What materials can be used to make tissue-engineering scaffolds?

In the field of tissue engineering, scaffolds serve as essential templates that support cell growth and the formation of new biological tissue. These structures can be categorized into natural and biomimetic or synthetic materials.12

Natural Scaffolds

Natural scaffolds are often derived from the extracellular matrix (ECM) of decellularized tissues or organs. Common examples include:2
* Collagen: A primary structural protein used to create scaffolds.12
* Proteoglycans: Proteins containing long carbohydrate chains.2
* Biological tissues: ECMs sourced from materials such as pig small intestine submucosa or pig and human dermis.3

Biomimetic and Synthetic Scaffolds

Biomimetic scaffolds are designed to replicate the microenvironment of natural tissue and can be constructed from various synthetic or inorganic materials:32
* Polymers: Biodegradable polymers such as polyester, polylactic acid, and polyglycolic acid are frequently used. Other synthetic options include silicone and polyurethanes.12435
* Ceramics and Glasses: Bioceramics, including calcium phosphate compounds like hydroxylapatite, are used for bone repair because they are bioactive and can be resorbed by the body.6
* Metals: Certain metals are utilized in structural applications where high strength is required.27

Researchers often combine these materials to optimize properties such as biodegradability, mechanical strength, and biocompatibility, ensuring the scaffold effectively supports the regeneration of specific tissues.364