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在热机械老化后,内冠的断裂强度

Burcu Dikici¹, Esra Can², Elif Türkeş Başaran¹

¹Faculty of Dentistry, Department of Restorative Dentistry, Yeditepe University, Istanbul, Turkey.

|January 30, 2024

概括

与陶选项相比,复合计算机辅助设计/计算机辅助制造 (CAD/CAM) 内冠显示出优越的断裂强度和可修复的故障模式. 这项研究强调了材料选择对内冠耐用性和临床寿命的影响.

科学领域:

牙科材料科学牙科材料科学
生物材料工程生物材料工程
恢复性牙科恢复性牙科

背景情况:

内冠是一种可行的修复选择,用于内牙治疗的牙.
评估各种CAD/CAM材料的机械性能对于临床成功至关重要.
热力学老化模拟口内条件,以评估材料的耐用性.

研究的目的:

为了比较模拟老化后不同CAD/CAM内冠材料的断裂强度 (FS).
分析复合材料,田地和玻璃陶内冠的故障模式.
根据机械性能来确定CAD/CAM内分冠的临床适用性.

主要方法:

在实验室中对七个CAD/CAM内冠材料组进行了评估,包括复合材料,合金增强酸,白石增强地和地陶.
在经过内牙治疗的牙上标准化的内冠制剂.
热力学老化模拟了2万个热周期和48万个负荷周期.
使用通用测试机器进行断裂强度测试.

主要成果:

在测试材料中,断裂强度有显著差异 (p=0.00).
复合材料 (CS) 和烧焦的酸 (CD) 显示出最高的FS,相当于完整的牙.
菲尔德斯帕特 (CE) 材料表现出最低的FS和主要不可修复的骨折,与复合材料和CD不同.
所有测试的材料都承受了临床相关的力,但复合材料和CD提供了更有利的骨折模式.

结论:

复合材料和烧焦合金加强酸CAD/CAM内冠提供优越的断裂阻力和有利的故障模式.
Feldspathic和leucite增强的地陶内冠可能存在更高的不可修复的骨折风险.
材料选择对于优化CAD/CAM内冠修复的长期性能和耐用性至关重要.

关键词:

计算机辅助设计/计算机辅助制造 (CAD/CAM)内部冠状内部冠状内部冠状断裂强度强度的断裂强度是什么热机械老化热机械老化

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