中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (21): 3322-3328.doi: 10.3969/j.issn.2095-4344.2014.21.008

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

TiAl6Vi4表面超疏水修饰后的体外抑菌实验

张  巍,张里程,张立海,魏军强,唐佩福   

  1. 解放军总医院骨科,北京市  100853
  • 出版日期:2014-05-21 发布日期:2014-05-21
  • 通讯作者: 唐佩福,主任医师,教授,博士生导师,解放军总医院骨科,北京市 100853
  • 作者简介:张巍,男,1980年生,河北省承德市人,解放军总医院毕业,博士,主治医师,主要从事骨科学研究。
  • 基金资助:

    解放军总医院科技创新苗圃基金课题(13KMM11)

Modification of superhydrophobic surface of TiAl6Vi4 and its bacteriostatic action in vitro

Zhang Wei, Zhang Li-cheng, Zhang Li-hai, Wei Jun-qiang, Tang Pei-fu   

  1. Department of Orthopaedics, General Hospital of Chinese PLA, Beijing 100853, China
  • Online:2014-05-21 Published:2014-05-21
  • Contact: Tang Pei-fu, Chief physician, Professor, Doctoral supervisor, Department of Orthopaedics, General Hospital of Chinese PLA, Beijing 100853, China
  • About author:Zhang Wei, M.D., Attending physician, Department of Orthopaedics, General Hospital of Chinese PLA, Beijing 100853, China
  • Supported by:

    the Nursery Foundation for Science and Technology Innovation in PLA General Hospital, No. 13KMM11

摘要:

背景:研究表明,材料表面亲、疏水性(即表面浸润性)是影响细菌黏附的重要原因。
目的:探讨钛金属TiAl6Vi4表面超疏水改性后对金黄色葡萄球菌的抑菌作用。
方法:将TiAl6Vi4板块经砂纸、酸溶液抛光和超声清洗后,随机分组:超疏水表面组采用电化学阳极氧化法在TiAl6Vi4表面制备TiO2纳米管薄膜,并通过氟硅烷自组装修饰;亲水表面组采用电化学阳极氧化法在TiAl6Vi4表面制备TiO2纳米管薄膜;疏水表面组对TiAl6Vi4表面行氟硅烷自组装修饰,分别测量3组表面的接触角。将3组样品浸泡于金黄色葡萄球菌菌液中2 h,观察样品表面细菌黏附和分布状态,以及浸泡过样品剩余菌液的A值。
结果与结论:亲水表面组表面多数金葡菌彼此聚集、重叠,呈葡萄串形态;疏水表面组表面细菌有聚在一起的趋势,但没有彼此重叠、覆盖,只是单层排列,没有形成葡萄串表面;超疏水表面组表面细菌分散排布,一般只有两三个细菌在一起,不成串,不重叠。3组表面随着亲水性的降低细菌数量逐渐减少,以超疏水表面组为最少,而且细菌相互分离的也更加明显。超疏水表面组剩余菌液的A值明显高于亲水表面组和疏水表面组(P < 0.05)。表明钛金属表面超疏水修饰能有效抑制金黄色葡萄球菌贴附。


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

关键词: 生物材料, 骨生物材料, 钛金属TiAl6Vi4, 细菌贴附, 超疏水, 钛金属, 感染

Abstract:

BACKGROUND: Studies have shown that the surface hydrophilicity and hydrophobicity (i.e., surface wettability) are important factors affecting bacterial adhesion.
OBJECTIVE: To observe the bacteriostatic action on Staphylococcus aureus after changing wettability on TiAl6Vi4 plates by surface modification.
METHODS: TiAl6Vi4 plates were buffered and polished, then divided into three groups, ten plates in each group. T1 group was prepared for TiO2 nanometer film on TiAl6Vi4 surface by electrochemically anodic oxidation method, and self-assembled PETS. T2 group was only prepared for TiO2 nanometer film. T3 group was only self-assembled PETS. All the groups were observed by contact angle measurements and Staphylococcus aureus adhesion on different surfaces was evaluated immersion in Staphylococcus aureus solution for 2 hours in vitro.
RESULTS AND CONCLUSION: Staphylococcus aureus on the plates with hydrophilic surfaces (T1 group) aggregated reciprocally and overlapped together in the shape of grape cluster while those on the hydrophobic surfaces (T2 group) displayed a tendency of aggregation, however resulting in monolayer but not in grape-cluster like shape. On the contrary, bacteria on the plates with superhydrophobic surfaces (T3 group) distributed dispersedly with no bacteria-clusters or strings. Furthermore, along with the decline of hydrophilia, bacteria counts decreased gradually, exhibiting an increasing trend of separation among bacteria as well. Absorbance value of T3 group remained significantly higher than that of T1 and T2 groups (P < 0.05). It is indicated that titanium superhydrophobic surfaces are able to reduce Staphylococcus aureus adhesion and useful for prevention implant related infection of orthopedics.


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words: biocompatible materials, titanium, Staphylococcus aureus, hydrophobic and hydrophilic interactions

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