【摘要】 背景:羊膜独有的结构可阻止某些物质通过,能保证包裹内组织正常营养供应,而且具有抗粘连、组织相容性好、炎性反应轻、纤维包裹少及可降解等特性。目的:比较新鲜羊膜及脱细胞羊膜修复腱鞘缺损,预防肌腱粘连和促进肌腱愈合的作用。方法:取60只雄性来亨鸡,制作双足第三足趾制备肌腱及腱鞘损伤模型,随机分为3组修复,新鲜羊膜组采用新鲜人羊膜修复腱鞘缺损,脱细胞羊膜组采用人脱细胞羊膜修复腱鞘缺损,对照组不做腱鞘修复。修复后进行第三足趾组织学观察及生物力学测试。结果与结论:①组织学观察:修复后2周,3组均存在充血水肿及炎症反应,新鲜羊膜组最轻,对照组最严重,3组水肿及炎症反应随时间延长逐渐减轻。修复12周,各组假鞘较修复后4周明显成熟,新鲜羊膜组及脱细胞羊膜组假鞘表面细胞致密层状排列整齐,表面光滑;对照组假鞘表面细胞排列紊乱,结构松散,可见表面纤维组织突出假鞘表面;②生物力学测试:脱细胞羊膜组、新鲜羊膜组修复后4,8,12周的肌腱滑动距离均大于对照组(P<0.05),前2组间比较差异无显著性意义;脱细胞羊膜组、新鲜羊膜组修复后4,8周的肌腱最大拉伸断裂强度高于对照组(P<0.05),且新鲜羊膜组高于脱细胞羊膜组(P<0.05),3组修复后12周的肌腱最大拉伸断裂强度无差异;③结果表明:新鲜羊膜和脱细胞羊膜均可用于重建腱鞘缺损,预防肌腱粘连,新鲜羊膜在促进早期肌腱愈合方面优于脱细胞羊膜。更多还原

【Abstract】 BACKGROUND: Amniotic membrane has a unique structure that can block the penetration of certain substances, to ensure normal nutrition supply for the surrounded tissues, and is also characterized by anti-adhesion, good tissue compatibility, mild inflammatory reaction, few fibers and biodegradability.OBJECTIVE: To compare the effects of fresh amniotic membrane and acellular amniotic membrane to prevent adhesion and promote tendon healing during the repair of tendon sheath defects. METHODS: Sixty healthy male leghorn chickens were selected, and the model of tendon injury and tendon sheath defects was established at the third toes. The animal models were then randomly divided into three groups and underwent repair with fresh amniotic membrane(group A), acellular amniotic membrane(group B), and no treatment in control group(group C), respectively. Histological observation and biomechanical analysis of the third toes were performed after repair. RESULTS AND CONCLUSION:(1) Histological observation. Congestive edema and inflammatory response were found in all animals at 2 weeks after repair, but mildest in the group A and severest in the group C. These inflammatory responses gradually alleviated over time in the three groups. At 12 weeks after repair, the new tendon sheath formed in all the animals, which was more mature than that at 4 weeks after repair. The synovial cells on the surface of the tendon sheath were arrayed tidily with dense structure in the groups A and B, but in the group C, the synovial cells were distributed disorderly with loose structure and prominent fibrous tissues.(2) Biomechanical analysis. Tendon sliding distance in the groups A and B was significantly larger than that in the group C at 4, 8, 12 weeks after repair(P < 0.05), but there were no significant difference in the distance between the groups A and B(P > 0.05). At 4 and 8 weeks after repair, the maximum tensile strength was largest in the group A, sequentially followed by group B and group C(P < 0.05), but there were no significant difference among the three groups at 12 weeks after repair(P > 0.05). To conclude, both fresh amniotic membrane and acellular amniotic membrane can promote tendon healing and prevent the adhesion of tendon through tendon sheath reconstruction, but the fresh amniotic membrane is preferred to promote early tendon healing compared with acellular amniotic membrane.更多还原