牙科光固化树脂复合材料的特征,包括多种修饰的低收缩单体
Zhongyuan Wu1, Ke Sun2, Wenshun Wang2
1State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
概括
牙科树脂复合材料的减少聚合收缩被开发使用螺旋碳酸盐 (BMSOC) 和环氧 (ECHM-ECHC) 单体. 这些新型材料显示出改善牙科修复寿命和减少临床问题的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科材料 牙科材料
背景情况:
- 聚合缩小是牙树脂复合材料的一个主要限制,导致二次虫和恢复失败.
- 开发低收缩的牙科材料对于改善牙科修复的寿命和临床性能至关重要.
研究的目的:
- 合成并将新型的螺旋碳酸盐 (BMSOC) 和环氧 (ECHM-ECHC) 单体纳入基于双-S-bis (((3-甲基拉托-2-基) 乙烯 (BisS-GMA) 的树脂复合材料中.
- 评估这些单体对聚合物收缩,转化程度,机械性能,微泄漏和生物相容性的影响.
主要方法:
- 树脂复合材料的配方包括BisS-GMA,BMSOC,ECHM-ECHC,无机填充剂和光启动剂.
- 准备了五个实验组,使用Bis-GMA/TEGDMA复合物作为对照组.
- 评估了聚合收缩,转化程度,边缘微漏,可湿性,屈曲强度,屈曲模量和生物相容性.
主要成果:
- 与对照组相比,含有BMSOC和ECHM-ECHC的BisS-GMA基复合材料显示出显著减少的聚合收缩.
- 最低的聚合收缩率 (0.96 ± 0.08%) 在 BisS-GMA: ((Epoxy + BMSOC) 比率为 4: 6 的情况下实现.
- 实验性复合材料显示了改进的转化程度,最小的微泄漏,低水友性,增强的机械性能和合格的生物相容性.
结论:
- 在基于BisS-GMA的树脂复合材料中加入多种改性低收缩单体 (BMSOC和ECHM-ECHC) 有效地减少了聚合收缩.
- 这些新型复合材料显示出增强牙科修复寿命和预防与聚合物缩小相关的临床问题的潜力.
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