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首页> 外文期刊>Dental Materials Journal >Improving shear bond strength between feldspathic porcelain and zirconia substructure with lithium disilicate glass-ceramic liner
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Improving shear bond strength between feldspathic porcelain and zirconia substructure with lithium disilicate glass-ceramic liner

机译：用二硅酸锂玻璃陶瓷衬里改善长石瓷与氧化锆亚结构之间的剪切结合强度

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摘要

This study investigated the shear bond strength (SBS) between veneering porcelain and zirconia substructure using lithium disilicate glass-ceramic as a liner. The mineral phases and microstructures of lithium disilicate glass-ceramic at temperature range of 800–900°C were preliminarily investigated. SBSs of porcelain-veneered zirconia specimens with and without lithium disilicate glassceramic liner fired at the same temperature were determined. Results showed that SBSs of veneering porcelain and zirconia with lithium disilicate glass-ceramic liner was notably increased (p <0.05). Specimens from the group with the highest SBS (59.7 MPa) were subject to thermocycling up to 10,000 cycles and their post-thermocycling SBSs investigated. Though weakened by thermocycling, SBSs were above the clinically acceptable limit (25 MPa) of ISO 9693. Fractographic analysis revealed mixed cohesive and adhesive failures. It was concluded that lithium disilicate glass-ceramic is a potential liner which generated high SBS between veneering porcelain and zirconia.
机译：本研究以二硅酸锂玻璃-陶瓷为衬里，研究了饰面瓷和氧化锆亚结构之间的剪切粘结强度（SBS）。初步研究了硅酸锂玻璃陶瓷在800–900°C温度范围内的矿物相和微观结构。测定了在相同温度下烧成和未烧成二硅酸锂玻璃陶瓷衬里的瓷质氧化锆样品的SBS。结果表明，带有二硅酸锂玻璃陶瓷衬里的饰面瓷和氧化锆的SBS显着增加（p ＜0.05）。 SBS最高的组（59.7 MPa）中的样品进行了高达10,000个循环的热循环，并研究了热循环后的SBS。尽管受热循环作用减弱，但SBS仍高于ISO 9693的临床可接受极限（25 MPa）。分形分析表明，内聚和胶粘剂混合失效。结论是，二硅酸锂玻璃陶瓷是一种潜在的衬里，可在饰面瓷和氧化锆之间产生高SBS。

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