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张静超, 莫安春, 李吉东等. HA/PMMA纳米复合暂冠材料的合成及其性能表征和细胞相容性检测[J]. koko体育app 学报(医学版), 2014, 45(3): 502-505.
引用本文: 张静超, 莫安春, 李吉东等. HA/PMMA纳米技术黏结暂冠相关材料的合成图片试述功能分析方法和上皮细胞相匹配性的检测[J]. 杭州二本大学学报(医学研究版), 2014, 45(3): 502-505.
MO An-chun, ZHANG Jing-chao, LI Ji-dong.et al. Characteristics of Hydroxyapatite/PMMA Nanocomposites for Provisional Restoration and Its Biocompatibility withHuman Gingival Fibroblasts[J]. Journal of Sichuan University (Medical Sciences), 2014, 45(3): 502-505.
Citation: MO An-chun, ZHANG Jing-chao, LI Ji-dong.et al. Characteristics of Hydroxyapatite/PMMA Nanocomposites for Provisional Restoration and Its Biocompatibility withHuman Gingival Fibroblasts[J]. Journal of Sichuan University (Medical Sciences), 2014, 45(3): 502-505.

HA/PMMA纳米复合暂冠材料的合成及其性能表征和细胞相容性检测

Characteristics of Hydroxyapatite/PMMA Nanocomposites for Provisional Restoration and Its Biocompatibility withHuman Gingival Fibroblasts

  • 摘要: 目的 合成具有良好生物相容性的羟基磷灰石 (HA)/聚甲基丙烯酸甲酯 (PMMA) (H/P)复合暂时冠材料。 方法 将一定量的纳米HA与PMMA混合,分别合成HA质量分数为20% (20 wt%)、30% (30 wt%)、40% (40 wt%)、50% (50 wt%)的4组复合材料。此复合材料经固化、打磨、抛光,扫描电镜 (SEM)观察其表面微结构。将人牙龈成纤维细胞接种在以上各组及纯PMMA组、纯钛组样本表面,共同培养24 h后,免疫荧光标记细胞骨架;培养1、3、5、7 d后,MTT法测细胞活力。 结果 SEM结果显示,20 wt% H/P组和30 wt% H/P组的纳米HA团聚体基本被PMMA基质所覆盖,40 wt% H/P组样本表面的团聚体尺寸小而均匀,直径约为2~4 μm,而在50 wt% H/P组表面,团聚体直径达到5~10 μm,表面可见较多裂隙。40 wt% H/P组和50 wt% H/P组细胞铺展成长梭形,其他H/P组及纯PMMA组细胞较圆缩。40 wt% H/P组各时点细胞活力与纯钛组的差异无统计学意义 (P>0.05);其余H/P组及纯PMMA组细胞活力多低于纯钛组,差异有统计学意义 (P<0.05)。 结论 40 wt%H/P生物相容性接近纯钛,有望用于种植修复暂时冠材料,改善软组织美学。  
    Abstract: Objective To formulate hydroxyapatite(HA)/polymethyl methacrylate (PMMA) composites with improved cytocompatibility for provisional restoration. Methods Nanocomposites with 20 wt%,30 wt%,40 wt%,and 50 wt% HA/PMMA (H/P) were developed and examined using X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). Human gingival fibroblasts were cultured on those HA/PMMA discs and investigated by fluorescent staining on 24 h and MTT assay at 1 d, 3 d, 5 d and 7 d. Results Chemical integration of HA/PMMA interface was confirmed by XPS. Typical fusiform cells with adhesion spots were detected on 40 wt% and 50 wt% H/P discs. MTT results showed insignificant differences in cell growth between 40 wt% H/P and pure titanium (Ti,P>0.05), while the other H/P discs showed significantly lower cell growth than pure Ti (P<0.05). Conclusion 40 wt% H/P might be a promising candidate for provisional dental implant restoration and for esthetic gingival contour.  
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