中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (6): 829-835.doi: 10.3969/j.issn.2095-4344.2017.06.002

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

硫酸钙骨水泥与聚氨基酸/硫酸钙复合骨水泥修复山羊椎体骨缺损的对照

王贤帝,陈  果,李柱海,蒋虎山,聂鸿飞,谢天航,黄宏杰,裴福兴,宋跃明,曾建成
  

  1. 四川大学华西医院骨科,四川省成都市  610041
  • 收稿日期:2016-12-02 出版日期:2017-02-28 发布日期:2017-03-16
  • 通讯作者: 曾建成,副教授,四川大学华西医院骨科,四川省成都市 610041
  • 作者简介:王贤帝,男,1987年生,四川省成都市人,汉族,2014年四川大学华西临床医学中心毕业,硕士,医师,主要从事脊柱退变性疾病、肿瘤研究。
  • 基金资助:

    四川省科技厅科技支撑计划项目资助(2012SZ0128)

Calcium sulfate bone cement with or without injectable polyamino acid for goat vertebral defects: a comparative experiment

Wang Xian-di, Chen Guo, Li Zhu-hai, Jiang Hu-shan, Nie Hong-fei, Xie Tian-hang, Huang Hong-jie, Pei Fu-xing, Song Yue-ming, Zeng Jian-cheng
  

  1. Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan Province, China
  • Received:2016-12-02 Online:2017-02-28 Published:2017-03-16
  • Contact: Zeng Jian-cheng, Associate professor, Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan Province, China
  • About author:Wang Xian-di, Master, Physician, Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan Province, China
  • Supported by:

    the Science and Technology Program of the Science & Technology Department of Sichuan Province, No. 2012SZ0128

摘要:

文章快速阅读:

 

文题释义:
骨形态计量学参数
:是基于Micro-CT测算得出,可客观反映骨缺损在填充不同材料修复后,新生骨小梁的生长变化特点,直观反映填充材料的吸收降解状况。可在不破坏标本外观的情况下,对其内部结构进行观察研究。Micro-CT还可对活体小动物骨骼进行扫描,测算骨形态计量学参数,在内分泌、代谢性疾病等研究领域亦有重要价值。
可吸收骨水泥:目前在临床上成熟应用的聚甲基丙烯酸甲酯骨水泥为有机高分子材料,在体内不可吸收,多用于老年骨质疏松压缩骨折的椎体强化、老年患者骨水泥型关节假体置换及骨肿瘤病灶的填充。由于其不可吸收,在体内长期存留可产生松动移位。同时,聚甲基丙烯酸甲酯骨水泥本身可对骨小梁新生产生阻挡。可吸收骨水泥自身可降解,诱导新骨形成,是骨缺损生物修复的理想方式,故可吸收骨水泥成为近年来的研究热点。

背景:新近合成的可注射聚氨基酸/硫酸钙复合骨水泥在前期实验中表现出了良好的安全性与生物相容性。目前尚无该材料运用于脊柱骨缺损修复方面的报道。
目的:评价聚氨基酸/硫酸钙复合骨水泥修复椎体骨缺损后的吸收降解及新骨生成特点。
方法:选取12只健康成年雌性山羊,经腰椎右侧椎弓根制造φ4 mm×15 mm椎体骨缺损后,随机将每只山羊的腰椎分为2组,分别用可注射硫酸钙骨水泥、可注射聚氨基酸/硫酸钙骨水泥填充修复。术后4,8,12,16周处死实验动物,进行Micro-CT扫描及定量分析及硬组织切片观察。
结果与结论:①两组各时间点均有新生骨小梁长入骨缺损区域。骨小梁沿骨缺损边缘向中心生长;②第4周末时,两组骨缺损内均未见填充材料,骨缺损清晰可见;③16周末时,硫酸钙组骨缺损尚剩余不规则腔隙,新生骨小梁较密,排列欠规则。聚氨基酸/硫酸钙组新生骨小梁几乎将骨缺损完全充填,骨小梁结构清晰,连接良好;④骨组织形态计量学定量数据显示:随时间推移,两组的骨小梁相对体积、骨小梁厚度、骨小梁数量均呈现上升趋势,骨小梁分离度呈现下降趋势;⑤硬组织切片结果显示:16周末时,两组均有大量骨小梁生成,部分连接,大部分新生骨小梁已具有正常骨小梁结构;⑥结果表明,可注射聚氨基酸/硫酸钙复合骨水泥能在体内完全降解,在修复椎体骨缺损时表现出较单纯硫酸钙骨水泥有更好的成骨活性。以质量分数10%的比例添加聚氨基酸,并未显著减低该复合骨水泥修复椎体骨缺损后的吸收降解速度。

关键词: 生物材料, 骨生物材料, 聚氨基酸/硫酸钙骨水泥, 硫酸钙, 山羊, 椎体, Micro-CT, 组织学

Abstract:

BACKGROUND: Our previous study has proved that the novel injectable polyamino acid/calcium sulfate (PAA/CS) bone cement possesses a good safety and biocompatibility. But its repair effect on spinal defects is never reported.
OBJECTIVE: To evaluate the degradability and osteogenesis of the PAA/CS bone cement in vertebral repair.
METHODS: Twelve healthy adult female goats were selected. The vertebral defects of φ4 mm×15 mm were prepared through the right lumbar pedicle, and the vertebrae of each goat were then randomly divided into two groups (groups A and B), followed by filled with the injectable CS or PAA/CS, respectively. The goats were sacrificed at 4, 8, 12 and 16 weeks after surgery, and micro-CT scan, quantitative analysis and histological observation were conducted.
RESULTS AND CONCLUSION: New trabeculae grew in the defect area from the edging to the center in the two groups. At the end of 4 weeks, no filling material was found in the two groups, and the defect region was clear. At the end of 6 weeks, there was still an irregular cavity in the bone defect of the group A and the newly-formed trabeculae were dense and arranged disorderly. In the group B, the defect region was almost filled with trabeculae that were clear and connected well. With time, the bone volume fraction, thickness and number of trabeculae were on a rise, while the trabecular separation was in decline in both two groups. Histological observation showed that there were a large number of new trabeculae in both two groups, a part of which were connected, but most of which had the similar structures to normal trabeculae at the 16th week. These results suggest that the PAA/CS bone cement can be degraded thoroughly in vivo and has better osteogenesis than the CS. Addition of 10% PAA does not significantly delay the degradation of PAA/CS bone cement.

Key words: Calcium Sulfate, Kyphoplasty, Goats, Tissue Engineering

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