骨碎补/聚乳酸-羟基乙酸共聚物微囊复合自固化磷酸钙治疗家兔股骨缺损模型的实验研究

目的 探讨骨碎补/聚乳酸-羟基乙酸共聚物(DR-PLGA)微囊与自固化磷酸钙人工骨(CPC)复合物对家兔股骨骨缺损的影响.方法 将8只新西兰大白兔数字随机分为实验组(n=4)和对照组(n=4),制备家兔股骨骨缺损模型,分别植入DR-PLGA/CPC复合体与不含骨碎补的PLGA/CPC骨支架,分别于术后4周、8周通过X线、大体解剖、组织学观察评价其提高成骨活性、促进骨折愈合的效果.结果 术后4周、8周X线及组织学观察显示实验组促进骨愈合、提高成骨活性均优于对照组.结论 DR-PLGA/CPC复合体可诱导新生骨形成,促进骨愈合.

Experimental research about the copolymers of DR-PLGA microcapsule and CPC on the treatment of rabbit femoral defect model

Objective To study the effects about rhizoma drynariae poly (lactic-co-glycolic acid) (DR-PLGA) /Calcium phosphate cement (CPC) composite scaffold on treating rabbit femoral bone defect.Methods Eight Newzealand rabbits were randomly divided into experiment group(n =4) and control group (n =4).The preparation of rabbit femoral bone defect model,separately implanted DR-PLGA/CPC scaffold and PLGA/CPC scaffold.After 4,8 weeks,we took out the materials,observed with X-ray,gross anatomy,histology observation to evaluate the osteogenetic activity,the effect of accelerating the healing of bone defect.Resuits At the 4th week and 8th week after implantation,the effect of promoting fracture healing and osteogenic activity of the experiment group were greater than those in the control group.Conclusions DR-PLGA combined with CPC could induce new bone formation,promote the healing of rabbit femoral defect.