中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (16): 2557-2562.doi: 10.3969/j.issn.2095-4344.2014.16.016

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

纳米羟基磷灰石/聚己内酯电纺支架修复种植体周围骨缺损

李家锋1,崔 群2,孙秀英2,许 蕾2,孙晋虎1,韩建国2   

  1. 1徐州医学院附属医院口腔颌面外科,江苏省徐州市 221002;2徐州医学院口腔医学院,江苏省徐州市 221004
  • 修回日期:2014-02-06 出版日期:2014-04-16 发布日期:2014-04-16
  • 通讯作者: 李家锋,徐州医学院附属医院口腔颌面外科,江苏省徐州市 221002
  • 作者简介:李家锋,男,1968年生,江苏省徐州市人,汉族,硕士生导师,主任医师,副教授,主要从事口腔颌面外科研究。
  • 基金资助:

    江苏省徐州市社会发展计划项目(XF10C027)

Nano-hydroxyapatite/polycaprolactone electrospinning scaffolds repair bone defects around the immediate implant

Li Jia-feng1, Cui Qun2, Sun Xiu-ying2, Xu Lei2, Sun Jin-hu1, Han Jian-guo2   

  1. 1Department of Oral Maxillofacial Surgery, Affiliated Xuzhou City Hospital of Xuzhou Medical College, Xuzhou 221002, Jiangsu Province, China; 2School of Stomatology, Xuzhou Medical College, Xuzhou 221004, Jiangsu Province, China
  • Revised:2014-02-06 Online:2014-04-16 Published:2014-04-16
  • Contact: Li Jia-feng, Department of Oral Maxillofacial Surgery, Affiliated Xuzhou City Hospital of Xuzhou Medical College, Xuzhou 221002, Jiangsu Province, China
  • About author:Li Jia-feng, Master’s supervisor, Chief physician, Associate professor, Department of Oral Maxillofacial Surgery, Affiliated Xuzhou City Hospital of Xuzhou Medical College, Xuzhou 221002, Jiangsu Province, China
  • Supported by:

    the Social Development Plan of Xuzhou City, No. XF10C027

摘要:

背景:牙齿缺失导致牙槽嵴骨质的改建和持续吸收,严重影响种植体植入的条件和种植区软硬组织的美观。

目的:评价纳米羟基磷灰石/聚己内酯电纺支架促进即刻种植体周围骨缺损的成骨效果。
方法:制作犬骨髓间充质干细胞复合纳米羟基磷灰石/聚己内酯电纺支架的组织工程化骨。拔除6只实验犬双侧下颌第二前磨牙,在其近中根牙槽窝处制备种植床,即刻植入种植体,在钛钉颊侧制作三壁骨缺损,两侧骨缺损处分别植入组织工程化骨与Bio-Oss小牛无机骨粉,并在材料表面覆盖Bio-Gide胶原膜。术后即刻、4周、8周、12周X射线测量种植体周围骨灰度值;12周后完整取出下颌骨,甲苯胺蓝染色观察骨缺损区的微观结构,新生骨量、形态结构及种植体-骨结合情况。
结果与结论:两组间术后各时间点骨密度变化无明显差异,表明两组材料在促进骨再生过程中的成骨效果基本一致。组织工程化骨组骨缺损区内形成致密板状骨,可见成熟骨细胞,哈弗氏管,新生骨-种植体结合较紧密;Bio-Oss小牛无机骨粉组板层骨致密,新骨中有少量Bio-Oss颗粒分布,成骨细胞较组织工程化骨组少,部分哈弗管结构内可见到毛细血管,新骨与植入材料之间形成桥形连接,与种植体结合紧密。表明纳米羟基磷灰石/聚己内酯支架复合骨髓间充质干细胞、Bio-Gide胶原膜可促进种植体周围牙槽骨再生。

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

关键词: 生物材料, 口腔生物材料, 即刻种植, 骨缺损, 纳米羟基磷灰石/聚己内酯支架, 骨髓间充质干细胞, 组织工程骨, 引导再生术

Abstract:

 BACKGROUND: Alveolar bone remodeling and sustained absorption due to tooth extraction seriously affect the implanting conditions and morphology of hard and soft tissue in implant zone.

OBJECTIVE: To evaluate the effect of nano-hydroxyapatite/polycaprolactone electrospinning scaffolds to improve the osteogenic effect of bone defects around immediate implants.
METHODS: Tissue-engineered bone was prepared by combining canine bone marrow mesenchymal stem cells with nano-hydroxyapatite/polycaprolactone electrospinning scaffold. Bilateral mandibular second premolars from six dogs were extracted mandibular second premolar, and an immediate implant was placed in the mesial fossa of the mandibular second premolar. Three-wall bone defects was made buccally using titanium nails, then tissue-engineered bone and Bio-Oss bone powders were implanted bilaterally covered by collagen membranes (Bio-Gide). Imageology examination was performed to measure bone gray levels immediately, 4, 8, 12 weeks after surgery. After 12 weeks, the mandible was removed completely, toluidine blue staining was used for observation of microstructure, new bone formation, bone morphology and implant osseointegration.
RESULTS AND CONCLUSION: Between the two groups, there was no difference in bone mineral density at each time point after surgery, indicating that the effects of the two materials to promote bone regeneration process are basically the same. After implantation, the dense lamellar bone formed in the bone defect region of tissue-engineered bone group, mature bone cells, Haversian canal, and implant osseointegration were visible. While, in the Bio-Oss group, the lamellar bone was dense, a small amount of Bio-Oss particles distributed within new bone tissues, fewer bone cells were found, a part of Haversian canal was shown to have blood capillaries, and new bone was in close conjunction with the implant. These findings indicate that the nano-hydroxyapatite/polycaprolactone electrospinning scaffold combined with bone marrow mesenchymal stem cells and Bio-Gide collagen membrane can promote the regeneration of alveolar bone around the implant.

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words:  biocompatible materials, dental implants, hydroxyapatites, nanoparticles

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