中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (29): 5296-5302.doi: 10.3969/j.issn.2095-4344.2013.29.006

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

锌离子改善骨质疏松状态下钛植入体的稳定性

林 威1,李旭东2,唐贶昀1,胡 静1   

  1. 1四川大学华西口腔医院颌面外科,口腔疾病研究国家重点实验室,四川省成都市  610041;2浙江大学医学院附属邵逸夫医院下沙院区口腔科,浙江省杭州市  310018
  • 收稿日期:2012-12-15 修回日期:2013-01-08 出版日期:2013-07-22 发布日期:2013-07-22
  • 通讯作者: 胡静,教授,四川大学华西口腔医院正颌及关节外科,四川省成都市 610041 drhu@vip.sohu.com
  • 作者简介:林威☆,男,1986年生,四川省邛崃市人,汉族,四川大学在读博士,主要从事骨内植入体研究。15982193296@163.com
  • 基金资助:

    国家自然科学基金项目(81070869)

Zinc ions improve the stability of titanium implants under the condition of osteoporosis

Lin Wei1, Li Xu-dong2, Tang Kuang-yun1, Hu Jing1   

  1. 1Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, Sichuan Province, China; 2Department of Stomatology, Xiasha Hospital, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310018, Zhejiang Province, China
  • Received:2012-12-15 Revised:2013-01-08 Online:2013-07-22 Published:2013-07-22
  • Contact: Hu Jing, Professor, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, Sichuan Province, China drhu@vip.sohu.com
  • About author:Lin Wei☆, Studying for doctorate, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, Sichuan Province, China 15982193296@163.com
  • Supported by:

    the National Natural Science Foundation of China, No. 81070869*

摘要:

背景:有研究表明,锌可通过调节成骨细胞活性起到改善骨质疏松状态下骨对钛植入体反应的作用。
目的:观察锌离子对改善骨质疏松状态下钛植入体稳定性的作用。
方法:摘除28只雌性SD大鼠卵巢,饲养12周获得骨质疏松效果,后随机分为2组,实验组于双侧股骨干骺端植入含锌羟基磷灰石涂层的钛植入体,对照组于双侧股骨干骺端植入羟基磷灰石涂层钛植入体。两组分别随机选择3只大鼠进行双重荧光标记,于术后6周末计算矿物沉积率;术后12周末,两组分别随机选择4只大鼠进行植入体及其周围组织组织形态学分析;术后12周,对两组剩余大鼠行推出实验,计算最大推出力与最大剪切力。
结果与结论:荧光标记检测发现在术后3-5周,两组中植入体周围均有活跃的骨生成,实验组矿物质沉降率显著高于对照组(P < 0.05)。两组中均可见新骨形成,但实验组新骨形成量、骨面积比率、骨-植入体接触率、最大推出力及最大剪切力均优于对照组(P < 0.05或P < 0.01)。表明锌离子在去势大鼠骨植入体中具有促进骨生成和改善植入体稳定性的作用。

关键词: 生物材料, 组织工程口腔材料, 锌离子, 钛植入体, 骨整合, 骨质疏松, SD大鼠, 国家自然科学基金

Abstract:

BACKGROUND: Zinc can improve bone reaction to titanium implants through regulation of osteoblast activity under the condition of osteoporosis.
OBJECTIVE: To study the zinc ions effect on improving the stability of titanium implants under the condition of osteoporosis.
METHODS: After removal of the ovary, 28 female Sprague-Dawley rats presented with osteoporosis symptoms for 12 weeks and then, they were randomly divided into two groups. Two kinds of titanium implants with (experimental group) or without zinc (control group) were inserted into the bilateral femoral metaphysis longitudinally in the ovariectomized rats, separately. Three rats were selected from each group for double fluorescence labeling examination. Mineral apposition rate was calculated at postoperatively 6 weeks. Another four rats were selected from each group for histomorphometry analysis at postoperatively 12 weeks. Biomechanical test was in the remaining rats in the two groups to calculate the maximum push-out force and maximum shear force at 12 weeks postoperatively.
RESULTS AND CONCLUSION: The double fluorescence labeling examination revealed that the mineral apposition rate was improved in the experimental group as compared with the control group (P < 0.05). New bone formation occurred in the two groups. However, larger new bone amount, higher bone area ratio and bone-to-implant contact were detected in the experimental group (P < 0.05 or P < 0.01). The maximum push-out force and maximum shear force were also superior in the experimental group to the control group (P < 0.05 or P < 0.01). These findings indicate that zinc ions are capable of promoting bone formation and improving implant fixation in ovariectomized rats.

Key words: biomaterials, tissue-engineered oral materials, zinc ions, titanium implants, osseointegration, osteoporosis, Sprague-Dawley rats, National Natural Science Foundation of China

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