设计具有高性能牙粘合剂热收缩单元的非常规聚合物
Qiangsheng Sun1, Yudi Feng1, Ke Jin1
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China.
ACS applied materials & interfaces
|August 22, 2024
概括
开发了具有低热膨胀系数 (CTE) 的新型牙粘合剂. 这些粘合剂在牙科修复中显著提高了粘合强度和寿命,减少了温度变化造成的故障.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料是一种生物材料.
- 牙科材料 牙科材料
背景情况:
- 由于口腔温度波动,热膨胀系数 (CTE) 对牙粘合剂至关重要.
- 粘合材料之间的CTE不匹配会导致热应力,导致牙科修复中裂纹和粘合失败.
- 像单键通用 (SBU) 这样的商业粘合剂在热循环下保持债券完整性方面面临挑战.
研究的目的:
- 设计和合成用于牙科应用的新型低CTE粘合剂.
- 为了将含有二环氧八二烯 (DBCOD) 单元的二维尼尔单体纳入商业粘合剂 (SBU).
- 评估减少CTE对牙粘合剂的剪接强度和耐久性的影响.
主要方法:
- 合成了一种新的divinyl单体与一个二子环氧八二烯 (DBCOD) 单元.
- 将DBCOD单体纳入单键通用 (SBU) 中,以创建低CTE粘合剂.
- 在10,000个热循环 (5-55°C) 之前和之后,测试了与基结合的复合树脂的剪接强度.
主要成果:
- 在开发的粘合剂中,达到低至6.5ppm/K的可调节的CTE值.
- 低CTE粘合剂在热循环后保持了74.6%和61.9%的原始剪接强度.
- 纯SBU仅保留了原来的剪接强度的44.7%,表明新粘合剂的耐用性优越.
结论:
- 开发的低CTE粘合剂显著提高了牙科修复中的剪接强度和耐用性.
- 由于较低的CTE,减少了界面应力和变形,有助于改善债券寿命.
- 这些新型粘合剂为长期和可靠的牙修复提供了有希望的解决方案.
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