摘要
目的:观察第3代同质异体牙髓干细胞(dental pulp stem cell,DPSCs)定植于冠髓被摘除的大鼠髓腔后,再生修复牙髓牙本质复合体的能力。方法:18只SD大鼠随机分为实验组和对照组,两组均全麻下摘除大鼠上颌双侧第一磨牙冠髓,实验组同期髓腔定植体外培养的同质异体大鼠牙髓干细胞,对照组冠髓摘除后不进行任何处理,术后均使用光固化树脂充填封闭髓腔。两组动物均于术后2、4、6周处死,取其上颌骨进行大体观察,X线观察,组织学观察,牙本质的厚度测量。结果:实验组4周时,肉眼可见牙髓充血减少;6周时,X线显示牙本质厚度增加,根尖孔闭合;6周时,光镜下显示明显新生牙本质形成,成牙本质细胞栅栏状排列;牙本质厚度测量结果显示,实验组牙本质厚度2周时增厚,4周增厚更明显,持续至6周,优于对照组(P<0.05)。结论:牙髓干细胞髓腔内定植,可以促进牙髓牙本质复合体修复再生,具有潜在的临床应用价值。
Objective：To observe the potential of homogeneous dental pulp stem cells（DPSCs）to repair and regenerate pulp dentin complex when rat crown pulp is removal.Methods：Eighteen SD rats were randomly divided into experimental group and control group.The experimental group was transplanted allogeneic rats＇ DPSCs into the first molar＇s pulp cavity whose crown pulp was destructed.The control group was not treated after crown pulp was destructed.After2,4,6weeks,18 mice were sacrificed.Their upper jaw were investigated by general observation,X-ray,HE staining,and the thickness of dentin.Results：After 4weeks,the hyperemia of experimental group reduced.After 6weeks,X-ray could observe the dentin of experimental group was becoming thick and root apical foramen closed.After 6weeks,newborn dentin in experimental group obviously increased in light microscope and odontoblasts arranged palisade.The sample in experimental group showed that after 2 weeks,dentin was becoming thick,and 4weeks was more thick than it,continued to 6weeks.The experimental group was better than the control group.Conclusion：It had potential clinical application value that the pulp cavity as the place of dental pulp stem cells implanting could promote pulp-dentin complex＇s regeneration and repairing.
出处
《口腔医学研究》
CAS
CSCD
北大核心
2015年第7期645-648,共4页
Journal of Oral Science Research
基金
新疆维吾尔自治区自然科学基金资助项目(编号:2011211A067)
关键词
牙髓干细胞
牙髓牙本质复合体
再生
修复
Dental pulp stem cell Pulp-dentin complex Regeneration Repairing
