3D打印制备生物材料耳廓支架的溶血反应对比研究
2021-09-11吴迪韩星钟自玲郑少川瞿申红
吴迪 韩星 钟自玲 郑少川 瞿申红



摘要:目的:讨论并分析3D打印聚己内酯(polycaprolactone ,PCL)和聚醚醚酮(Polyetheretherketone,PEEK)耳廓支架的溶血率,对比评价两种生物材料的溶血性能。方法:通过3D建模设计聚己内酯和聚醚醚酮的支架数据,利用熔融沉积法(FDM)打印出制备浸提液所需的材料支架,分别测定了聚己内酯和聚醚醚酮的细胞溶血率。溶血实验:将浸提液、生理盐水、蒸馏水分别加入兔抗凝血,测定溶血率。結果:聚己内酯和聚醚醚酮材料支架溶血率的平均值分别为2.51%和4.32%,说明聚己内酯材料和聚醚醚酮材料均无明显溶血反应(低于国家标准(5%)),而聚己内酯的溶血率小于聚醚醚酮的溶血率 , 对比两种材料结果可知PCL与PEEK在溶血率的比较上有统计学差异(t=-15.034,P<0.05),表明聚已内酯相比聚醚醚酮具有更好的生物相容性。
关键词:聚己内酯;聚醚醚酮;溶血反应;耳廓畸形;3D打印耳廓支架
Abstract:Objective: To discuss and analyze the hemolysis rate of 3D printed PCL (polycaprolactone)and PEEK(Polyetheretherketone) auricle stents, and to evaluate the hemolysis performance of the two biomaterials. Methods: the data of PCL and PEEK scaffolds were designed by 3D modeling, and the material scaffolds needed to prepare the extract were printed by FDM (Fused Deposition Modelling). Hemolysis test: the extract, normal saline and distilled water were added to rabbit anticoagulant respectively to determine the hemolysis rate. Results: the average hemolysis rate of PCL and PEEK scaffolds was 2.51% and 4.32% respectively, which indicated that PCL and PEEK scaffolds had no obvious hemolysis reaction (lower than the national standard (5%), but the hemolysis rate of PCL was lower than that of PEEK, Comparing the results of the two materials, PCL and PEEK had significant difference in hemolysis rate (t = - 15.034, P < 0.05), indicating that PCL had better biocompatibility than PEEK.
key words: Polycaprolactone, Polyetheretherketone, hemolytic reaction, auricle deformity, 3D Printing ,auricle stent
【中图分类号】R4 【文献标识码】A 【文章编号】1673-9026(2021)09-095-03
引言
耳廓由弹性软骨支架和被覆皮肤及其附属物组成的解剖复杂的三维结构,因此耳廓再造手术是重建外科中技术上极具挑战性的手术之一[1]。目前耳廓再造主要以手术为主,其中异体支架植入被广泛关注[1]。由于3D打印能利用医学数据(如CT或MRI数据)定制出针对不同患者的个性化和复杂的结构而被广泛应用于医学领域,同时随着3D打印技术的不断成熟和制造复杂结构方面的进步,对打印材料的要求也更加苛刻[3]。其中聚己内酯(PCL)和聚醚醚酮(PEEK)凭借着良好的生物学性能在耳廓畸形再造领域有着巨大的应用潜力[4, 5]。
PCL和PEEK作为一种新兴起的植入材料,植入患者体内会直接与体内组织直接接触,因此评价材料的生物相容性尤为重要。……
