骨髓基质细胞复合多孔矿化Bio-Oss骨胶原移植修复下颌骨缺损的实验研究

Repair of mandibular defect with bone marrow stroma cell transplantation combined with multi-pore mineralization ossein

目的:探讨以多孔矿化Bio-Oss骨胶原为载体的自体骨髓基质细胞移植修复下颌骨缺损的效果.方法:标准成年新西兰白兔16 只随机分2 组,一组抽取骨髓基质细胞进行培养,矿化诱导后,细胞悬液与凝胶混匀滴入Bio-Oss胶原骨块中, 静置于37℃,50 ml/L的CO2培养箱中温育4～6 h,加入DMEM成骨条件培养液培养.然后修复下颌骨极限骨缺损.另组单纯Bio-Oss胶原块,修复下颌骨极限骨缺损.分别于术后8 周和12 周取材,分别行大体、X射线、组织学观察骨缺损的修复情况.结果:术后12 周,(1)BMSC+凝胶+Bio-Oss胶原组,基本上由新生骨组织所修复.(2)单纯Bio-Oss胶原组大部分由纤维组织填充,周围骨形成明显,中央少量骨痂形成.结论:(1)Bio-Oss骨胶原有较强的诱导成骨能力;(2)Bio-Oss骨胶原为载体的自体骨髓基质细胞移植能有效修复骨缺损,是骨组织工程良好的支架材料.

Objective:To study the effect of bone marrow stroma cell( BM SC) transplantation combined with multi-pore mineralization ossein(Bio-Oss) in the plerosis of mandibular defect.Methods:A round whole-layer defect in the diameter of 1.5 cm was created on each side of mandible in 16 whit e New Zealand rabbits.The rabbits were randomly divided into two groups.In group 1 BMSCs were collected and cultured with mineralization induce medium for 2 wee ks. Then cell suspension at the density of 5×10 7 /ml and gelatum were mixed a nd dripped into Bio-Oss bones, incubated in DMEM in 50 ml/L CO 2 incuba tor at 37 ℃ for 4-6 h.The BMSC-Bio-Oss was applied to make plerosis of the m andibular defects.In group 2 the defects were repaired with the Bio-Oss ossein only.Samples were collected after 8 and 12 weeks after opreation respectively an d observed with radiology and histology.Results:12 weeks after o peration, (1)in group 1 previous defects were basically consisted of new bone tissue;(2)in group 2 the previous defects were mainly consisted of fibrous tis sue. Conculsions:BMSC-Bio-Oss transplantation may effectively repair bone defect.