This particular discovery was in the news a few months ago, but here's a new article on it:
It's called LLLT low-level light therapy (also referred to as photobiomodulation - PBM). They were able to get dentin in teeth to regrow, and they are talking about it possibly working on the skin.
Here's the pertinent quotation:
"The research promises a broad range of clinical applications in restorative dentistry and regenerative medicine, including wound healing and bone growth. And it hints at dramatic changes for dentistry and other disciplines."
Just thought I'd share some promising news since there's no word about Dextran Hydrogel.