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首页> 外文期刊>Swedish dental journal. >Fracture strength of all-ceramic (Y-TZP) three- And four-unit fixed dental prostheses with different connector design and production history
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Fracture strength of all-ceramic (Y-TZP) three- And four-unit fixed dental prostheses with different connector design and production history

机译：具有不同连接器设计和生产历史的全陶瓷（Y-TZP）三和四单元固定义齿的断裂强度

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Aims; To investigate how different default settings for connector design of two different CAD/CAM systems, i.e.to compare how different radii of curvature in the embrasure area of the connector affect the fracture strength and the fracture mode of 3-unit and 4-unit all-ceramic FDPs made from Y-TZP and to investigate how the number of pontics affect the fracture strength of Y-TZP. Material and methods: 32 all-ceramicthree (3Z) and four (4Z) -unit, Y-TZP, FDP cores were made and divided in 4 groups, with 8 FDP in each group. The groups 3Z:1 and 4Z:1 were generated with a mechanical scanner, Procera? Forte and the FDPs in group 3Z:2 and 4Z:2 were generated with an optical scanner, NobelProcera? Scanner. The connector dimensions were set to 3 mm x 3 mm and core was set to 0.7 mm. The design of radius of the gingival and occlusal embrasures in the connector areas was set according to default settings and the manufacturer's recommendations. All the FDP cores were subjected to heat treatment, thermocycled for 5,000 cycles, preloaded for 10,000 cycles to simulate ageing and finally loaded to fracture. Results: Regarding connector design a significant difference was found between group 3Z:1 and 3Z:2 (P
机译：目的;为了研究两种不同的CAD / CAM系统的连接器设计的不同默认设置，即比较连接器包围区域中不同的曲率半径如何影响3单元和4单元全断裂强度和断裂模式， Y-TZP制成的陶瓷FDP，并研究桥体的数量如何影响Y-TZP的断裂强度。材料和方法：制作32个全陶瓷三（3Z）和四个（4Z）单元，Y-TZP，FDP芯，并分为4组，每组8个FDP。 3Z：1和4Z：1组是使用机械扫描仪Procera？生成的。用光学扫描仪NobelProcera？生成3Z：2和4Z：2组中的Forte和FDP。扫描器。连接器尺寸设置为3 mm x 3 mm，芯线设置为0.7 mm。根据默认设置和制造商的建议设置了连接器区域的牙龈和牙合cl裂的半径设计。所有的FDP磁芯都经过热处理，热循环5,000个循环，预加载10,000个循环以模拟老化并最终加载至断裂。结果：关于连接器设计，在3Z：1组和3Z：2组之间存在显着差异（P

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