口腔医学研究 ›› 2022, Vol. 38 ›› Issue (8): 725-730.DOI: 10.13701/j.cnki.kqyxyj.2022.08.006

• 龋病牙髓病学研究 • 上一篇    下一篇

牙釉质表面气相SiO2/PDMS超疏水涂层制备及其细胞毒性与抗菌性能评价

吴一豪1, 朱莉1, 周鑫1, 骆怡璇1, 黄盛斌1,2, 林继兴1,2, 麻健丰1,2*   

  1. 1.温州医科大学口腔医学研究所 浙江 温州 325027;
    2.温州医科大学口腔医学院附属口腔医院 浙江 温州 325007
  • 收稿日期:2021-12-30 出版日期:2022-08-28 发布日期:2022-08-24
  • 通讯作者: *麻健丰,E-mail:dentistmacn@aliyun.com
  • 作者简介:吴一豪(1996~ ),男,浙江温州人,硕士在读,研究方向:口腔修复学。
  • 基金资助:
    国家自然科学基金(编号:81870813)温州市重大科技专项(编号:2018ZY012)

Preparation of Fumed Silica/polydimethylsiloxane Superhydrophobic Coating on Tooth Enamel Surface and Evaluation of Its Cytotoxicity and Antibacterial Ability

WU Yihao1, ZHU Li1, ZHOU Xin1, LUO Yixuan1, HUANG Shengbin1,2, LIN Jixing1,2, MA Jianfeng1,2*   

  1. 1. Institute of Stomatology, Wenzhou Medical University, Wenzhou 325027, China;
    2. School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325007, China
  • Received:2021-12-30 Online:2022-08-28 Published:2022-08-24

摘要: 目的: 在牙釉质表面制备气相二氧化硅(SiO2)/聚二甲基硅氧烷(PDMS)超疏水涂层,并评价涂层的细胞毒性与抗菌性能。方法: 将不同质量百分比的亲/疏水SiO2、PDMS溶于正己烷及其他相关助剂中形成悬浮溶液,喷涂于牙釉质表面形成超疏水涂层。采用接触角测量仪测量涂层的静态接触角及动态接触角;扫描电镜(SEM)观察微观结构;X射线光电子能谱(XPS)分析化学组成;傅立叶变换红外吸收光谱仪(FTIR)分析涂层内基团;MTT比色法检测细胞毒性;自动菌落形成实验(CFU)法验证其抗变形链球菌粘附能力。结果: 亲/疏水性 SiO2质量比为1∶1时,涂层具有最好的疏水效果,其静态接触角(CA)为164°,动态接触角(SA)为1.4°;其超疏水效果来源于纳米SiO2粒子提供的表面粗糙度和PDMS提供的低表面能;MTT 结果显示该涂层具有较好的细胞相容性;抗菌实验结果表明,超疏水涂层抗菌效果明显优于对照组,6 h以内抗粘附效果稳定,抗粘附效率达到87%以上。结论: 成功在牙釉质表面构建了生物相容性的超疏水涂层,该涂层具有较好的抗变形链球菌粘附能力,为开发口腔防龋喷剂提供思路。

关键词: 超疏水, 抗菌, 抗粘附, 变形链球菌, 聚二甲基硅氧烷

Abstract: Objective: To prepare fumed silica/polydimethylsiloxane (SiO2/PDMS) superhydrophobic coating on the surface of tooth enamel, and evaluate the cytotoxicity and antibacterial ability of the superhydrophobic coating. Methods: Different mass percentages of hydrophilic and hydrophobic SiO2 and PDMS were dissolved in n-hexane and other related additives to form suspension solution and sprayed on enamel surface to form superhydrophobic coating. The contact angle and sliding angle of coating were measured by contact angle measuring instrument. Scanning electron microscopy (SEM) was used to observe the microstructure. X-ray photoelectron spectroscopy (XPS) was used to analyze its element concentration. Fourier transform infrared absorption spectrometer (FTIR) was used to analyze the inner group of the coating. Cytotoxicity test was performed to detect its biocompatibility. Automatic colony forming unit (CFU) was used to verify its anti- streptococcus mutans adhesion ability. Results: The best hydrophobic effect was when the hydrophilic fumed silica: hydrophobic fumed silica was 1∶1. At this moment, the average contact angle reached 164°, and the sliding angle reached 1.4°. The superhydrophobic effect comes from the surface roughness provided by nano-SiO2 particles and the low surface energy provided by PDMS. MTT results showed that the coating had good biocompatibility. Antibacterial test showed that the antibacterial effect of superhydrophobic coating was better than that of control group. The anti-adhesion effect was stable within 6 h, reaching more than 87%. Conclusion: A biocompatibility superhydrophobic coating was successfully constructed on the enamel surface. The coating has good adhesion resistance to Streptococcus mutans, which provides ideas for the development of oral caries prevention sprays.

Key words: superhydrophobic, antibacterial, anti adhesion, Streptococcusmutans, PDMS