中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (30): 4769-4773.doi: 10.3969/j.issn.2095-4344.0977

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

全内置式可膨胀型生物涂层脊柱前路内固定系统最大剂量的致敏实验

黄学良,朱双芳,林雨聪,周初松   

  1. 南方医科大学珠江医院,广东省广州市 510282
  • 收稿日期:2018-05-27 出版日期:2018-10-28 发布日期:2018-10-28
  • 通讯作者: 周初松,主任医师,硕士生导师,南方医科大学珠江医院,广东省广州市 510282
  • 作者简介:黄学良,男,1991年生,广东省惠州市人,汉族,硕士,主要从事脊柱外科研究。
  • 基金资助:

    广东省科技计划项目(2013B091500073),名称:全内置式可膨胀型生物涂层脊柱前路内固定系统的研发;广州市科技计划项目(2014J4100131),名称:全内置式可膨胀型生物涂层脊柱前路内固定系统的研发

A unique built-in expandable bio-coating anterior spinal fixation: a sensitization test at the maximum sensitization dosage

Huang Xue-liang, Zhu Shuang-fang, Lin Yu-cong, Zhou Chu-song   

  1. Zhujiang Hospital, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • Received:2018-05-27 Online:2018-10-28 Published:2018-10-28
  • Contact: Zhou Chu-song, Chief physician, Master’s supervisor, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • About author:Huang Xue-liang, Master, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • Supported by:

    the Science and Technology Plan Project of Guangdong Province, No. 2013B091500073; the Science and Technology Plan Project of Guangzhou, No. 2014J4100131

摘要:

文章快速阅读:

 

文题释义:
全内置式可膨胀型生物涂层脊柱前路内固定系统
:由作者根据国人胸腰椎的解剖特点,自主研发的一种新型的胸腰椎前路内固定系统,由钛合金材料及其表面的羟基磷灰石涂层制造而成,术中需将脊柱螺钉及连接棒完全植入椎体及椎间隙中,对周围组织无干扰和压迫。
最大剂量的致敏实验:是将被测材料或其浸提液通过皮内注射诱导、局部诱导及激发3个阶段作用于实验动物,通过观察实验动物激发部位的皮肤反应或者在显微镜下观察炎症反应,来评价被测材料致敏性的动物实验。其原理为变异原引发T细胞介导产生的Ⅳ型迟发超敏反应,在皮内注射及局部贴敷致敏材料的两次诱导阶段中,致敏材料进入体内成为完全性抗原,并被提呈给有记忆功能的特异性T淋巴细胞,而在激发阶段,致敏材料再次进入实验动物体内,引发机体内被激活的T淋巴细胞释放炎性因子,从而引起周围组织损伤,出现红斑及水肿等致敏反应。


背景:前期实验证明全内置式可膨胀型生物涂层脊柱前路内固定系统具有良好的生物力学性能,可重建损伤胸腰椎的稳定性。
目的:进一步评价全内置式可膨胀型生物涂层脊柱前路内固定系统的致敏性。
方法:取全内置式可膨胀型生物涂层脊柱前路内固定系统浸提液(实验组)、生理盐水(阴性对照组)、体积分数5%甲醛溶液(阳性对照组),按《GB/T 16886.10-2005 医疗器械生物学评价第10部分刺激与迟发型超敏反应试验》规定的最大剂量致敏实验方法,进行豚鼠皮内注射诱导、局部诱导和激发实验。激发后除去敷贴片24,48 h后,观察各组动物激发部位皮肤情况,并按Magnusson和Kligman等级分级;激发阶段结束除去敷贴片72 h后,取腹部皮肤组织,显微镜下观察炎症情况。
结果与结论:①去除敷贴物24,48 h时,实验组和阴性对照组豚鼠腹部激发部位皮肤均未发生红斑及水肿等致敏反应,Magnusson和Kligman等级为0 级;阳性对照组豚鼠腹部激发部位皮肤均形成中度融合性红斑或严重红斑及水肿反应,部分可见结痂,Magnusson和Kligman等级为2至3级;②实验组和阴性对照组豚鼠腹部激发部位皮肤组织均未见中性粒细胞、淋巴细胞等炎性细胞,未见明显充血、水肿,炎症分级为Ⅰ级;阳性对照组豚鼠腹部激发部位的皮肤组织均可见以中性粒细胞或淋巴细胞为主的炎性细胞浸润反应,炎症分级为Ⅱ-Ⅳ级;③结果表明,全内置式可膨胀型生物涂层脊柱前路内固定系统未引起致敏反应,符合作为植入物在迟发性超敏反应实验中的要求。

ORCID: 0000-0002-5976-3227(黄学良)

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: 钛合金, 羟基磷灰石, 豚鼠, 生物相容性, 致敏反应, 生物材料

Abstract:

BACKGROUND: Previous experiments have proved that the unique built-in expandable bio-coating anterior spinal fixation system has good biomechanical properties, and it can reconstruct the stability of injured thoracolumbar spine.

OBJECTIVE: To evaluate the sensitization of the unique built-in expandable bio-coating anterior spinal fixation system.
METHODS: The extraction solution of the internal fixation system was taken as experimental group, the normal saline as negative control group, and 5% formaldehyde as positive control group. Intradermal injection induction, local induction and excitation test were carried out according to the sensitization test at the maximal dosage of GB/T16886.10-2005 Biological Evaluation of Medical Devices-Part 10: Tests for Irritation and Delayed-Type Hypersensitivity. Patch was removed after 24 hours and 48 hours, and the skin conditions of the animals in each group were observed and classified according to the Magnusson and Kligman levels. Skin tissues were performed with biopsy and inflammatory observation under microscope at 72 hours after patch removal.

RESULTS AND CONCLUSION: First of all, there was no erythema or edema in the experimental group and negative control group at 24 and 48 hours after removal of the patch. The Magnusson and Kligman levels were 0. However, there were moderate erythema or severe erythema and edema in the positive control group, and some scabs appeared. The Magnusson and Kligman levels were 2-3. Secondly, the experimental group and negative control group showed no stimulate neutrophils, lymphocytes and other inflammatory cells in the abdominal skin of guinea pigs, and there was no obvious hyperemia and edema. The inflammation grade was I. In the positive control group, however, inflammatory cells infiltrated by neutrophils or lymphocytes were seen in the skin tissues at the ventral part of guinea pigs, with an inflammatory grade of II-IV. All the findings reveal that the all built-in expansible bio-coating anterior spinal fixation system did not cause sensitization, which accorded with the requirement of implants in the delayed hypersensitivity test.

Key words: Internal Fixators, Hydroxyapatites, Guinea Pigs, Immunization, Tissue Engineering

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