对植入物支的固定假肢基结构材料与不同横截面几何形状的抗裂性能进行比较
Oğuzhan Yılmaz1, Ayşegül Göze Saygın2, Giray Bolayır1
1Faculty of Dentistry - Department of Prosthodontics, Sivas Cumhuriyet University, Sivas, Turkey.
连接器的设计显著影响了由,PEEK和FRC材料制成的植入式假肢的断裂阻力. 带有三角连接器的体显示出最高的阻力,而带有圆连接器的PEEK显示出最低的阻力.
科学领域:
- 生物材料科学 生物材料科学
- 牙科材料科学 牙科材料科学
- 牙修复 牙修复 牙修复 牙修复 牙修复
背景情况:
- 牙假体基结构材料需要强大的抗折断性,以获得长期的临床成功.
- 热机械老化对于模拟口内条件和评估材料耐用性至关重要.
- 连接器设计是影响多单元植入物修复的机械完整性的关键因素.
研究的目的:
- 在热机械老化后,比较三种假肢基结构材料 (齐尔科尼亚,PEEK,FRC) 的断裂阻力.
- 评估不同连接器设计 (三角形,方形,圆形) 对植入式假肢骨折耐力的影响.
主要方法:
- 三种材料 (,PEEK,纤维增强复合材料) 被制造成72种植入式支持假肢,具有不同的连接器设计.
- 样品经历了动态加载和热力学老化 (120,000 个周期,120 N,5-55°C).
- 使用通用测试装置测量骨折阻力,并使用SEM分析和双向ANOVA进行统计评估.
主要成果:
- 材料类型和连接器设计都显著影响了断裂阻力 (p < 0.05).
- 带有三角连接器的体表现出最高的断裂阻力 (3200 ± 91.05 N),而带有圆连接器的PEEK显示出最低的 (2410 ± 157.23 N).
- 在材料之间观察到显著的差异 (齐尔科尼亚与齐尔科尼亚). 在PEEK,Zirconia和FRC之间) 和在Zirconia的连接器设计中. 断裂模式各不相同,有的变形和PEEK和FRC的断裂.
结论:
- 连接器设计是3个单元植入物修复中断裂阻力的重要决定因素,这些植入物修复用,PEEK和FRC制成.
- 虽然存在材料差异,但所有测试材料在模拟的力下表现相似.
- 优化连接器设计对于提高植入式假肢的寿命和可靠性至关重要.
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