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中华口腔医学研究杂志(电子版) ›› 2012, Vol. 6 ›› Issue (04) : 336 -341. doi: 10.3877/cma.j.issn.1674-1366.2012.04.006

基础研究

个体化钛支架复合珊瑚羟基磷灰石和重组人骨形成蛋白2 修复兔下颌骨缺损
王忠东1, 陈俊兰1, 陈觉尧1, 胡文1, 龚振宇2, 刘亚雄3, 林少珍1, 吴纪楠1,()   
  1. 1.528400 中山市人民医院口腔医疗中心
    2.南京军区福州总医院
    3.西安交通大学
  • 收稿日期:2012-04-26 出版日期:2012-08-01
  • 通信作者: 吴纪楠
  • 基金资助:
    广东省科技计划(2008B030301291)中山市科技计划(20071A024)

The experimental study on the effect of repairing mandibular defects with CHA/rhBMP-2 by individualized titanium bracket

Zhong-dong WANG1, Jun-lan CHEN1, Jue-yao CHEN1, Wen HU1, Zhen-yu GONG1, Ya-xiong LIU1, Shao-Zhen LING1, Ji-nan WU1,()   

  1. 1.Dental Care Center, People's Hospital,Zhongshan 528400, China
  • Received:2012-04-26 Published:2012-08-01
  • Corresponding author: Ji-nan WU
引用本文:

王忠东, 陈俊兰, 陈觉尧, 胡文, 龚振宇, 刘亚雄, 林少珍, 吴纪楠. 个体化钛支架复合珊瑚羟基磷灰石和重组人骨形成蛋白2 修复兔下颌骨缺损[J/OL]. 中华口腔医学研究杂志(电子版), 2012, 6(04): 336-341.

Zhong-dong WANG, Jun-lan CHEN, Jue-yao CHEN, Wen HU, Zhen-yu GONG, Ya-xiong LIU, Shao-Zhen LING, Ji-nan WU. The experimental study on the effect of repairing mandibular defects with CHA/rhBMP-2 by individualized titanium bracket[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2012, 6(04): 336-341.

目的

通过观察个体化钛支架复合珊瑚羟基磷灰石(CHA)和重组人骨形成蛋白2(rhBMP-2)修复兔下颌骨缺损的实验效果,探讨下颌骨个体化修复再生的途径。

方法

以9 只新西兰大白兔为实验对象,采用磨骨术建立兔下颌骨单侧缺损模型,利用计算机辅助设计/制作、快速成型技术等设计制作兔下颌骨个体化钛修复体,再将其与CHA 和rhBMP-2 复合应用于兔下颌骨标准化缺损修复,通过大体标本观察、骨密度检测、生物力学测试和组织学染色对下颌骨缺损的个体化再生修复效果进行研究。

结果

兔下颌骨解剖形态恢复理想,生物力学测试、骨密度检测及组织学观察均显示随时间点延长成骨效果呈明显上升趋势(P<0.05),钛支架内具有大量新骨形成,新生骨组织在24 周时已明显成熟。

结论

采用快速成型技术制作的个体化钛支架复合CHA 和rhBMP-2,可望通过骨再生途径实现下颌骨缺损的个体化修复重建。

Objective

To study the effect of individualized titanium bracket combined with coralline hydroxyapatite (CHA) and recombinant human bone morphogenetic protein-2 (rhBMP-2) on bone defect repairing.

Methods

Radial critical size bone defect models were made on 9 rabbits,Individualized titanium bracket were obtained from CAD/CAM and RP. X-ray, histological examination,biomechanics analysis and immunohistochemical staining were made 4, 12, and 24 weeks post operation.

Results

The integrity of the mandible was ideally recovered. New bone formation was seen in both the X-ray observation and the histological examination (P<0.05). The best osseo-integrity can be observed at 24th week.

Conclusion

It is possible to obtain individualized functional reconstruction of mandibular segmental defect using individualized three-dimensional titanium bracket combined with CHA and rhBMP-2.

图1 制作完成的个体化纯钛假体
图2 CHA/rhBMP-2 复合骨修复骨缺损区
图3 个体化假体的植入
图4 24 周缺损区大体标本
表1 各时间点骨密度和生物力学统计结果(n=3,±s)
图5 术后各时间点组织学观察(HE × 200) A. 4 周; B. 12 周; C. 24 周
表2 各时间点Ⅰ型胶原及骨钙素的吸光度(A)值统计结果(n=3,±s)
图6 术后各时间点Ⅰ型胶原免疫组织学观察(IHC × 200) A. 4 周; B. 12 周; C. 24 周
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