通过直接和间接的修复恢复了牙的生物力学行为,并与深层边缘升高相结合
Rijkje A Bresser1, Marco A Carvalho2, Lucas Z Naves1
1University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, the Netherlands.
Journal of the mechanical behavior of biomedical materials
|February 23, 2024
概括
直接复合材料修复提供了比玻璃陶更容易修复的骨折,而玻璃陶在有深度近似修复的牙中更容易修复. 这项研究比较了疲劳生存率和骨折耐力,发现牙科修复的强度相似,但失败模式不同.
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:
- 对于有深度近似修复的牙的疲劳生存和骨折抵抗,特别是有或没有深度边缘升高 (DME) 的牙的理解有限.
- 在模拟的口腔条件下评估不同修复材料的机械行为,对于长期的临床成功至关重要.
研究的目的:
- 为了研究疲劳生存,骨折强度,失败模式和牙变形的牙恢复与深边缘升高 (DME) 结合直接复合或间接玻璃陶修复.
- 为了比较直接复合材料,混合材料 (DME与玻璃陶) 和全陶修复的机械性能,用深度制备在牙中.
主要方法:
- 使用了45个提取的人类牙,分为三组:直接复合,混合 (DME +玻璃陶) 和全陶修复.
- 样品经过疲劳测试 (1.2 x 10^6 周期),然后进行负载到故障测试. 有限元分析 (FEA) 评估了牙变形和拉伸应力.
- 统计分析包括克鲁斯卡尔-瓦利斯和费舍尔的精确测试,以评估骨折强度,类型和修复能力.
主要成果:
- 所有组的疲劳生存率和骨折强度都相似 (P > 0.05).
- 根据修复材料 (P <0.05) 发现骨折类型和修复能力存在显著差异.
- 与玻璃陶修复相比,直接复合材料修复显示出明显更多可修复的骨折,而玻璃陶修复显示出更多的冠根骨折.
结论:
- 虽然所有测试的修复方法都显示出类似的疲劳生存率和骨折强度,但直接复合材料修复提供了更有利的骨折特征和修复能力.
- 临床医生应考虑使用深玻璃陶内嵌的严重,无法修复的骨折的可能性,并可能选择直接复合材料修复,因为它们可以修复.
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