Load-bearing capacity of lithium disilicate and ultra-translucent zirconias.
Load-bearing capacity of lithium disilicate and ultra-translucent zirconias.
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DOI：
10.1016/j.jmbbm.2018.08.023
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发表时间：
2018-12
影响因子：
3.9
通讯作者：
Zhang Y
中科院分区：
文献类型：
--
作者：
Yan J;Kaizer MR;Zhang Y
本研究的目的是评价整体二硅酸锂(LIDI-IPS e.max CAD)和不同组成的新型超半透明氧化锆修复体的承载能力：5Y-PSZ(5mol%Yttria部分稳定的氧化锆)和4Y-PSZ(4mol%Yttria部分稳定的氧化锆)，并与3Y-TZP(3mol%Ytria稳定的氧化锆)对照。实验采用每种陶瓷材料10个圆盘试件(直径12×1 mm)。对加工后的氧化锆凹版表面进行喷砂处理(50µm Al_2O_3，2bar)，同时对LiDi进行5%HF酸蚀20次S。然后，使用Multilink Automix粘固剂和Monobond Plus Primer将陶瓷圆盘粘接在牙本质基板(G10，一种高压玻璃纤维材料)上，形成陶瓷/水泥/牙本质基板三层结构。粘接试件在37°C的水中保存3天，然后进行赫兹压痕弯曲径向断裂试验。根据陶瓷凹陷(粘结)表面的弯曲拉应力--这是导致陶瓷嵌体整体断裂的原因--采用板-地基理论来验证三层体系的承载能力。实验数据表明，在牙本质样基质的支持下，LiDi的承载能力(872N)优于5Y-PSZ的承载能力(715N)，甚至可以达到4Y-PSZ的承载能力(864N)，而3Y-TZP的承载能力(1195N)仍然是最高的。理论分析与实验观测结果一致。5Y-PSZ的透光率接近LIDI，优于4Y-PSZ和3Y-TZP。当粘结到牙本质上并由牙本质支撑时，二硅酸锂表现出与4Y-PSZ相似的承载性能，但比5Y-PSZ好得多。
The aim of this study was to evaluate the load-bearing capacity of monolithic lithium disilicate (LiDi - IPS e.max CAD) and novel ultra-translucent zirconia restorative systems of various compositions: 5Y-PSZ (5 mol% yttria-partially-stabilized zirconia) and 4Y-PSZ (4 mol% yttria-partially-stabilized zirconia); relative to a 3Y-TZP (3 mol% yttria-stabilized zirconia) control. Experiments were carried out with 10 disc specimens (Ø12 × 1 mm) per ceramic material. The zirconia intaglio surface (as machined) was sandblasted (50 µm Al2O3 at 2 Bar), while LiDi was etched with 5% HF for 20 s. The ceramic discs were then adhesively bonded onto a dentin-like substrate (G10, a high-pressure fiberglass material) using Multilink Automix cement and Monobond Plus primer, producing a ceramic/cement/dentin-like substrate trilayer structure. The bonded specimens were stored in water for 3 days at 37°C prior to a Hertzian indentation flexural radial fracture test. The plate-on-foundation theory was used to validate the load-bearing capacity of the trilayer systems based on the flexural tensile stress at the ceramic intaglio (cementation) surface—a cause for bulk fracture of ceramic onlays. The experiment data showed that, when bonded to and supported by a dentin-like substrate, the load-bearing capacity of LiDi (872 N) is superior to the 5Y-PSZ (715 N) and can even reach that of 4Y-PSZ (864 N), while 3Y-TZP still holds the highest load-bearing capacity (1195 N). Theoretical analyses agree with experimental observations. The translucency of 5Y-PSZ approaches that of LiDi, which are superior to both 4Y-PSZ and 3Y-TZP. When adhesively bonded to and supported by dentin, lithium disilicate exhibits similar load-bearing properties to 4Y-PSZ but much better than 5Y-PSZ.
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影响因子：
4.4
作者：
Nogueira, Audrea Dallazem;Della Bona, Alvaro
通讯作者：
Della Bona, Alvaro
DOI：
10.1016/j.dental.2013.04.004
发表时间：
2013-07
期刊：
Dental materials : official publication of the Academy of Dental Materials
影响因子：
--
作者：
Ma L;Guess PC;Zhang Y
通讯作者：
Zhang Y
影响因子：
2.7
作者：
Kim, JH;Miranda, P;Lawn, BR
通讯作者：
Lawn, BR
影响因子：
9.4
作者：
Miranda, P;Pajares, A;Lawn, BR
通讯作者：
Lawn, BR
影响因子：
2.7
作者：
Rudas, M;Qasim, T;Lawn, BR
通讯作者：
Lawn, BR