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Metal ceramic fixed partial denture — fracture resistance

机译:金属陶瓷固定部分义齿 - 断裂抗性

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Metal ceramic Fixed Partial Dentures (FPD) are suitable to increase fracture resistance presenting higher clinical longevity. This type of prosthesis is mainly used when a great number of teeth replacements are needed. The FPD under analysis is defined by a metallic infrastructure (titanium) and by a ceramic coating. The advantages of hybrid FPD lie in their predictable biomechanical behaviour, versa-tility and cost. The main disadvantage is related to aesthetic functionality. Karlsson (1986), Lindquist & Karlsson (1998) and Palmqvist (1993) quantified the life time for hybrid FPD, referring 10 years in service to be a survival of break point. The connector design is of great importance to improve smooth stress pattern in the region between teeth. This region is also restrained by biological and aesthetic reasons. Ceramic material presents elevated failure rate in FPD due to brittleness. This work intends to predict fracture resistance to different loading conditions, using a smeared fracture approach (continuous dam- age mechanics). Results agree well with experimental evidence.
机译:金属陶瓷固定部分假牙(FPD)适合增加临床寿命较高的裂缝抗性。这种类型的假体主要用于当需要大量的牙齿时。在分析中的FPD由金属基础设施(钛)和陶瓷涂层限定。混合FPD的优势在于它们可预测的生物力学行为,versa-tility和成本。主要缺点与美学功能有关。 Karlsson(1986),Lindquist&Karlsson(1998)和Palmqvist(1993)量化了混合FPD的一生,参考了10年的服务,成为断点的生存。连接器设计非常重视,以改善牙齿之间的区域中的光滑应力模式。该地区也因生物学和美学原因而受到限制。由于脆性,陶瓷材料在FPD中呈现出升高的故障率。使用涂抹的骨折方法(连续损坏机械机械),该工作旨在预测不同负载条件的骨折抗性。结果与实验证据很好。

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