7 citations,
January 2018 in “Journal of Tissue Viability” An 80-year-old patient grew new hair on a wound, showing that elderly people can still regenerate hair.
12 citations,
September 2007 in “Wound repair and regeneration” Smad2/3-dependent TGF-β signaling increases during wound healing.
28 citations,
July 2011 in “Journal of Plastic Reconstructive and Aesthetic Surgery” A patient had skin tissue death at the hair removal site after a hair transplant, which was treated with surgery.
The conclusion is that closing scalp wounds is possible, but restoring hair without donor material is still a major challenge.
3 citations,
April 2016 in “Dermatologic Surgery” A man's forehead and eyebrow were successfully reconstructed with a skin and hair graft that matched his other eyebrow, without needing frequent trimming.