增材制造的结合强度增强:微设计方法
Rama B Al-Rashdan1, Charles Beard1, Fei Liu1
1Department of Biologic and Materials Sciences & Prosthodontics, University of Michigan, Ann Arbor, Michigan, USA.
概括
在增材制造的合金上设计的微纹理显著提高了对支柱的粘合强度. 与传统方法相比,这些有纹理的表面增强了保留力.
科学领域:
- 牙科材料科学
- 生物材料工程
- 添加剂制造
背景情况:
- 在牙科修复中广泛使用.
- 增材制造 (AM) 提供了定制牙假体的潜力.
- 提高AM的结合强度对临床成功至关重要.
研究的目的:
- 评估数字设计的微型保持特征对增材制造 (AM) 合物的结合强度的影响.
- 为了比较 AM 合物与微纹理的保留强度与减法制造 (SM) 和非纹理的 AM 合物.
主要方法:
- 60个支柱被分为四组:SM,AM没有纹理 (AM-N),AM有120μm纹理 (AM-120) 和AM有240μm纹理 (AM-240).
- 使用树脂水泥粘合.
- 使用通用测试机测量了拉力强度.
主要成果:
- 与SM (574. 5N) 和AM-N (450. 7N) 组相比,AM-120和AM-240组的拉伸强度显著更高 (990. 8N和1097N).
- 在SM和AM-N组之间没有发现显著差异 (p > 0.05).
- 在两个有纹理的AM组之间没有发现显著差异 (p > 0. 05).
结论:
- 在AM上设计的反向金字塔微纹理显著提高了Ti基支柱的保持强度.
- 这些微纹理有效模拟蚀刻的表面,改善机械互锁.
- 具有微保留特征的AM片为改善牙修复稳定性提供了非纹理AM和SM片的优质替代品.
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