中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (30): 4876-4881.doi: 10.3969/j.issn.2095-4344.0987

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

可降解镁合金颅骨固定系统在动物实验中的安全性及有效性

刘天甲1,顾 硕2,周 璐3,钟家斐1,袁广银4   

  1. 1上海交通大学医学院附属上海儿童医学中心神经外科,上海市 200127;2海南省妇幼保健院小儿神经外科,海南省海口市 570206;3上海交通大学医学院附属第九人民医院超声科,上海市 200001;4上海交通大学材料科学与工程学院,上海市 200240
  • 收稿日期:2018-05-20 出版日期:2018-10-28 发布日期:2018-10-28
  • 通讯作者: 顾硕,主任医师,海南省妇幼保健院小儿神经外科,海南省海口市 570206
  • 作者简介:刘天甲,男,1994年生,山东省曹县人,汉族,上海交通大学医学院在读硕士,医师,主要从事小儿神经外科学研究。
  • 基金资助:

    上海交大医工交叉基金(YG2013MS70)

Safety and effectiveness of a biodegradable magnesium alloy fixation system in animals

Liu Tian-jia1, Gu Shuo2, Zhou Lu3, Zhong Jia-fei1, Yuan Guang-yin4   

  1. 1Department of Neurosurgery, Shanghai Children’s Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China; 2Department of Neurosurgery, the Maternal and Child Health Hospital of Hainan Province, Haikou 570206, Hainan Province, China; 3Department of Ultrasound, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, China; 4School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2018-05-20 Online:2018-10-28 Published:2018-10-28
  • Contact: Gu Shuo, Chief physician, Department of Neurosurgery, the Maternal and Child Health Hospital of Hainan Province, Haikou 570206, Hainan Province, China
  • About author:Liu Tian-jia, Master candidate, Physician, Department of Neurosurgery, Shanghai Children’s Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
  • Supported by:

    the Medical Cross Fund of Shanghai Jiao Tong University, No. YG2013MS70

摘要:

文章快速阅读:

 

文题释义:
新型可吸收镁合金:研究所用材料为交通大学材料学院提供的Mg-Nd-Zn-Zr专利镁合金,与其余医用金属材料相比的优势:生物安全性高,其组成成分为人体所需各种元素,并在体内缓慢降解,生物毒性符合临床要求;最大优势为可在体内缓慢降解,避免二次手术取出;其弹性模量、密度和颅骨更加接近,可有效缓解应力屏蔽效应;原材料来源较丰富,成本较低。
颅骨固定系统:常用于神经外科手术的颅骨骨瓣的固定,其主要包括皮质骨螺钉和接骨板,其必须具备良好的力学性能和生物安全性能以植入人体。
 
 
背景:国内外研究已证实新型镁合金的生物安全性,但尚未有关于镁合金颅骨固定系统相关研究的报道。
目的:探讨新型生物可降解镁合金颅骨固定系统植入健康新西兰大白兔后的安全性和有效性。
方法:将30只新西兰大白兔随机分2组,每组15只,空白对照组不进行任何处理,实验组建立新型生物可降解镁合金颅骨固定系统植入模型。术后14,30,90,180 d,检测两组血常规、凝血功能、肝肾功能、血清镁等指标;术后180 d,通过B超、CT及直视下观察实验组固定系统吸收情况及周围产气情况,采集实验组颅骨固定系统周围及空白对照组相同部位肌肉、颅骨、硬脑膜、脑等组织标本,进行组织切片观察。

结果与结论:①实验组术后不同时间点的白细胞、血小板、血红蛋白、血尿素氮、谷丙转氨酶、血清镁浓度与空白对照组比较无差异,两组各指标均维持在较稳定的状态;②颅部B超提示新型生物可降解镁合金固定系统周围无明显气体,可看出固定系统在逐步吸收,术后180 d CT三维重建显示该系统已吸收近50%,人造颅缝愈合顺利;③组织学观察显示,新型生物可降解镁合金固定系统未引起局部肌肉、颅骨、硬脑膜、脑组织的炎症与异物反应;④结果表明,新型生物可降解镁合金固定系统具有良好的组织相容性,植入新西兰兔体内安全有效。

ORCID: 0000-0002-4085-9499(刘天甲)

关键词: 镁合金, 可降解, 生物安全性, 动物实验, 固定系统, 生物材料

Abstract:

BACKGROUND: Biosecurity of new biodegradable magnesium alloys has been confirmed, but there is no report

on the use of magnesium alloy fixation system fixation systems.
OBJECTIVE: To make a preliminary research on the safety and effectiveness of the new biodegradable magnesium alloy fixation system in healthy New Zealand white rabbits in vivo.
METHODS: Thirty healthy New Zealand rabbits were randomized into experimental group in which the biodegradable magnesium alloy fixation system implantation model was established in each animal and control group in which no intervention was performed. Blood routine, hepatic and renal functions, coagulation functions and serum magnesium level were detected at 14, 30, 90, and 180 days after operation. B-ultrasound, CT scanning and operative field exposure were carried out to observe the absorption of fixation system and the impact of gas production at 180 days after operation. Muscle tissues, cranial bones, duramater and brain tissues around the fixation system and the corresponding parts in control group were taken at the same time for pathological observation.

RESULTS AND CONCLUSION: (1) There was no statistical difference between the two groups regarding the number of white blood cells and platelets, and levels of hemoglobin, blood urea nitrogen, alanine aminotransferase and serum magnesium at different time points after operation and all indicators maintained in a relatively stable state. (2) The results of cranial B-ultrasound showed the fixation system degraded gradually and no significant gas accumulated around it. CT scanning and operative field exposure revealed nearly 50% of the fixation system degraded at 180 days after operation, and the man-made cranial suture healed naturally. (3) Histological observation showed the JDBM fixation system did not cause the significant pathological changes and inflammatory reactions of surrounding tissues. These findings suggest that the histocompatibility of JDBM is ideal and the fixation system is safe and effective after implantation.

Key words: Alloys, Skull, Histocompatibility, Tissue Engineering

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