Investigastion of the bonding mechanisms between veneering and framework material of all-ceramic dental restorations

全瓷牙修复体贴面与骨架材料粘接机制研究

• 批准号: 272425256
• 负责人: Professor Dr. Bernd Breidenstein
• 金额: --
• 依托单位: Klinik für Zahnärztliche Prothetik und Biomedizinische Werkstoffkunde
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/272425256?language=en
• 关键词: Investigastion; bonding; mechanisms; between; veneering

All-ceramic dental prosthesis offers outstanding biocompatibility, excellent mechanical properties and aesthetic appearance. Regarding the mechanical and optical properties, a restoration made of yttria stabilized tetragonal zirconia (framework material) and porcelain (veneering material) matches the natural tooth closer than any available alternative. Due to the wide range of indications, all-ceramic restorations have the potential to replace metal-ceramic prosthesis as the standard therapy. So far, the failure rate of ceramic frameworks is higher compared to conventionell restorations with a metal framework, due to a lower bond strength between the components. Understanding the bonding mechanisms between yttria stabilized tetragonal zirconia and porcelain bears the potential for targeted improvement regarding tooth fracture by generating matched subsurface properties of both ceramics. The research objective is the investigation of the bonding mechanisms and the failure mechanisms determined by the manufacturing chain, while producing all-ceramic restorations. The influence of the components material properties on the bond strength will be evaluated. Following the chain of production, the effects and interactions of the production processes on the surface and subsurface properties of both bonding partners will be determined. Concluding, an empirical model is build. After validity of the model the results are transferred to stylized restorations. The empirical model describes the bond strength of the system based on material properties and parameters of the production process. Following the manufacturing and machining strategy will by adapted to increase the lifetime of all-ceramic restorations.

全瓷假牙具有出色的生物相容性、优异的机械性能和美观的外观。关于机械和光学特性，由氧化钇稳定的四方氧化锆（框架材料）和瓷（饰面材料）制成的修复体比任何可用的替代品更接近天然牙齿。由于适应症广泛，全瓷修复体有潜力取代金属陶瓷修复体成为标准治疗方法。到目前为止，由于组件之间的结合强度较低，陶瓷框架的失败率比金属框架的传统修复体更高。了解氧化钇稳定的四方氧化锆和陶瓷之间的结合机制，有可能通过生成两种陶瓷匹配的次表面特性来有针对性地改善牙齿断裂问题。研究目标是研究生产全瓷修复体时由制造链决定的粘合机制和失效机制。将评估组件材料特性对粘合强度的影响。在生产链之后，将确定生产过程对两个粘合伙伴的表面和地下特性的影响和相互作用。最后，建立了实证模型。模型有效后，结果将转移到程式化修复体中。经验模型根据材料特性和生产过程参数描述系统的粘合强度。遵循制造和加工策略将通过调整来延长全瓷修复体的使用寿命。