口腔医学研究 ›› 2021, Vol. 37 ›› Issue (4): 366-370.DOI: 10.13701/j.cnki.kqyxyj.2021.04.019

• 口腔材料学研究 • 上一篇    下一篇

仿生微/纳米多级界面增强植入体骨整合的体内研究

时子文, 祝颂松, 姜楠*   

  1. 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心四川大学华西口腔医院正颌及关节外科 四川 成都 610041
  • 收稿日期:2020-09-21 发布日期:2021-04-15
  • 通讯作者: *姜楠,E-mail:dent_jn@163.com
  • 作者简介:时子文(1995~ ),女,山东烟台人,硕士在读,主要从事口腔正颌及关节外科。
  • 基金资助:
    国家自然科学基金(编号:81901026)

Development of Biomimetic Micro/Nano Hierarchical Interface for Enhancement of Osseointegration

SHI Ziwen, ZHU Songsong, JIANG Nan*   

  1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthognathic and Temporomandibular Joint Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2020-09-21 Published:2021-04-15

摘要: 目的: 研究一种仿生微/纳米多级界面以增强植入体骨整合。方法: 纯钛样本分别经放电等离子烧结、电化学阳极氧化或二者复合处理后,分别形成微米级骨小梁仿生结构、TiO2纳米管表面改性结构、微米级骨小梁仿生/TiO2纳米管表面改性结构。取40只雌性SD大鼠随机分为4组(A、B、C、D,n=10),在其膝关节内侧建立直径为1.5 mm的骨缺损模型,分别植入未处理钛、微米级骨小梁仿生钛、TiO2纳米管表面改性钛、微米级骨小梁仿生/TiO2纳米管表面改性钛。12周后,对近端胫骨及钛植入体行组织学分析、Micro-CT评价及生物力学测试。结果: D组骨整合率,相对骨体积和骨体积最高,多项骨小梁相关参数较高,表现出更好的骨整合。此外,D组的最大推出力和临界抗剪切强度均高于其他3组(P<0.05)。结论: 仿生微/纳米多级界面增强了钛植入体的骨整合,可作为一种性能优良的材料用于临床治疗。

关键词: 微/纳米多级界面, 骨整合, 植入体, TiO2纳米管, 复合处理

Abstract: Objective: To investigate a biomimetic micro/nano hierarchical interface to enhance osseointegration. Methods: The pure titanium samples were modified by three surface treatment methods, namely spark plasma sintering, electrochemical anodization, and composite treatment, which formed Micro-Ti, Nano-Ti and Micro/Nano-Ti structure, respectively. Forty female SD rats were randomly assigned into four groups (Group A, B, C, and D, n=10 animals per group). Bone defects in the diameter of 1.5mm were established on the medial side of the knee joint and inserted with untreated-Ti, Micro-Ti, Nano-Ti, and Micro/Nano-Ti, respectively. Twelve weeks following implantation, the rats were sacrificed and the proximal tibiaes (together with the titanium implants) were harvested for histological analysis, Micro-CT evaluation, and biomechanical testing. Results: Group D had the highest percent of osseointegration, percent bone volume, and bone volume. Multiple relative parameters of trabeculae of group D were relatively high. The compression force and ultimate shear strength of group D were significantly higher than those of the other three groups (P<0.05). Conclusion: Biomimetic micro/nano hierarchical interface enhanced the osseointegration of titanium implants.

Key words: micro/nano hierarchical interface, osseointegration, implants, titania nanotubes, composite treatment