聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架修复喉软骨缺损

背景：喉软骨缺损传统的修复方法受到供体来源、排斥反应等限制，因而难以推广。 目的：观察聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架修复喉软骨缺损的效果。 方法：将20只Wistar 大鼠随机分为聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架组和聚乳酸-乙醇酸共聚物支架组，建立喉软骨缺损模型后分别采用聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架和聚乳酸-乙醇酸共聚物支架修复。 结果与结论：聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架组大鼠造模后3，5，7 d时喉骨缺损直径显著小于聚乳酸-乙醇酸共聚物支架组；聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架组大鼠喉软骨缺损部位基本修复，表面平整，且与周围其他组织之间没有明显界限；而聚乳酸-乙醇酸共聚物支架组大鼠喉软骨缺损部位存在凹陷，表面粗糙，和周围组织存在明显界限。说明聚乳酸-乙醇酸共聚物/羟基磷灰石复合支架能够促进喉软骨缺损部位修复，修复喉软骨缺损的效果更理想。  中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold repairs laryngeal cartilage defect

BACKGROUND: The traditional repair methods for laryngeal cartilage defect are restricted by donor source, rejection, which are difficult to be popularized. OBJECTIVE: To investigate the effect of polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold in repair of laryngeal cartilage defect. METHODS: A total of 20 Wistar rats were randomly divided into polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold and polylactic acid-glycolic acid copolymer scaffold groups. Polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold and polylactic acid-glycolic acid copolymer scaffold were respectively used for repair after the establishment of laryngeal cartilage defect models. RESULTS AND CONCLUSION: The laryngeal cartilage defect diameter of rats at 3, 5 and 7 days after modeling in the polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold group was significantly smaller than that in the polylactic acid-glycolic acid copolymer scaffold group. The laryngeal cartilage defect of rats in the polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold group was basically repaired and presented with a smooth surface, and there were no clear boundaries with surrounding tissues; however, the laryngeal cartilage defect of rats in the polylactic acid-glycolic acid copolymer scaffold group had indentations with a rough surface, and there were obvious boundaries with surrounding tissues. These results demonstrate that polylactic acid-glycolic acid copolymer/hydroxyapatite composite scaffold can promote the repair of laryngeal cartilage defect part, and its repair effect is more ideal.