使用纤维素纳米纤维素改善矿物三氧化物聚合物水泥的固定性能
Hiroki Okuda1, Miki Inada2, Tomoya Konishi3
1Department of Pulp Biology and Endodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Dental materials journal
|January 3, 2024
概括
将纤维素纳米纤维素 (CNF) 添加到矿物三氧化物聚合物 (MTA) 混凝土中,可以改善水下固定性能. 通过防止材料分解,CNF增强的MTA对牙科应用具有前景.
科学领域:
- 生物材料科学 生物材料科学
- 材料工程 材料工程 材料工程
- 牙科材料 牙科材料
背景情况:
- 纤维素纳米纤维 (CNF) 是一种先进的纳米材料,以其在复合材料中的特殊机械增强而闻名.
- 矿物三氧化物聚合物 (MTA) 水泥在牙科中广泛使用,但可以表现出不稳定性,特别是在水的条件下.
- 了解CNF和MTA水泥之间的相互作用对于开发更坚固的牙科材料至关重要.
研究的目的:
- 研究将纤维素纳米纤维 (CNF) 纳入两个商业矿物三氧化物聚合物 (MTA) 水泥的影响.
- 评估对水下设置特征,压力强度和流动性的影响.
- 确定CNF修饰的MTA在改善临床性能方面的潜力.
主要方法:
- 商业MTA水泥 (NEX MTA和ProRoot® MTA) 经过修改,使用了不同度的CNF悬浮剂.
- 在水下沉浸后评估了水下设置特性.
- 在湿气和水浸泡条件下设置后,测量了压力强度.
- 测量了水泥混合物的流动性.
主要成果:
- 没有CNF的NEX MTA在水中浸泡时分解;然而,CNF修改后的NEX MTA显示出稳定的水下环境.
- 在水中浸泡后,ProRoot® MTA (PR) 保持完整性,由于CNF添加而没有显著的强度降低.
- 经CNF修改的NEX MTA在空气中的压力强度与未经修改的水泥相当.
- 随着CNF含量的增加,NEX MTA的流动性下降,高达1.0 w/v%.
结论:
- 纤维素纳米纤维显著提高了特定矿物三氧化物聚合物 (MTA) 水泥的水下稳定性,防止分解.
- 纳入CNF提供了一个有希望的策略,以提高MTA水泥在潮湿的口腔环境中的可靠性.
- 经CNF修改的MTA水泥有可能在各种牙科手术中得到更广泛,更可靠的应用.
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