中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (38): 5642-5649.doi: 10.3969/j.issn.2095-4344.2016.38.003

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

羟基磷灰石涂层改善骨内植物界面促进骨整合

秦  杰1,赵  波1,王  栋1,董  军1,李浩鹏1,郭  磊1,王  爽2,贺西京1
  

  1. 1西安交通大学第二附属医院骨科,陕西省西安市710004;2西北大学光子学与光子技术研究所,陕西省西安市  710069
  • 收稿日期:2015-06-28 出版日期:2016-09-16 发布日期:2016-09-16
  • 通讯作者: 贺西京,主任医师,教授,博士生导师,西安交通大学第二附属医院骨科,陕西省西安市 710004
  • 作者简介:秦杰,男,1985年生,陕西省汉中市人,汉族,2014年西安交通大学毕业,博士,主治医师/助理研究员,主要从事人工关节研制,脊髓损伤研究。
  • 基金资助:
    2015年陕西省留学人员科技活动择优资助项目优秀类(非融合人工颈椎系统的研制);国家自然科学基金青年项目(81401018,11404258)

Hydroxyapatite biocoating improves bone-implant interface and promotes osseointegration

Qin Jie1, Zhao Bo1, Wang Dong1, Dong Jun1, Li Hao-peng1, Guo Lei1, Wang Shuang2, He Xi-jing1
  

  1. 1Department of Orthopedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, Shaanxi Province, China; 2Institute of Photonics and Photon Technology, Northwest University, Xi’an 710069, Shaanxi Province, China
  • Received:2015-06-28 Online:2016-09-16 Published:2016-09-16
  • Contact: He Xi-jing, Chief physician, Professor, Doctoral supervisor, Department of Orthopedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, Shaanxi Province, China
  • About author:Qin Jie, Ph.D., Attending physician, Research assistant, Department of Orthopedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, Shaanxi Province, China
  • Supported by:
    Preferential FInancing of Science and Technology Activities in Returned Overseas Graduates in Shaanxi Province in 2015; the National Natural Science Foundation of China, No. 81401018, 11404258

摘要:

文章快速阅读:

 

文题释义:
羟基磷灰石
:是哺乳类骨和牙齿的一种主要无机物成分,具有优秀的生物相容性和较高骨诱导性,常被用来作为表面包被复合物。羟基磷灰石在体内可以分解出钙和磷离子,可在骨内植物界面被局部组织吸收并诱导生长出新的骨组织。研究表明,羟基磷灰石具有促进骨内植物接触和内置物表面骨量的增加,以及在骨内植物界面减少软组织干扰的潜能。
微弧氧化技术:是一种在不含铁的金属表面内生一种氧化陶瓷层的技术。钛合金在微弧氧化处理后在抗磨损和抗腐蚀特性上都被改进,至于生物医学应用,微弧氧化过程中钙离子和磷酸根离子在电解液中以非结晶的形式存在,并且能够进入陶瓷层,使得钛合金的生物潜能显著增加。


背景:课题组设计并制造出合并颈椎融合器和人工颈椎间盘双重功能的人工颈椎及椎间连接体,以及具有羟基磷灰石涂层的人工颈椎及椎间连接体。
目的:评估此关节系统的生物力学性能及羟基磷灰石涂层在促进骨整合和长期稳定性中的作用。
方法:将24只山羊随机分为3组,空白对照组不干预,实验1组行颈椎前路C 2/3、C 3/4椎间盘摘除,C3椎体次全切,然后行人工颈椎及椎间连接体置换;实验2组行颈椎前路C 2/3、C 3/4椎间盘摘除,C3椎体次全切,然后行具有羟基磷灰石涂层人工颈椎及椎间连接体的置换。术后12周,采集C 1-5标本进行生物力学测试及组织学染色。
结果与结论:①疲劳实验前,实验1组、实验2组前屈后伸和左右侧屈方向的运动范围、中性区与空白对照组无差异,轴向旋转方向的运动范围、中性区高于空白对照组(P < 0.05),前屈后伸、左右侧屈和轴向旋转方向的刚度均低于空白对照组(P < 0.05);实验1组与实验2组各方向的运动范围与刚度均无差异;疲劳实验后的结果与疲劳实验前相似;②组织学观察显示,两种假体均有良好的生物相容性和耐磨性,在具有羟基磷灰石涂层人工颈椎及椎间连接体表面有更多的新骨生成;③结果表明,人工颈椎及椎间连接体可很好地重建颈椎运动功能,羟基磷灰石涂层可显著改善骨内植物界面,促进骨整合。
ORCID: 0000-0002-0465-5376(贺西京)

关键词: 生物材料, 骨生物材料, 颈椎间盘置换, 羟基磷灰石, 颈椎退行性疾病, 颈椎前路减压融合, 动物模型, 微弧氧化技术, 生物力学, 国家自然科学基金

Abstract:

BACKGROUND: We have designed and manufactured a novel artificial cervical vertebra and intervertebral complex (ACVC) which combines the cervical titanium cage with the artificial cervical disc, and also developed the ACVC with a hydroxyapatite biocoating (ACVC-HA).
OBJECTIVE: To evaluate biomechanical properties of the joint system, and the role of HA coating in promoting osseointegration and long-term stability.
METHODS: Twenty-four goats were randomly divided into three groups and underwent the anterior C 2/3 and C 3/4 discectomy, and C3 subtotal corpectomy, followed by ACVC implantation (group 1) and ACVC-HA implantation (group 2), and given no intervention (black control group), respectively. group. At 12 weeks after surgery, C 1-5 samples were collected to undergo biomechanical tests and histological staining.
RESULTS AND CONCLUSION: Prior to the fatigue test, compared with the blank control group, the range of motion and neural zone of groups 1 and 2 in the directions of flexion-extension and lateral bending showed no significant differences, but the above indicators were significantly increased in the direction of rotation (P < 0.05). Additionally, the stiffness in all three directions was significantly lower than that in the blank control group (P < 0.05). There were no significant differences in the range of motion and neural zone in all directions between groups 1 and 2. Similar results were found after the fatigue test. The histological staining showed that both two implants had good biocompatibility and abradability, but more new bone formed on the ACVC-HA. These results suggest that ACVC can effectively reconstruct the motor function of the cervical spine after decompression. Furthermore, HA coating can markedly improve bone-implant interface to promote osseointegration.

Key words: Arthroplasty, Replacement, Hydroxyapatites, Spinal Fusion, Tissue Engineering

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