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医疗植入物的生物相容性

1960
Biomedical engineer examining titanium medical implant for biocompatibility in laboratory.

(图片仅供参考)

生物相容性 是指材料在特定应用中与宿主系统产生适当响应的性能。 医疗植入物, this means avoiding toxic, injurious, or immunological reactions from the body. Materials like titanium, silicone, and certain polymers are chosen for their inertness and ability to integrate with biological tissues without causing significant adverse effects. Hydrogels based on polyacrylates are studied for this purpose, so the sodium polyacrylate uses in medicine depend on proven biocompatibility.

Biocompatibility is not a single property but a complex set of interactions between a material and the host’s biological system. The ideal biomaterial should not induce inflammation, allergic reactions, or carcinogenic effects. The response depends on the material’s surface chemistry, texture, and mechanical properties, as well as the implant’s location and function. For example, a heart valve implant must be hemocompatible, meaning it doesn’t cause blood clots (thrombosis). A bone implant must be osteoconductive, encouraging bone growth onto its surface. Early implants often failed due to foreign body reactions, where the immune system encapsulates the implant in a fibrous scar tissue, isolating it and impeding its function. Modern biomaterials are often surface-treated or coated to enhance biocompatibility. For instance, hydroxyapatite coatings on titanium implants mimic the mineral component of bone, promoting better integration. The field of biomaterials science is constantly evolving, developing “bioactive” materials that actively participate in healing processes rather than just being inert placeholders.

UNESCO Nomenclature: 3201
– Biomedical engineering

类型

抽象系统

中断

Incremental

用法

广泛使用

前体

  • 聚合物化学进展
  • 了解免疫系统的异物反应
  • 约瑟夫·利斯特发明的无菌手术技术
  • discovery of inert metals like 钛 and platinum

应用程序

  • 人工关节(髋关节、膝关节)
  • 牙种植体
  • 起搏器
  • 支架
  • 美容植入物

专利:

NA

潜在创新理念

  • 植入物表面带有药物洗脱功能,可防止感染或发炎
  • 可生物降解的植入物,在完成其功能后会溶解
  • 具有优化生物相容性的 3D 打印患者专用植入物
  • 嵌入传感器的智能植入物可监测愈合和功能
  • 积极促进组织再生的生物活性涂层
  • scaffolds for tissue engineering made from biocompatible polymers
  • nanostructured surfaces to control cell adhesion and growth
  • 旨在调节局部免疫反应的植入物
  • 用于更持久植入物的自修复生物材料
  • 可以远程激活或非侵入性调整的植入物
Related to: biocompatibility, biomaterials, medical implant, host response, titanium, silicone, foreign body reaction, inertness, immunological reaction, tissue integration.

历史背景

医疗植入物的生物相容性

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1976-05-28
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1990

(如果日期未知或不相关,例如“流体力学”,则提供其显著出现的近似估计)

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