一个可生物降解,骨再生和生物机械强大的聚酸骨螺丝用于临床骨科手术
Yeping Xie1, Jiayu Tan2, Shijian Fang3
1State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, China.
International journal of biological macromolecules
|November 14, 2024
概括
这项研究通过结合柔性纤维来增强Poly (L-乳酸) (PLLA) 骨科植入物,显著提高性和骨质活性,以更好地固定和修复骨.
科学领域:
- 生物材料科学 生物材料科学
- 整形外科工程 整形外科工程
- 聚合物科学 聚合物科学
背景情况:
- 由于强度和生物降解性,聚 (L-乳酸) (PLLA) 对骨科植入物具有前景.
- 限制包括性低和骨质诱导性不足,阻碍临床应用.
研究的目的:
- 为了增强基于PLLA的骨科植入物的性和骨质生成活性.
- 开发一种新的复合结构,灵感来自建筑增强技术.
主要方法:
- 制造具有"海岛"形态的PLLA/poly (丁烯酸盐-co-adipate) (PBSA) /酸 (HA) 复合材料.
- 在骨头螺丝的微注塑成型过程中在现场形成定向的PBSA纤维.
- 机械测试 (拉伸,曲) 和体内研究 (HE,马森染色).
主要成果:
- 在休息时显著增加延长 (5.4%至59.4%),具有最佳的PBSA/HA比率.
- 保持高刚度和拉伸强度略有下降.
- 在复合骨螺丝中显著增加了性,并在体内确认了骨质生成潜力.
结论:
- 开发的PLLA/PBSA/HA复合结构有效地提高了植入物性和骨质生成活性.
- 微注射成型为制造改进的基于PLLA的骨固定装置提供了一种可行的方法.
- 这种方法为推进骨科固定装置在骨修复中提供了一个有前途的战略.
相关概念视频
01:40Bone Remodeling
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
01:31Bone Remodeling and Repair
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...