中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (6): 833-837.doi: 10.3969/j.issn.2095-4344.0676

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

3D打印羟基磷灰石/聚乳酸网状复合物修复颅骨缺损

刘 冬,秦 虎,汪永新,李亚宾,高 勇,范国锋,王增亮   

  1. 新疆医科大学第一附属医院神经外科,新疆维吾尔自治区乌鲁木齐市 830000
  • 收稿日期:2018-07-25 出版日期:2019-02-28 发布日期:2019-02-28
  • 通讯作者: 王增亮,博士,副教授,副主任医师,硕士生导师,新疆医科大学第一附属医院神经外科,新疆维吾尔自治区乌鲁木齐市 830000
  • 作者简介:刘冬,男,1992年生,陕西省商县人,汉族,医师,主要从事神经外科临床及基础研究。
  • 基金资助:

    新疆维吾尔自治区自然科学基金(2016D01C326)

3D-printed hydroxyapatite/polylactic acid network composites for skull defects

Liu Dong, Qin Hu, Wang Yongxin, Li Yabin, Gao Yong, Fan Guofeng, Wang Zengliang   

  1. Department of Neurosurgery, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Received:2018-07-25 Online:2019-02-28 Published:2019-02-28
  • Contact: Wang Zengliang, MD, Associate professor, Associate chief physician, Master’s supervisor, Department of Neurosurgery, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • About author:Liu Dong, Physician, Department of Neurosurgery, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    the Natural Science Foundation of Xinjiang Uygur Autonomous Region, No. 2016D01C326

摘要:

文章快速阅读:

 

文题释义:
聚乳酸:
是一种无毒、生物相容性优良、机械强度较高的有机物,能够较容易地通过人工技术合成,并且其具有一定的可降解性,其缺点是生物活性不高,主要是亲水性不足,导致细胞黏附率不高。
3D打印技术:作为一种快速成型技术,已被广泛应用于医学领域,不同于传统的制造方法,3D打印技术能够在术前对于颅骨缺损支架的材料比例、孔隙度、孔径率等指标进行综合把控,同时结合CT扫描三维重建技术,能够达到精准化、个性化治疗的目的。
颅骨修补材料的特点:射线可透,耐感染,不导热或冷,抗生物力学过程,可延展以适应并完全闭合缺损,价格低廉。


背景:羟基磷灰石/聚乳酸复合材料具有良好的生物相容性及骨诱导性,但评价这种复合物作为颅骨修补材料的可行性研究较少。
目的:观察3D打印羟基磷灰石/聚乳酸网状复合物修复兔颅骨缺损的可行性。
方法:取12只新西兰兔,在每只兔颅骨上制备2个直径约1 cm的颅骨全层缺损,其中1个植入3D打印羟基磷灰石/聚乳酸网状复合物,另一个植入自体骨粉,植入6,12周时取颅骨缺损标本,进行形态学、硬度检测、病理组织学观察。
结果与结论:①植入12周时,对照组可观察到缺损轮廓,缺损已基本修复;实验组缺损已被新生骨组织及纤维组织完全填充,与周围正常骨组织形成一体,整体轮廓自然,缺损边界模糊,难以辨认,部分植入物出现降解,颅骨内侧面缺损处新生骨与周围衔接自然;②植入6周时,实验组修复区显微硬度较对照组低(P < 0.05),两组均未达到正常骨质硬度(P < 0.05);植入12周时,实验组修复区显微硬度与对照组、正常组无差异;③植入6周时,实验组可见骨小梁形成良好,骨小梁间部分连接,且大部分延颅骨缺损方向排列有序,并可见新生血管与骨髓腔形成;对照组可见骨小梁厚度较好但方向杂乱不规则。植入12周时,实验组可见致密的骨小梁形成且连接良好,材料间有骨细胞及骨小梁穿行;对照组可见骨小梁厚度良好但排列方向较不规整,其间能见血管及骨单位存在,骨髓腔形成良好。④结果表明,3D打印羟基磷灰石/聚乳酸网状复合体植入物具有生物相容性好、诱导骨再生、可降解等特点,能够有效修复颅骨缺损。

ORCID: 0000-0003-2943-1691(刘冬)

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

关键词: 3D打印羟基磷灰石/聚乳酸, 3D打印, 网状复合物, 颅骨修补, 颅骨缺损

Abstract:

BACKGROUND: Hydroxyapatite (HA)/polylactic acid (PLA) composite has good biocompatibility and osteoinductivity, but few studies have evaluated the feasibility of this composite used as a skull repair material.

OBJECTIVE: To observe the feasibility of 3D-printed HA/PLA network composite in the repair of rabbit skull defects.
METHODS: Twelve New Zealand rabbits were selected and two full-thickness defects of about 1 cm in diameter were prepared on the skull of each rabbit. One of them was implanted with 3D printed HA/PLA network composite and the other was implanted with autologous bone powder. The skull samples were taken at 6 and 12 weeks after implantation for morphological, hardness, and histopathological observations.
RESULTS AND CONCLUSION: (1) At 12 weeks after implantation, the defect profile was observed in the control group, and the defect was basically repaired; the defect in the experimental group was completely filled with new bone tissues and fibrous tissues, and was integrated with the surrounding normal bone tissues. The overall contour was natural and the defect boundary was blurred. Some of the implants were degraded, and the new bones in the inner side of the skull defect converged with the surrounding tissues. (2) At 6 weeks after implantation, the microhardness of the repaired area in the experimental group was lower than that in the control group (P < 0.05), both of which were lower than the hardness of normal bone (P < 0.05). At 12 weeks after implantation, the microhardness of the repaired area in the experimental group showed no difference from that of the control group and the normal group. (3) At 6 weeks after implantation, the bone trabeculae formed well in the experimental group and were interconnected partly, most of which extended along the skull defect in an orderly manner. Moreover, neovascularization and bone marrow cavity formed. In the control group, the thickness of trabecular bone was better but the alignment was irregular. At 12 weeks after implantation, dense bone trabeculae formed in the experimental group with good connectivity. There were bone cells and trabecular bones in the implants. In the control group, the thickness of bone trabeculae was good, but the alignment was irregular. Blood vessels and bone units could be seen, and the marrow cavity formed well. Overall, these findings suggest that the 3D-printed HA/PLA network composite has good biocompatibility, osteoinduction, and biodegradability, which can be used for skull repair effectively. 

Key words: Hydroxyapatites, Compomers, Skull, Tissue Engineering

中图分类号: