PHBV复合HA纳米纤维材料修复兔桡骨缺损的实验研究

目的:探讨羟基丁酸-羟基戊酸共聚物复合羟基磷灰石(PHBV/HA)的纳米纤维材料修复骨缺损的能力。方法:将40只新西兰兔制备单侧桡骨中段10 mm的骨缺损模型,随机分为3组:实验组植入PHBV/HA的纳米纤维材料,对照组植入硫酸钙人工骨,各16只;空白对照组8只。在术后相应时间段分别进行大体观察,行放射学、组织学及扫描电镜检查,进行生物力学测试,观察其成骨能力、生物降解性、生物相容性等指标。结果:实验组术后4～8周植入材料处有片状密度增强,截骨处有骨痂向缺损区生长,骨皮质不连续,仍有骨性缺损,术后12～16周新生皮质骨与宿主皮质骨自然连接,骨缺损已完全修复。新生骨显示出正常骨干结构,髓腔再通。与对照组相比,8周之前在新生骨的形成及修复骨缺损方面的作用相差不多,差异无统计学意义(P>0.05),而到12周之后与对照组相比,实验组体现了更好的成骨能力,差异有统计学意义(P<0.05)。结论:PH-BV/HA的纳米纤维材料具有良好的生物相容性及骨传导性,是一种良好的修复骨缺损的植入材料。

Study of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/hydroxylapatite composite nanofibers for repairing rabbit radial defect

Objective: To investigate the capability of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/hydroxylapatite(PHBV/HA) composite nanofibers for healing bone defect.Methods:Forty New Zealand white rabbits were used to induce 10 mm radius segmental defects,then randomized into 3 groups.PHBV/HA composite nanofibers were implanted into the 16 rabbits radial defects as experiment group,calcium sulfate bone graft substitutes were implanted into the 16 rabbits radial defects as control group,nothing was implanted into ...