zirconia (YZW) and CAD-on structures showed similar failure resistance and reliability, but a different fracture behavior. (C) 2016 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.