Researchers at the University of Connecticut have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
To facilitate repair, doctors may install a metal plate to support the bone as it fuses and heals. Yet that can be problematic. Some metals leach ions into surrounding tissue, causing inflammation and irritation. Metals are also very stiff. If a metal plate bears too much load in the leg, the new bone may grow back weaker and be vulnerable to fracture.
The new composite is also resilient. Large leg bones in adults and seniors can take many months to heal. The composite developed in their lab does its job and then starts to degrade after a year. No surgery is required for removal.
This picture depicts a breakdown of the spider silk material with bone marrow. The composite is made of silk fibers and fibers of polylactic acid that are coated with fine bioceramic particles to add strength while maintaining flexibility. The biodegradable composite helps heal bones without the complications posed by metal parts.
Article here:
https://www.sciencedaily.com/releases/2018/04/180419130915.htm
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