中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (30): 4800-4805.doi: 10.3969/j.issn.2095-4344.0981

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials • 上一篇    下一篇

3D打印聚乳酸-左旋多巴复合骨替代材料的亲水性及力学性能

郑 晨1,王明晓1,刘 波1,张丽菊2,张 娜2,王玉光3,王志强3   

  1. 遵义医学院珠海校区,1生理学教研室,2预防医学教研室,广东省珠海市 519041;3武警后勤学院附属医院骨科,天津市 300162
  • 收稿日期:2018-05-08 出版日期:2018-10-28 发布日期:2018-10-28
  • 通讯作者: 王玉光,医师,武警后勤学院附属医院骨科,天津市 300162
  • 作者简介:郑晨,女,1988年生,浙江省温州市人,汉族,2017年天津医科大学毕业,博士,副教授,主要从事神经电生理及组织工程研究。

Hydrophilic and mechanical properties of 3D printed polylactic levodopa as alternative material for bone regeneration

Zheng Chen1, Wang Ming-xiao1, Liu Bo1, Zhang Li-ju2, Zhang Na2, Wang Yu-guang3, Wang Zhi-qiang3   

  1. 1Department of Physiology, 2Department of Preventive Medicine, Zhuhai Campus of Zunyi Medical University, Zhuhai 519041, Guangdong Province, China; 3Department of Orthopedics, Affiliated Hospital of Logistics University of People’s Armed Police Force, Tianjin 300162, China
  • Received:2018-05-08 Online:2018-10-28 Published:2018-10-28
  • Contact: Wang Yu-guang, Physician, Department of Orthopedics, Affiliated Hospital of Logistics University of People’s Armed Police Force, Tianjin 300162, China
  • About author:Zheng Chen, MD, Associate professor, Department of Physiology, Zhuhai Campus of Zunyi Medical University, Zhuhai 519041, Guangdong Province, China

摘要:

文章快速阅读:

 

文题释义:
聚乳酸:单个的乳酸分子中有一个羟基和一个羧基,多个乳酸分子在一起,-OH与其他分子的-COOH脱水缩合,-COOH与其他分子的-OH脱水缩合,如此循环形成聚乳酸,其具有良好的生物可降解性,使用后能被自然界中微生物在特定条件下完全降解,最终生成二氧化碳和水。
多巴:是海洋贻贝等生物分泌黏液的重要组成部分,具有很强的黏附性,不仅可以黏附在无机材料表面, 也可以黏附在有机材料表面,这些黏液蛋白质水解之后的氨基酸片段中,每1 000个氨基酸结构片段中可能含有105个多巴残基结构,130个羟基脯氨酸残基结构,210个赖氨酸残基结构。
 
 
背景:传统的聚乳酸有机高分子材料存在细胞相容性较差、机械强度不足等问题。
目的:评价3D打印新型聚乳酸-左旋多巴复合材料的力学性能及生物相容性。
方法:采用3D打印技术制备聚乳酸支架材料(空白组);采用溶剂冷凝冻干挥发法在聚乳酸支架表面分别进行左旋多巴表面修饰(实验组)与无溶质修饰(对照组),检测3组支架的亲水角、耐压强度、抗弯强度及抗磨损能力。

结果与结论:①空白组、实验组、对照组的亲水角分别为(89±5)°,(36±2)°,(87±4)°,实验组低于空白组、对照组(P < 0.05);②空白组、实验组、对照组的最大抗压强度分别为142.3,149.4,140.6 N,实验组高于空白组、对照组(P < 0.05);③空白组、实验组、对照组的最大抗弯曲力分别为55.8,95.7,56.7 N,实验组高于空白组、对照组(P < 0.05);④在0-3 min内,实验组材料的摩擦系数、磨损体积最小;6 min后,各组材料摩擦系数趋近平行。实验组材料的磨损体积在实验3 min内最低,与其他两组比较差异有显著性意义,    6 min后3组间磨损体积比较无差异;⑤结果表明,聚乳酸-左旋多巴复合材料具有优良的力学性能及生物相容性。

ORCID: 0000-0003-2490-3119(郑晨)

关键词: 复合材料, 亲水角, 左旋多巴, 聚乳酸, 摩擦系数, 3D打印, 生物材料

Abstract:

BACKGROUND: There are some disadvantages in traditional polylactic organic polymer materials such as poor cell compatibility and insufficient mechanical strength.

OBJECTIVE: To evaluate the mechanical properties and biocompatibility of 3D printed polylactic levodopa composites.
METHODS: Polylactic scaffold materials were prepared by 3D printing technology (blank group); surface modifications (experimental group) and solute-free modifications (control group) were performed on the surface of polylactic scaffolds by solvent condensation and freeze drying volatilization method. In present study, the hydrophilic angle, compression strength, bending strength, and wear resistance of the above three groups were examined.

RESULTS AND CONCLUSION: (1) The hydrophilic angles of the blank group, the experimental group and the control group were (89±5)°, (36±2)°, and (87±4)°, respectively, which was significantly less in the experimental group than the other two groups (P < 0.05). (2) The maximum compressive strengths of the blank group, the experimental group, and the control group were 142.3 N, 149.4 N, and 140.6 N, respectively, which was significantly higher in the experimental group than the other two groups (P < 0.05). (3) The maximum bending resistance of the blank group, the experimental group, and the control group were 55.8 N, 95.7 N, and 56.7 N, respectively, which was significantly higher in the experimental group than the other two groups (P < 0.05). (4) Within 3 minutes, the friction coefficient and the wear volume of the experimental group were the smallest among the three groups; after 6 minutes, there was no significant difference in the friction coefficients among the three groups. The above results reveal that polylactic levodopa composites have excellent mechanical properties and biocompatibility.

Key words: Levodopa, Contact Lenses, Hydrophilic, Biomechanics, Tissue Engineering

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